Published by De Gruyter

Volume 37 Issue 7

Issue of Zeitschrift für Naturforschung B

Contents
Journal Overview

Open Access June 2, 2014

Beiträge zur Chemie des Phosphors, 116 Kernresonanzspektren und Kristallstruktur von Tri-tert-butylcyclotriphosphan / Contributions to the Chemistry of Phosphorus, 116 NMR Spectra and Crystal Structure of Tri-tert-butylcyclotriphosphane

Josef Hahn, Marianne Baudler, Carl Krüger, Yi-Hung Tsay

Page range: 797-805

More Download PDF

Abstract

A complete analysis of the 31 P, 13 C and 1 H NMR spectra of tri-tert-butyl-cyclotriphosphane (1) was carried out and the resulting NMR parameters were correlated with the X-ray data of the molecule. It was found, that increasing P-P-C-bond angles correspond to a downfield shift and an increase of the absolute values of the negative 1 J(PP) and 1 J(PC) coupling constants. Generally, the chemical shifts of cyclotriphosphanes as well as of larger cyclic phosphanes depend on the endo- and exocyclic bond angles, the dihedral angle between the electron lone pairs of adjacent P-atoms, and the β-effect. On the basis of the X-ray and chemical shift data of 1, the bond angles of other cyclotriphosphanes can be deduced from their δ( 31 P) values. 1 crystallizes triclinically in the space group P1̄ with Z = 4 formula units. The X-ray analysis confirms the NMR-spectroscopically determined three-membered ring structure with the tert-butyl substituents on either side of the ring plane. Due to steric hindrance between the two tert-butyl groups in cis position, the corresponding P-P-C-bond angles show the largest values so far observed for organylcyclophosphanes.

Open Access June 2, 2014

Kristallstrukturen und Schwingungsspektren des Heteropolysulfats [N(CH₃)₄]₆S₂V₂W₁₆O₆₂ und des Vanadatowolframats Na[N(CH₃)₄]₂VW₅O₁₉ · H₂O / Crystal Structures and Vibrational Spectra of the Heteropolysulfate [N(CH₃)₄]₆S₂V₂W₁₆O₆₂ and the Vanadatotungstate Na[N(CH₃)₄]₂VW₅O₁₉ · H₂O

Alexandru Botar, Joachim Fuchs

Page range: 806-814

More Download PDF

Abstract

X-ray analysis of [N(CH 3 ) 4 ] 6 S 2 V 2 W 16 O 62 furnishes evidence for the existence of a discrete heteropolysulfate ion. The compound crystallizes monoclinic, space group P2 1 /C with lattice parameters a = 13.361(5) Å, b = 25.378(1) Å, c = 28.847(5) and β = 91.37(3)°. Its anion has the configuration (Dawson structure) first observed in K 6 P 2 W 18 O 62 · 14 H 2 O. [N(CH 3 ) 4 ] 2 NaVW 5 O 19 · H 2 O, formed as a side product in the preparation of the hetero-polysulfate, crystallizes in the orthorhombic space group Pmnm with lattice constants a = 12.810(3) Å, b = 10.842 Å and c = 9.703(4) Å. Its anion belongs to the known hexa-metallate type M 6 O 19 z− . The sodium ion is pentacoordinate (trigonal bipyramidal). The water of crystallization belonging to its coordination sphere exhibits the extremely short Na-O distance of 2.19 Å. The Na + ··· H 2 O grouping appears to cause an IR as well as Raman active vibration band at 1290 cm -1 .

Open Access June 2, 2014

Darstellung von Diphenylbismutcarboxylaten / Preparation of Diphenylbismuth Carboxylates

Friedo Huber, Sigrid Bock

Page range: 815-817

More Download PDF

Abstract

Diphenylbismuth carboxylates Ph 2 BiX (X = OAc = CH 3 COO, C 2 H 5 COO, C 3 H 7 COO, Me 2 CHCOO, Me 3 CCOO, CH 3 COCH 2 CH 2 COO, PhCOO; Me = CH 3 ; Ph = C 6 H 5 ) have been prepared from Ph 2 BiCl and NaX or from Ph 2 BiOC 2 H 5 and HX in anhydrous ethanol. PhoBiOAc and a compound of approximate composition PhBi(OAc) 2 have been obtained in small yields from acidolysis of Ph 3 Bi with HOAc (molar ratio 1:1 and 1:3, resp.) in acetone. A polymeric structure with bridging bidentate carboxylate groups is proposed for Ph 2 BiX compounds.

