Published by De Gruyter

Volume 45 Issue 1

Issue of Zeitschrift für Naturforschung B

Contents
Journal Overview

Publicly Available June 2, 2014

Titelei

Page range: I-II

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Publicly Available June 2, 2014

Page range: III-XX

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Open Access June 2, 2014

Die Kristallstruktur von Ga₃Cl₇/ Crystal Structure of Ga₃Cl₇

Walter Frank, Wolfgang Hönle, Arndt Simon

Page range: 1-7

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Abstract

Trigallium heptachloride, G a 3 Cl 7 , has been prepared from GaCl 3 and Ga in sealed glass ampoules. Ga 3 Cl 7 crystallizes in the space group Pna2 1 (No. 33) with a = 1181.8(1) pm; b = 889.7(1) pm; c = 1057.5(1) pm; Z = 4. The compound is isotypic with KGa 2 Cl 7 - . The Ga 2 Cl 7 - anion has nearly C2 symmetry (gauche conformation) with d̄ (Ga -Cl bridg ) = 230.3 pm, d̄ (Ga -Cl term ) = 214.3 pm and and ∢ Ga -Cl -Ga = 109.0°. The Ga + ion is coordinated by ten Cl atoms (4 + 6) with d = 346.2 pm. The coordination of Ga + and the conformation of Ga 2 Cl 7 - are discussed in detail together with related compounds.

Open Access June 2, 2014

Na₅InTe₄ und Na₅In₂Te₆ — Erste Beispiele für Neso-sowie Ditelluro-verbrückte Inotelluroindate/Na₅InTe₄ and Na₅In₂Te₆ — First Examples of Neso-and Ditelluro-Bridged Inotelluroindates

Brigitte Eisenmann, Achim Hofmann, Roland Zagler

Page range: 8-14

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Abstract

Single crystals of the ternary com pounds Na 5 InTe 4 and Na 5 In 2 Te 6 have been grown from the melt und have been investigated by X-ray single crystal techniques. Na 5 InTe 4 : orthorhombic, space group Pbcn; Z = 8; a = 742.7(4) pm, b = 2015.4(8) pm, c = 1773.3(6) pm; Na 5 In:Te 6 : orthorhombic, space group Cmc2 1 ; Z = 8; a = 902.1(4) pm, b = 1536.1(5) pm , c = 2356.5(6) pm. The crystal structure of Na 5 InTe 4 contains isolated InTe 4 tetrahedra (mean bond length: 278.8 pm). In the crystal structure of Na 5 In 2 Te 6 InTe 4 tetrahedra are connected through common vertices to "Zweiereinfach"-chains. Two neighbouring chains each are joined further to ribbons through Te -Te bridges between every second InTe 4 tetrahedron.

Open Access June 2, 2014

Pentaalkyl-Derivate des 2 ,3 - Dihiydro-1,3-diborols/Pentaalkyl Derivatives of the 2,3-Dihydro-1,3-diborole

G . Knörzer, W. Siebert

Page range: 15-18

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Abstract

Double hydroboration of acetylene, propyne-1 and t-butylacetylene with HBCl 2 · OEt 2 /BCl3 leads to the 1,1-bis(dichloroboryl)alkanes 2d, e, f, in which halogen exchange is achieved by BI 3 to give 3d, e, f. Redox reactions between butyne-2, hexyne-3 and 3 result in the formation of compounds 4, which are alkylated with AlMe 3 and AlEt 3 to give the pentaalkyl derivatives 1d, e, f. Reactions of 1 with [(C 5 H 5 )Co(C 2 H 4 ) 2 ] an [(C 5 H 5 )N iCO] 2 lead to the complexes 5 and 6.

Open Access June 2, 2014

Di-cyano-″propyl-arsan als Edukt für den Aufbau mehrkerniger arsanverbrückter Cobalt-Cluster/Di-cyano-″propyl-arsine as Educt for the Formation of Multinuclear Arsino-Bridged Cobalt Clusters

Heinrich Lang, Uwe Lay, Laszlo Zsolnai

Page range: 19-24

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Abstract

( n C 3 H 7 )As(CN) 2 (1) reacts with CO 2 (CO) 8 (2) to yield the cluster 3 in which two ( n C 3 H 7 )As fragments are coordinated to Co(CO)n (n = 1, 2, 3) groups. The cluster 3 has been characterized by analytical and spectroscopic data and by an X -ray analysis.