Open Access June 2, 2014

Darstellung und Kristallstruktur von KNaO und RbNaO / Preparation and Crystal Structure of KNaO and RbNaO

Horst Sabrowsky, Ulrich Schröer

Page range: 818-819

More Download PDF

Abstract

Potassium Sodium Oxide, Rubidium Sodium Oxide The compounds KNaO and RbNaO have been prepared and their structures determined by powder and single crystal data. Both compounds show the anti-PbFCl crystal structure type with two molecular units. KNaO: a = 400.2(1) pm, c = 621.4(2) pm, c/a= 1.553; RbNaO: a = 409.3(9) pm, c = 653.1(9) pm, c/a = 1.595. Abstract The compounds KNaO and RbNaO have been prepared and their structures determined by powder and single crystal data. Both compounds show the anti-PbFCl crystal structure type with two molecular units. KNaO: a = 400.2(1) pm, c = 621.4(2) pm, c/a= 1.553; RbNaO: a = 409.3(9) pm, c = 653.1(9) pm, c/a = 1.595.

Open Access June 2, 2014

Synthesen von Adenin und Guanin aus Ammoniumcyanid und Cyansäure in Zeolith X / Synthesis of Adenine and Guanine from Ammonium Cyanide and Cyanic Acid in Zeolithe X

Fritz Seel, Martin von Blon, Andreas Dessauer

Page range: 820-822

More Download PDF

Abstract

Adenine (1) is formed in substantial amounts (about 1% yield) by heating ammonium cyanide absorbed in zeolithe X for several days at 120 °C. If both, ammonium cyanide and cyanic acid have been absorbed, 1 and guanine (2) are synthesized under the same conditions. These experiments provide the first demonstration of the possibility of a spontaneous synthesis of these essential constituents of nucleic acids and of important coenzymes in a silicate.

Open Access June 2, 2014

The Crystal Structure of Carbonyl Gold(I) Chloride, (OC)AuCl

Peter G. Jones

Page range: 823-824

More Download PDF

Abstract

The crystal structure of (OC)AuCl has been determined and refined to R 0.037 (space group Cmcm, a = 407.1(1), b = 1042.2(4), c = 532.1(3) pm, Z =4). The structure consists of discrete, exactly linear molecules; all atoms lie on the special positions 0, y, 1/4. The bond lengths involving the light atoms are affected by libration. The shortest Au ··· Au contacts between molecules are 338 pm.

Open Access June 2, 2014

Some New Conducting Solids: Cation-Deficient Metal Dimercaptodithiolenes and Selenium Analogs

G. C. Papavassiliou

Page range: 825-827

More Download PDF

Abstract

Some new conducting solids of the general formula Z x M(C 3 S 5 ) 2 and its selenium analogs (where: Z = Bu 4 N, Na, Li, NH 4 ; M = Ni, Pd, Pt etc.; 0 < x ≤ 1) were prepared and studied.

Open Access June 2, 2014

S₄N₄ und seine Derivate: Darstellung, Struktur und Thermolyse von CuBr · S₄N₄ / S₄N₄ and its Derivatives: Preparation, Structure and Thermolysis of CuBr · S₄N₄

Ulf Thewalt, Bernhard Müller

Page range: 828-831

More Download PDF

Abstract

The crystalline black polymeric Cu I complex CuBr · S 4 N 4 can be prepared in high yield from Cu(NO 3 ) 2 · 3 H 2 O, NH 4 Br and S 4 N 4 in methanol. An X-ray structure analysis shows that it is isostructural with CuCl · S 4 N 4 . The crystals contain [CuBr] ∞ chains and the Cu atoms of adjacent chains are bridged by S 4 N 4 groups. The Cu atoms have an almost tetrahedral coordination. The 1,3-N,N′-bonded S 4 N 4 group has the same conformation and, within narrow limits, the same dimensions as free S 4 N 4 . Thermolysis of CuBr · S 4 N 4 at 180 °C yields among other products CuBr, S 4 N 4 , and S 2 N 2 .

Open Access June 2, 2014

Röntgenograpliische und magnetische Untersuchungen an perowskitverwandten Cyanoverbindungen CsM^IIM^III(CN)₆ / X-Ray and Magnetic Studies of Perovskite-Related Cyano Compounds CsM^IIM^III(CN)₆

W.-D. Griebler, D. Babel

Page range: 832-837

More Download PDF

Abstract

The perovskite-related cyano compounds CsM II Cr(CN) 6 (M II = Mn, Zn), CsZnFe(CN) 6 and CsMnCo(CN) 6 (Mn = Mn-Cu) are characterized by their IR active C - N and M III -CN stretching frequencies, their lattice constants and their magnetic susceptibilities (4,2-295 K). Except for CsCuCo(CN) 6 , which is tetragonally distorted, all compounds crystallize cubically face-centered (with lattice constants in the range from 1020 to 1084 pm). The magnetic behaviour indicates low spin M III and high spin M II states, supporting the IR evidence for a strictly ordered M III -CN-M II arrangement. The compound CsMnCr(CN) 6 is ferrimagnetic, with a Néel temperature of T N = 90 K and an extrapolated spontaneous magnetization of a = 2,30 μ B at 0 K. Superexchange interactions via the cyano bridges are considered responsible for the ferrimagnetism observed.

Open Access June 2, 2014

On the Structure of the Claasz's Sulfurylindoxyl

László Somogyi

Page range: 838-840

More Download PDF

Abstract

On chemical, IR and 1 H NMR spectroscopic evidences the structure of the so-called sulfurylindoxyl was found to be 2-aminophenyl methyl sulfone (4) and not the benzo-thiazoline-1,1-dioxide (7) claimed by Claasz [1]. Contrary to data in the literature [2] the title compound gives only one sort of monoacetyl derivatives: 2-acetamidophenyl methyl sulfone (10). An unambiguous synthesis of 3-acetylbenzothiazoline-1,1-dioxide (8) is presented.

Open Access June 2, 2014

Meso-rac-Ph(X)P-(CH₂)₄-P(X)Ph-Liganden in Komplexen des Typs (CO)₄M cis(L-L), Untersuchung der Stereoisomerie durch ³¹P{¹H}-und ¹³C{¹H}-NMR-Spektroskopie / Meso, rac-Ph(X)P-(CH₂)₄-P(X)Ph Ligands in Complexes of the Type (CO)₄M cis(L-L), Investigation of Stereoisomerism by ³¹P{¹H} and ¹³C{¹H} NMR Spectroscopy

Klaus Diemert, Wilhelm Kuchen, Jürgen Kutter

Page range: 841-844

More Download PDF

Abstract

By reaction of M(CO) 6 (M = Cr, Mo, W) with the bifunctional aminophosphane Ph(NEt 2 )P-(CH 2 ) 4 -P(NEt 2 )Ph (L-L) octahedral complexes (CO) 4 M cis(L-L) are obtained. While it is shown by 31 P{ 1 H} NMR spectroscopy, that these complexes contain meso-and rac-(L-L) to a different extent, there is evidence from 13 C{ 1 H} NMR data obtained for the Mo complex, that the rac-ligand always prevails. As racemisation is observed when the Mo complex reacts with HBr to give (CO) 4 Mo-cis[Ph(Br)P-(CH 2 ) 4 -P(Br)Ph] an S N 1 -mechanism is suggested for this reaction.

Open Access June 2, 2014

Übergangsmetall-substituierte Phosphane, Arsane und Stibane, XXX Redoxreaktionen zwischen Triorganodibromphosphoranen oder -arsoranen und Ubergangsmetall -Anionen / Transition-Metal Substituted Phosphanes, Arsanes and Stibanes, XXX Redox Reactions between Triorganodibromophosphoranes or -arsoranes and Transition Metal Anions