Open Access June 2, 2014

Ligandenaustauschreaktionen zwischen Halogenboranen und Alkylsilanen/Ligand Exchange Reactions between Haloboranes and Alkylsilanes

Wolfgang Einholz, Walter Gollinger, Wolfgang Haubold

Page range: 25-30

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Abstract

In a ligand exchange reaction between BHal 3 (Hal = Cl, Br) and the tetraalkylsilanes Et 4 Si, (Me 3 Si) 2 CH 2 or Ph 2 CHSiMe 3 the alkylhaloboranes EtBBr 2 or MeBHal 2 and the alkylhalosilanes Et 3 SiBr, HalMe 2 Si-CH 2 -SiMe 3 , (HalMe 2 Si) 2 CH 2 , and Ph 2 CHSiMe 2 Br, respectively, are formed. Similarly, the methyloligosilanes (Me 3 Si) 2 (1) and (Me 3 Si) 2 SiMe 2 (2) react with BHal 3 (Hal = Cl, Br, I) via methyl-halogen-transfer to give HalMe 2 Si-SiMe 3 (Hal = Cl, Br, I), (HalMe 2 Si) 2 (Hal = Br, I), HalMe 2 Si - SiMe 2 -SiMe 3 , (Me 3 Si) 2 SiMeHal, HalMe 2 Si - SiMeHal -SiMe 3 , (HalMe 2 Si)SiMe 2 (Hal = Cl, Br) or (BrMe 2 Si) 2 SiMeBr besides MeBHal 2 (Hal = Cl, Br, I) and Me 2 BI, respectively.

Open Access June 2, 2014

Ammonium Hexavanadate, (NH₄)₂V₆O₁₆: Preparation, Crystal Structure, Infrared Spectra and High-Pressure Reactions

Klaus-Jürgen Range, Christiane Eglmeier, Danita de Waal, Anton M. Heyns

Page range: 31-38

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Abstract

Following a re-examination of several published methods for the preparation of ammonium hexavanadate, single crystals of (NH 4 ) 2 V 6 O 16 have been grown by a reaction of V 2 O 5 with NH 4 Cl in hot aqueous solution. They are monoclinic, space group P 2 1 /m , with a = 7.858(2), b = 8.412(2), c = 4.995(1) Å , β = 96.43(2)°, and Z = 1. The structure was refined to R = 0.060, wR = 0.039 for 745 unique reflections. It comprises layers built of V 2 O 8 double square pyramids ( V - O = 1.595- 1.988 Å) and distorted VO 6 octahedra ( V - O = 1.589-2.287 Å). The infrared bands of the NH 4 + - and ND 4 + - groups in (NH 4 ) 2 V 6 O 16 and its deuterated analogue can be assigned with a fair amount of certainty at 90 K under the space group P 2 1 /m (C 2h 2 ). The N - D stretching modes of isotopically diluted NH 3 D + -groups in (NH 4 ) 2 V 6 O 16 are in agreement with the predicted splitting into C s , C s and C 1 (2) components. The frequencies and shapes of these modes seem to suggest that bifurcated hydrogen bonds are formed, closely resembling the corresponding bonds in NH 4 VO 3 . The NH 4 + ions are dynamic in character in (NH 4 ) 2 V 6 O 16 and remain so down to temperatures of 90 K. At high temperatures in a closed high-pressure system a redox reaction between vanadium (V ) and ammonia takes place which yields VO 2 as main product. Intermediates have been found, but up to now their com position is still unknown.

Open Access June 2, 2014

Synthesis and Reactivity of Copper(II) Complexes with New Binucleating Ligands Derived from 16-or 20-Membered N₄-Macrocycles