Angelika Meyer, Anna Hartl, Wolfgang Malisch

Page range: 845-850

More Download PDF

Abstract

The reaction of the sodium carbonyl metalate Na[W(CO) 3 Cp] with the phosphorane (Me 3 SiCH 2 ) 3 PBr 2 results in the formation of (Me 3 SiCH 2 ) 3 PandCp(CO) 3 WBr or [Cp(CO) 3 W] 2 , respectively, depending on the solvent used. The redox reactions between Na[Mo(CO) 3 Cp] and the arsenic analogue (RCH 2 ) 3 AsBr 2 (R = Ph, Me 3 Si) yield the products Cp(CO)sMoBr and (RCH 2 ) 3 As. A mechanism involving radicals is discussed. At elevated temperatures the products react further to give the square pyramidal complexes cis-Cp(CO) 2 [As(CH 2 R) 3 ]MBr (1, 2a, b) with loss of CO. In an analogous manner Cp(CO) 3 MBr (M = Mo, W) and (RCH 2 ) 3 E (E = As, Sb) afford compounds cis-Cp(CO) 2 [E(CH 2 R) 3 ]MBr (2c, 3). The dynamic behaviour of the chiral complexes 1, 2a, b, was investigated by 1 H NMR spectroscopy.

Open Access June 2, 2014

2.5-Dihydro-und Tetrahydro-2.2-dimethyl-3-thiophenaldehyd / 2,5-Dihydro-and Tetrahydro-2,2-dimethjd-3-thiophenealdehyde

Wolfgang Sucrow, Hans-Walter Müller

Page range: 851-854

More Download PDF

Abstract

The preparation of the title aldehydes 1 and 6 a, the corresponding alcohols 2 a and 6 b and some other derivatives is described.

Open Access June 2, 2014

Synthesis and Structure of 1,2-Bis(2,4,6-tri-fert-butylphenyl)ethane

Werner Winter, Thomas Butters, Anton Rieker, Yasuo Butsugan

Page range: 855-862

More Download PDF

Abstract

The title compound 9, C 38 H 62 , was prepared by dehalogenation of 2,4,6-tri-tert-butyl-benzyl chloride (7a). It crystallizes in the monoclinic space group C2/c with Z = 4. a = 10.923(7), b = 17.910(3), c = 17.395(3) Å and β = 91.87(3)° (the cell constants refer to 173 K). The structure was solved by direct methods and refined by full-matrix least squares to R = 0.073 for all 3853 reflexions (|F 0 | > 0). On account of steric repulsions, the central ethane bond, which lies on a twofold crystallographic axis, is stretched to 1.567(4) Å. Close packing of the molecules in layers parallel the ac-plane leads to boat-deformations of the benzene rings. Room-temperature data sets of weakly diffracting crystals [a = 10.948(6), b= 17.97(1), c= 17.52(2) and β = 91.9(1)°] do not give rise to an artificial shortening of the central ethane bond of 9. Evidently, poor data quality or lack of resolution have not to be considered as an explanation for the unusual short ethane bond [1.47(3) Å] in the first undamped hexaphenylethane [Stein, Winter, and Rieker (1978)].

Open Access June 2, 2014

Preparation and Structures of Ternary Copper(II) Complexes of ADP and ATP Models for Enzyme-Metal Ion-Nucleoside Polyphosphate Complexes

William S. Sheldrick

Page range: 863-871

More Download PDF

Abstract

The stable ternary copper(II) complexes of ATP and ADP, [Cu(H 2 ATP)(phen)] 2 · 7 H 2 O (2) and [Cu 4 (HADP) 2 (bipy) 4 (H 2 O) 2 (NO 3 ) 2 ] · 2 NO 3 (3), have been isolated from aqueous solution at respective pH values of 2.8 and 4.0. Their structures have been established by single crystal X-ray diffraction. Tridentate coordination of each of the Cu atoms by ono α-, one β- and one γ-phosphate O atom of one ATP molecule is observed in 2. The binding O α atoms occupy axial positions in a distorted octahedral geometry at Cu and the Cu- O α interactions are weak. The other axial position is occupied by a γ-phosphate O atom of the second ATP molecule, leading to a dimeric structure. The basic structure of 3 is similar with, in this case, bidentate coordination of each of the central Cu atoms by one α- and one β-phosphate O atom of ono ADP molecule. In this case, however, the third terminal β-phosphate O atoms each bind a further Cu atom. All four Cu atoms in 3 display square pyramidal coordination. The structures of 2 and 3 are stabilised by intramolecular stacking of adenine and phenanthroline/bipyridyl systems. The significance of these structures as models for enzyme-metal ion-nucleoside polyphosphate complexes is discussed.

Open Access June 2, 2014

Antiovulatory Potency and Conformation of an Antagonist of the Luteinizing Hormone-Releasing Hormone Having Six D-Amino Acids

Karl Folkers, Cyril Y. Bowers, Frank Momany, Klaus J. Friebel, Teresa Kubiak, Joseph Mahera

Page range: 872-876

More Download PDF

Abstract

[N-Ac-Thr 1 ,D-Phe 2 ,D-Trp 3,6 ]-LHRH was the model antagonist of LHRH, which was the basis for tho design, synthesis and bioassay of seven peptides having four, five and six D-amino acids, which resulted from three single, three double, and one triple introductions of D-amino acids in positions 4, 5 and 8 of the model. Only the analog with six D-amino acids, [N-Ac-Thr 1 ,D-Phe 2 ,D-Trp 3 ,D-Ser 4, D-Tyr 5 ,D-Trp 6 ,D-Arg 8 ]-LHRH, had antiovulatory activity which was higher than that of the model antagonist, i.e., 70% antiovulatory activity at 25 μg/rat compared with 50% activity at 50 μg/rat, respectively. Empirical energy calculations gave a conformational structure for [N-Ac-Thr 1 ,D-Phe 2 ,D-Trp 3 , D-Ser 4 ,D-Tyr 5 ,D-Arg 6 ,D-Arg 8 ]-LHRH which is similar to that calculated for previous potent antagonists. These results are a basis of new designs of antagonists having D-sub-stituents in up to ten positions toward effective inhibitors of ovulation by the parenteral and oral routes of administration.

Open Access June 2, 2014

2-Phenylthiazol-Derivate aus Pseudomonas cepacia / 2-Phenylthiazole Derivatives from Pseudomonas cepacia

G. J. Bukovits, N. Mohr, H. Budzikiewicz

Page range: 877-880

More Download PDF

Abstract

From the culture medium of Pseudomonas cepacia 2-(o-hydroxyphenyl)-thiazol and its 4-carbaldehyd and 4-carboxylic acid derivatives (aeruginoic acid) could be isolated. Their structures were elucidated and confirmed by synthesis.

Open Access June 2, 2014

Umwandlung von 5H-Dibenz[c.e]azepinen in Phenanthridine über cyclische N-Diazonium-Ionen / Conversion of 5H-Dibenzo[c,e]azepines into Phenanthridines via Cyclic N-Diazonium Ions

Richard Kreher, Udo Bergmann

Page range: 881-885

More Download PDF

Abstract

The reaction of 6-amino-6,7-dihydro-5H-dibenzo[c,e]azepine, bearing a terminal blocking group, with trifluoracetylnitrite presumably proceeds via cyclic 7-membered N-diazonium ions and mainly leads to the formation of phenanthridine by migration of the aryl group. 5H-Dibenzo[c,e]azepine can be isolated as the minor product and seems to be the result of a hydrogen shift. N ,N′-Azo-6,7-dihydro-5H-dibenzo[c,e]azepine dis-plays an analogous behaviour.

Open Access June 2, 2014

Synthesis of N-Trityl-L-homoserine

Kleomenis Barlos, Dimitrios Theodoropoulos

Page range: 886-888

More Download PDF

Abstract

L-Homoserine was tritylated via its silylated product with Me 2 SiCl 2 or Ph 2 SiCl 2 in 65-68% yield. Also N-Trt-L-methionine upon treatment with Mel and degradation of the resulting sulfonium salt with KOH yielded N-Trt-L-homoserine in 75% yield. Both routes provided N-Trityl-L-homoserine with identical physical data. In contrast to N-alkyloxycarbonyl-L-homoserine derivatives, N-Trt-L-homoserine shows no tendency to spontaneous lactonization.

Open Access June 2, 2014

0-(Triphenylstannyl)-N-acyl-N-arylhydroxylamines

Mrinal K. Das, Matilal Nath

Page range: 889-891

More Download PDF

Abstract

A number of O-(triphenylstannyl)-N-acyl-N-arylhydroxylamines have been synthesized. Results of IR, electronic (UV) and 1 H NMR spectroscopic measurements suggest that these compounds possess trigonal bipyramidal configuration around a pentacoordinated tin atom with phenyl groups cis to each other.