Yuzo Nishida

Page range: 39-44

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Abstract

New binucleating ligands, (L 1 ) N ,N′,N″,N‴-tetrakis(2-benzimidazolylmethyl)-1,4,9,12-tetra-azacyclohexadecane, and (L 2 ) N ,N′,N″,N‴-tetrakis(2-benzimidazolylmethyl)-1,4,11,14-tetra-azacycloeicosane were prepared. From the reaction mixture of copper(II) salt and the ligand, new binuclear copper(II) complexes, Cu 2 (L 1 ) (NO 3 ) 4 (1), Cu 2 (L 2 )(NO 3 ) 4 (2), Cu 2 (L 2 )Br 4 (3), and trinuclear complexes, Cu 3 (L 1 )Cl 6 (4), and Cu 3 (L 2 )Cl 6 (5) were obtained. Cyclic voltammograms revealed that the trinuclear complexes 4 and 5 are composed with the binuclear complex (1 or 2) and [CuCl 4 ] 2- . The interaction between two metal ions in the binuclear complexes are confirmed on the basis of the ESR spectra. These binuclear complexes exhibit higher catalytic activity for the oxidation of TMPD by O 2 molecule than those of structurally rigid binuclear copper(II) complexes and of flexible binuclear complexes in which two copper(II) coordination sites are linked by a single polyatomic chain.

Open Access June 2, 2014

Thioharnstoff-Derivate als Liganden in Eisen-Komplexen: Synthese und Kristallstrukturen von [FeI₂L₂], [Fe₂I₄L₃], (L -L)²+[FeI₄^-]₂ (L = (Me₂N )₂CS) und [Fe₂I₄(C₆H₁₀(NH-CS -NHMe)₂)₂] mit einer Notiz zu [FeIL₃]⁺[Fe₄S₄I₃L]^-/Thiourea Derivatives as Ligands in Iron Complexes: Syntheses and Crystal Structures of [FeI₂L₂], [Fe₂I₄L₃], (L -L)²+[FeI₄^-]₂ (L = (Me₂N )₂CS) and [Fe₂I₄(C₆H₁₀(NH-CS -NHMe)₂)₂] and a Note on[FeIL₃]⁺[Fe₄S₄I₃L]^-

Ulrich Bierbach, Wolfgang Saak, Detlev Haase, Siegfried Pohl

Page range: 45-52

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Abstract

[FeI 2 L 2 ] (1) and [Fe 2 I 4 L 3 ] (2) are obtained from the reaction o f FeI 2 and 1,1,3,3-tetramethylthiourea (L) in tetrahydrofuran solution. The Fe(III) complex [FeI 3 L] (3) and iodine react in dichloromethane to give (L-L ) 2+ [FeI 4- ] 2 (4). The bidentate thiourea derivative C 6 H 10 (NH - CS -NHMe) 2 (5) reacts in acetonitrile solution with Fel 2 producing the dinuclear complex [Fe 2 I 4 (C 6 H 10 (NH - CS -NHMe) 2 ) 2 ] (6). 1 and 2 were obtained in nearly quantitative, 4 and 6 in good (ca. 87%) yield. The structures of 1, 2 ,4 and 6 were determined from single crystal X-ray diffraction data. 1 crystallizes in the monoclinic space group C 2/c with a = 1862.5(1), b = 1084.0(1), c = 1433.4(1) pm, β = 134.01(1)°. V = 1994.69 x 10 6 pm 3 , Z = 4, conventional R 0.055. The complex exhibits a two-fold symmetry and a distorted tetrahedral coordination of Fe(II). 2: monoclinic, C 2/c, a = 1968.9(2), b = 902.8(1), c = 2222.4(2) pm, β = 123.35(1)°, V = 3299.91 x 10 6 pm 3 , Z = 4, conventional R 0.036. The metals of the dinuclear complex of 2 are sulfur-bridged with distorted tetrahedral coordination of Fe(II). The bridging sulfur lies on a two-fold axis. 4: monoclinic, P2 1 /c, a = 1135.3(2), b = 1791.9(5), c = 1642.1(4) pm, β = 93.53°, V = 3334.00 x 10 6 pm 3 , Z = 4, conventional R 0.044. The mean Fe -I bond length within the tetrahedral Fel 4 - anions is 254.1 pm. The (Me 2 N) 2 CS - S(NMe 2 ) 2 2+ cation exhibits a CS - SC dihedral angle of 75.9° and an S - S bond length o f 205.2(4) pm. In the dinuclear complex of 6 two bidentate ligands coordinate two FeI 2 units in such a way that a central eighteen-membered ring is formed. The complex shows a two-fold symmetry. Angles at the (pseudotetrahedral) metal range from 102.1(1) to 118.2(1)°. The reported synthetic and structural studies and the isolation of [FeIL 3 ] + [Fe 4 S 4 I 3 L] - (7) indicate that thiourea derivatives seem to be useful ligands for the stabilization o f neutral Fe -S clusters.

Open Access June 2, 2014

Reaktionen von N-Lithio-N, N′-di(t-butyl)-S-phenylsulfinsäureimidamid mit Chloriden der Elemente der 4. Gruppe des Periodensystems Struktur des O[TiCl₂N₂(Bu^t)₂SPh]₂/Reactions of N -Lithio-N ,N′-di(t-butyl)-S -phenylsulfinic Acid Imidamide with Chlorides of the Elements of Group 4 of the Periodic System Structure of O[TiCl₂N₂(Bu^t)₂SPh]₂

H . W . Roesky, B. Mainz, M. Noltemeyer

Page range: 53-58

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Abstract

N-Lithio-N,N′-di(t-butyl)-S-phenylsulfinic acid imidamide (1) reacts with TiCl 4 , SiCl 4 , GeCl 4 , SnCl 4 and Ph 2 SnCl 2 with monosubstitution at the metal center to yield compounds 2-6. TiCl 3 N 2 (Bu t ) 2 SPh (2) slowly hydrolyzes to form O[TiCl 2 N 2 (Bu t ) 2 SPh] 2 (7). The molecular structure of 7 was investigated by an X-ray structure analysis.

Open Access June 2, 2014

Gasphasen-Reaktionen, 71 PE-Spektren und Pyrolysen stickstoffreicher Kohlenstoff-Verbindungen: CN₄, C₂N₄, C₂H₂N₄, C₄H₆N₄ und C₅H₄N₄ Gasphase Reactions, 72 PE Spectra and Pyrolyses of Nitrogen-Rich Carbon Compounds: CN₄, C₂N₄, C₂H₂N₄, C₄H₆N₄ and C₅H₄N₄

Hans Bock, Ralph Dammel

Page range: 59-71

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Abstract

The PE spectra of the nitrogen-rich title compounds cyanogen azide NC-N 3 , azodicarbonitrile NC - N = N - CN, azidoacetonitrile NC - H 2 C - N 3 , tetrazolo[1,5-a]pyridine (H 4 C 5 N)(N ) 3 and trimethylenetetrazole (H 2 C) 3 (CN 4 ) are presented and assigned by radical cation state comparison with related compounds or by Koopmans’ correlation with MNDO eigenvalues. In a low pressure flow system the compounds decompose at higher temperatures, with elimination of the thermodynamically favorable N 2 molecule. PE-spectroscopic real-time analysis reveals as further products: NC - N 3 → C ∞ , NC - N = N - CN → NC - CN , NC - H 2 C - N 3 → 2HCN (+ traces NC - HC = NH?) and (H 2 C) 3 (CN 4 ) → H 2 C = N - CN + H 2 C = CH 2 . For tetrazolo[1,5-a]pyridine, a preceding ring opening to the corresponding 2-azidopyridine is observed.

Open Access June 2, 2014

Reaktionen von Re₂O₇ mit Iminophosphoranen - Kristallstruktur von ( O₃ReN = PPh₂)₂C₂H₄/Reactions of Re₂O₇ with Iminophosphoranes - Crystal Structure of (O₃ReN = PPh₂)₂C₂H₄

Herbert W. Roesky, Detlev Hesse, Mathias Rietzel, Mathias Noltemeyer

Page range: 72-76

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Abstract

Re 2 O 7 reacts with (Me 3 SiN = PPh 2 ) 2 CH 2 , (Me 3 SiN = PPh 2 ) 2 C 2 H 4 and Me 3 SiN = PPh 3 to give (O 3 ReN = PPh 2 ) 2 CH 2 (3), (O 3 ReN = PPh 2 ) 2 C 2 H 4 (6) and Ph 3 P= NReO 3 (7). 6 has been characterized by X-ray crystallography. The complex crystallizes in the space group P 1̄ with unit cell dimensions a = 837.4(4), b = 873.0(5), c = 1102.5(6) pm, ɑ = 112.53(4), β = 98.54(4), γ = 100.59(4)°, and Z = 1. The structure demonstrates that the bis(diphenylphosphinimino)-ethane group is bridging two ReO 3 units.