Open Access June 2, 2014

Keto-Steroids, I Conversion of Diosgenin to 6 β-Methylpregn-4-ene-6 α,20-diol-3,16-dione

A. M. Dawidar, A. A. Saleh, F. M. Abdel-Galil, M. M. Abdel-Malek

Page range: 892-895

More Download PDF

Abstract

The reaction of diosgenin (1) with hydrogen peroxide/formic acid was investigated. As a result of this work, 5 α (25 R)-spirostane-3 β,5,6 β-triol (2) was prepared in 79% yield and 5 α-pregnane-3 β,5,6 β,16 β,20 α-pentol (3) in 80% yield. The pentol (3) was oxidised to 5 α-pregnane-3 β,5,10 β,20 α-tetrol-6-one (5) without forming its 16 β,20 α-isopropylidenedioxy derivative (4). Reaction of product 5 with CH 3 Mgl to give 6-methylpregnane derivative was unsuccessful. Therefore, product 7 was oxidatively degraded by H 2 O 2 /HCOOH to the 10-keto pregnane derivative (13) and its structure was proved through its transformation to 6 β-methylpregn-4-ene-6 α,20 α-diol-3,16-dione (15).

Open Access June 2, 2014

Synthese von 1.2.4-Oxadiazolyl-und 1.2.4-Thiadiazolylvinylphosphaten und deren biologische Wirkung / Synthesis of 1,2,4-Oxadiazolyl-and 1,2,4-Thiadiazolylvinylphosphates and their Biological Activity

Börries Kübel, Werner Knauf, Anna Waltersdorfer

Page range: 896-901

More Download PDF

Abstract

2-(1,2,4-Oxadiazol-5-yl)vinylphosphates and 2-(1,2,4-thiadiazol-5-yl) vinylphosphates are prepared from the corresponding chlorophosphates and 5-acetonyl-1,2,4-oxadiazoles and 5-acetonyl-1,2,4-thiadiazoles resp. Some of the oxazolylvinylphosphates are effective insecticides and acaricides, but the corresponding thiadiazole derivatives have almost no effect.

Open Access June 2, 2014

Triazolyloximinoderivate, ihre Synthese und biologische Wirkung / Triazolyloximino Derivatives, their Preparation and Biological Activity

Jean Kocur, Hilmar Mildenberger, Burkhard Sachse

Page range: 902-906

More Download PDF

Abstract

Triazolyloximinoethers are fungicides with high activity. Methods for the synthesis of these compounds and their stereochemistry are reviewed.

Open Access June 2, 2014

Chinazolinderivate, ihre Herstellung und biologische Wirkung / Quinazolines, their Preparation and Biological Activity

Hubert Schönowsky, Burkhardt Sachse

Page range: 907-911

More Download PDF

Abstract

Quinazolines are fungicides with high activity. Methods to synthesis these compounds are reviewed.

Open Access June 2, 2014

Funktionelle Derivate von Phenoxyplienoxypropionsäuren und ihre herbizide Wirksamkeit / Derivatives of Phenoxyphenoxypropionic Acids and their Herbicidal Activity

Reinhard Handte, Manfred Koch, Hermann Bieringer, Gerhard Hörlein

Page range: 912-922

More Download PDF

Abstract

Derivates of phenoxyphenoxypropionic Acids are herbicids with high activity. Methods to synthesis these compounds are reviewed. Relationship between structure and herbicidal activity are discussed.

Open Access June 2, 2014

Neue Benzylester von Cyclopropancarbon- und Phenylessigsäuren als potentielle Insektizide / New Benzylic Esters of Cyclopropanecarboxylic and Phenylacetic Acids as Potential Insecticides

Wolfgang Welter, Thomas Hüttelmaier, Karl Matterstock, Hilmar Mildenberger

Page range: 923-929

More Download PDF

Abstract

Pyrethroids are known insecticides with a great potency to a wide range of insect species. Derivatizations at the benzylic position and at the second aromatic ring system of these pyrethroids yielded new benzylic esters with insecticidal activity. Methods for the synthesis of these compounds are reviewed.