Open Access June 2, 2014

[2+3]-Cycloadditionsreaktionen von Nitrilen mit Bis(triphenylphosphoranyliden)iminiumazid/[2 + 3]Cyclo-Addition Reactions of Nitriles with Bis(triphenylphosphoranyliden)iminium Azide

Jörg Sundermeyer, Herbert W. Roesky, Mathias Noltemeyer

Page range: 77-79

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Abstract

Cyanogen and the two isomers of S(CN) 4 ((2) and (3)) react with [Ph 3 PNPPh 3 ] + N 3 - (Ph 3 PNPPh 3 equals PPN) or [Me 4 N] + N 3 - to yield the tetrazolides [PPN] + [C 2 N 5 ] - (4), [PPN] + [C 4 N 7 S] - (5), isomer (6) and [Me 4 N] + [C 4 N 7 S] - (7), respectively. The X-ray structure of (7) is reported. The [C 4 N 7 S] - anion is completely planar. It consists of two five-membered rings. Pyrolysis of (7) in an FD mass spectrometer gives anions of composition [C 4 N 5 ] - and [C 6 N 5 ] - .

Open Access June 2, 2014

Mannich Reaction with 1 ,3 - Indandione Phenylhydrazones

E. M. Afsah, M. Hammouda, H. Zoorob, M. M. Khalifa, M. T. Zimaity

Page range: 80-82

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Abstract

Mannich reaction of 1,3-indandione-1-phenylhydrazone (1) or 1,3-diphenylhydrazone (5) with morpholine or piperazine gave the Mannich base-phenylhydrazone 2 and 3 or the diphenylhydrazone 6 and 7, respectively. Whereas, such reaction with 1 or 5 using primary amines afforded the indeno[2,1-ƒ]-1,2,4-triazepin-6(2H)-one (4) or its 6-phenylhydrazone (8), respectively. Treatment of 5 with ammonium acetate and formalin afforded 9. The indeno[1,2-ƒ]-1,2,4,5- tetrazepin-10(2H)-one (11) was obtained from the 1,2-diphenylhydrazone 10 and formaldehyde.

Open Access June 2, 2014

Steroids from Aquatic Organisms, XIX. New Sterols from the Antarctic Sponge Artemisina apollinis

Alicia M. Seldes, Mónica E. Deluca, Eduardo G. Grosa, Juana Rovirosa, Aurelio San-Martín, José Darias

Page range: 83-86

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Abstract

The steroidal composition of the sponge Artemisina apollinis from the Antarctic Ocean was studied by GC-MS and 'H NMR. The sponge contains twenty-eight C 25—C30 derivatives having four different types of nucleus: 3/3-hydroxy-5aH-, 3-keto-5aH-derivatives, 3/3-hydroxy-zl5-and 3/?-hydroxy-zl7-derivatives. Compounds with the first two nucleus are the most abundant, with similar side chain patterns and identical GC profiles. The 3-keto-5aH-derivatives constitute a new group of natural products.

Open Access June 2, 2014

Studies on the Structure of β-Chitin

Naheed Akhtar, M. A. Haleem

Page range: 87-92

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Abstract

Parallel chain system for the structure of β-chitin is studied from a stereochemical point of view and the structure has been refined by least squares procedures. As a first step correct atomic positions representing standard configuration of glucopyranose ring, peptide unit and CH 2 OH group have been redetermined in the unit cell. The unit cell is monoclinic with dimensions a = 4.85 Å, b = 10.38 Å (fibre axis), c = 9.26 Å and β = 97.5°. The space group is P2 1 . The refinement has been done using five geometrical parameters, temperatur factor and the scaling factor. The R and Ø-value are found to be 0.235 and 37.61, respectively. The refined structure is found to be free from all short contacts. The refined chains form interhydrogen bond of the type N - H · · · O 7 = C 7 and intrahydrogen bond of the type O 5 - H · · · O 3 . The present calculations suggest that an intra-sheet O 6a -H - O 7 hydrogen bond cannot be formed in the present structure. This behaviour will certainly explain the different properties of β-chitin having less number of hydrogen bonds as compared to a-chitin.

Open Access June 2, 2014

A Convenient Method for the Preparation of (±)Juvenile Hormone III

Juan B. Rodriguez, Eduardo G. Gros

Page range: 93-95

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Abstract

Following a different approach methyl (2 E ,6 E)-farnesoate (4) was prepared in three steps from trans-geranylacetone (1). Compound 4 was regioselectively epoxidized to (±)juvenile hormone III.