Open Access June 2, 2014

Notizen: Die Kristallstruktur von Hexametliylentetrammoniumtrichloromercurat (II), [C₆H₁₃N₄] [HgCl₃}] / The Crystal Structure of Hexamethylenetetrammoniumtrichloromercurate( II), [C₆H₁₂N₄][HgCl₃]

Joachim Pickardt, Thomas Schendler

Page range: 930-932

More Download PDF

Abstract

By the react ion of mercuric chloride and hexamethylenetetramine in aqueous solution crystals of the title compound could be obtained. The compound contains planar trichloromercurate (II) anions; in the crystal they form infinite chains, interlinked by chloride bridges.

Open Access June 2, 2014

Notizen: 2,4′ -Oxybispyridine

Jean E. Rockley, Lindsay A. Summers

Page range: 933-934

More Download PDF

Abstract

2,4′-Oxybispyridine is synthesised by reacting 4-nitropyridine with the silver salt of 2-hydroxy-pyridine.

Open Access June 2, 2014

The Defensive Secretion of Aspavia brunna (Schout) (Hetetoptera: Pentatomidae)

M. I. Akpata, T. 0. Olagbemiro

Page range: 935-936

More Download PDF

Abstract

The pungent odours emitted by true bugs when disturbed have captured the attention of numerous students of the Heteroptera. Studies of the chemical composition of the secretion of these stink bugs have shown the presence of alkanes, alkenyl acetates, alcohols and unsaturated aldehydes [1-3]. Most of these chemicals are employed as chemical warfare against the onslaught of microbial, vertebrate and in-vertebrate attackers [4], We herein report the chemical investigation of a previously unstudied secretion of a pentatomid bug, Aspavia brunna. The combined gas chromatography -mass spectrometry provides an excellent method for the study of the secretions of insects. We have utilized this technique and our results are summarized below.

About this journal

Objective
Zeitschrift fuer Naturforschung B (ZNB) publishes novel research in all areas of inorganic chemistry, organic chemistry, and analytical chemistry. In particular, the journal focuses on solid state chemistry, coordination chemistry, main group element chemistry, synthetic organic chemistry, natural product chemistry and, to a lesser extent, on analytical chemistry. For more than 65 years Zeitschrift fuer Naturforschung B has been open to contributions from all fields of experimental and theoretical chemistry. Zeitschrift fuer Naturforschung B publishes 12 issues per volume/year. Sometimes double issues occur.

Topics

Solid state chemistry
Coordination chemistry
Main group element chemistry
Organic chemistry
Natural product chemistry

Article formats
Original (full) papers, research notes and preliminary communications, reports on specific research topics of current interest (reviews)

> Information on submission process

Volume 37 Issue 7

Issue of Zeitschrift für Naturforschung B

Beiträge zur Chemie des Phosphors, 116 Kernresonanzspektren und Kristallstruktur von Tri-tert-butylcyclotriphosphan / Contributions to the Chemistry of Phosphorus, 116 NMR Spectra and Crystal Structure of Tri-tert-butylcyclotriphosphane

Abstract

Kristallstrukturen und Schwingungsspektren des Heteropolysulfats [N(CH3)4]6S2V2W16O62 und des Vanadatowolframats Na[N(CH3)4]2VW5O19 · H2O / Crystal Structures and Vibrational Spectra of the Heteropolysulfate [N(CH3)4]6S2V2W16O62 and the Vanadatotungstate Na[N(CH3)4]2VW5O19 · H2O

Abstract

Darstellung von Diphenylbismutcarboxylaten / Preparation of Diphenylbismuth Carboxylates

Abstract

Darstellung und Kristallstruktur von KNaO und RbNaO / Preparation and Crystal Structure of KNaO and RbNaO

Abstract

Synthesen von Adenin und Guanin aus Ammoniumcyanid und Cyansäure in Zeolith X / Synthesis of Adenine and Guanine from Ammonium Cyanide and Cyanic Acid in Zeolithe X

Abstract

The Crystal Structure of Carbonyl Gold(I) Chloride, (OC)AuCl

Abstract

Some New Conducting Solids: Cation-Deficient Metal Dimercaptodithiolenes and Selenium Analogs

Abstract

S4N4 und seine Derivate: Darstellung, Struktur und Thermolyse von CuBr · S4N4 / S4N4 and its Derivatives: Preparation, Structure and Thermolysis of CuBr · S4N4

Abstract

Röntgenograpliische und magnetische Untersuchungen an perowskitverwandten Cyanoverbindungen CsMIIMIII(CN)6 / X-Ray and Magnetic Studies of Perovskite-Related Cyano Compounds CsMIIMIII (CN)6

Abstract

On the Structure of the Claasz's Sulfurylindoxyl

Abstract

Abstract

Abstract

2.5-Dihydro-und Tetrahydro-2.2-dimethyl-3-thiophenaldehyd / 2,5-Dihydro-and Tetrahydro-2,2-dimethjd-3-thiophenealdehyde

Abstract

Synthesis and Structure of 1,2-Bis(2,4,6-tri-fert-butylphenyl)ethane

Abstract

Preparation and Structures of Ternary Copper(II) Complexes of ADP and ATP Models for Enzyme-Metal Ion-Nucleoside Polyphosphate Complexes

Abstract

Antiovulatory Potency and Conformation of an Antagonist of the Luteinizing Hormone-Releasing Hormone Having Six D-Amino Acids

Abstract

2-Phenylthiazol-Derivate aus Pseudomonas cepacia / 2-Phenylthiazole Derivatives from Pseudomonas cepacia

Abstract

Umwandlung von 5H-Dibenz[c.e]azepinen in Phenanthridine über cyclische N-Diazonium-Ionen / Conversion of 5H-Dibenzo[c,e]azepines into Phenanthridines via Cyclic N-Diazonium Ions

Abstract

Synthesis of N-Trityl-L-homoserine

Abstract

0-(Triphenylstannyl)-N-acyl-N-arylhydroxylamines

Abstract

Keto-Steroids, I Conversion of Diosgenin to 6 β-Methylpregn-4-ene-6 α,20-diol-3,16-dione

Abstract

Synthese von 1.2.4-Oxadiazolyl-und 1.2.4-Thiadiazolylvinylphosphaten und deren biologische Wirkung / Synthesis of 1,2,4-Oxadiazolyl-and 1,2,4-Thiadiazolylvinylphosphates and their Biological Activity

Abstract

Triazolyloximinoderivate, ihre Synthese und biologische Wirkung / Triazolyloximino Derivatives, their Preparation and Biological Activity

Abstract

Chinazolinderivate, ihre Herstellung und biologische Wirkung / Quinazolines, their Preparation and Biological Activity

Abstract

Funktionelle Derivate von Phenoxyplienoxypropionsäuren und ihre herbizide Wirksamkeit / Derivatives of Phenoxyphenoxypropionic Acids and their Herbicidal Activity

Abstract

Neue Benzylester von Cyclopropancarbon- und Phenylessigsäuren als potentielle Insektizide / New Benzylic Esters of Cyclopropanecarboxylic and Phenylacetic Acids as Potential Insecticides

Abstract

Notizen: Die Kristallstruktur von Hexametliylentetrammoniumtrichloromercurat (II), [C6H13N4] [HgCl3}] / The Crystal Structure of Hexamethylenetetrammoniumtrichloromercurate( II), [C6H12N4][HgCl3]

Abstract

Notizen: 2,4′ -Oxybispyridine

Abstract

The Defensive Secretion of Aspavia brunna (Schout) (Hetetoptera: Pentatomidae)

Abstract

S₄N₄ und seine Derivate: Darstellung, Struktur und Thermolyse von CuBr · S₄N₄ / S₄N₄ and its Derivatives: Preparation, Structure and Thermolysis of CuBr · S₄N₄

Röntgenograpliische und magnetische Untersuchungen an perowskitverwandten Cyanoverbindungen CsM^IIM^III(CN)₆ / X-Ray and Magnetic Studies of Perovskite-Related Cyano Compounds CsM^IIM^III(CN)₆

Notizen: Die Kristallstruktur von Hexametliylentetrammoniumtrichloromercurat (II), [C₆H₁₃N₄] [HgCl₃}] / The Crystal Structure of Hexamethylenetetrammoniumtrichloromercurate( II), [C₆H₁₂N₄][HgCl₃]