Open Access June 2, 2014

Biological Activity of Synthetic Juvenile Hormone Analogues (JHA) for Trypanosoma cruzi

Page range: 96-98

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Abstract

Juvenile Hormone Analogues. Trypanosoma cruzi, Growth Inhibition Several juvenile hormone analogues, among them Fenoxycarb and authentic JH-III, were tested as growth inhibitors for Trypanosoma cruzi cultivated in vitro. The same compounds were also assayed for inhibition of tritium labelled-thymidine incorporation into T. cruzi cells. The results indicated that those analogues containing sulfur showed important activity against the development of the cells. Interesting inhibition values were also found for the remaining fenoxy-fenoxy derivatives assayed.

Open Access June 2, 2014

Die Phasendiagramme der Systeme Dimethyldichlorsilan mit 2.4-Lutidin und 2.6-Lutidin/Phase Diagrams of Dimethyldichlorosilane with 2.4-Lutidine and 2.6-Lutidine

Karl Hensen, Michael Dräbing

Page range: 99-100

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Abstract

A phase equilibrium study of the systems dimethyldichlorosilane with 2.4-lutidine and 2.6-lutidine is presented with evidence for the existence of the incongruently melting compounds 2.6-lutidine · Me 2 SiCl 2 , (2.6-lutidine) 2 · Me 2 SiCl 2 and the congruently melting compound 2.4-lutidine · Me 2 SiCl 2 .

Open Access June 2, 2014

Synthese und Kristallstruktur von [ 15-Krone-5-CuCl(CH₃CN)]⁺CuCl₃^- Synthesis and Crystal Structure of [15-Crown-5-CuCl(CH₃CN)]⁺CuCl₃^-

Dieter Fenske, Helmut Goesmann, Thilo Ernst, Kurt Dehnicke

Page range: 101-104

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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 45 Issue 1

Issue of Zeitschrift für Naturforschung B

Titelei

Contents

Die Kristallstruktur von Ga3Cl7/ Crystal Structure of Ga3Cl7

Abstract

Na5InTe4 und Na5In2Te6 — Erste Beispiele für Neso-sowie Ditelluro-verbrückte Inotelluroindate/Na5InTe4 and Na5In2Te6 — First Examples of Neso-and Ditelluro-Bridged Inotelluroindates

Abstract

Pentaalkyl-Derivate des 2 ,3 - Dihiydro-1,3-diborols/Pentaalkyl Derivatives of the 2,3-Dihydro-1,3-diborole

Abstract

Di-cyano-″propyl-arsan als Edukt für den Aufbau mehrkerniger arsanverbrückter Cobalt-Cluster/Di-cyano-″propyl-arsine as Educt for the Formation of Multinuclear Arsino-Bridged Cobalt Clusters

Abstract

Ligandenaustauschreaktionen zwischen Halogenboranen und Alkylsilanen/Ligand Exchange Reactions between Haloboranes and Alkylsilanes

Abstract

Ammonium Hexavanadate, (NH4)2V6O16: Preparation, Crystal Structure, Infrared Spectra and High-Pressure Reactions

Abstract

Synthesis and Reactivity of Copper(II) Complexes with New Binucleating Ligands Derived from 16-or 20-Membered N4-Macrocycles

Abstract

Abstract

Abstract

Gasphasen-Reaktionen, 71 PE-Spektren und Pyrolysen stickstoffreicher Kohlenstoff-Verbindungen: CN4, C2N4, C2H2N4, C4H6N4 und C5H4N4 Gasphase Reactions, 72 PE Spectra and Pyrolyses of Nitrogen-Rich Carbon Compounds: CN4, C2N4, C2H2N4, C4H6N4 and C5H4N4

Abstract

Reaktionen von Re2O7 mit Iminophosphoranen - Kristallstruktur von ( O3ReN = PPh2)2C2H4/Reactions of Re2O7 with Iminophosphoranes - Crystal Structure of (O3ReN = PPh2)2C2H4

Abstract

[2+3]-Cycloadditionsreaktionen von Nitrilen mit Bis(triphenylphosphoranyliden)iminiumazid/[2 + 3]Cyclo-Addition Reactions of Nitriles with Bis(triphenylphosphoranyliden)iminium Azide

Abstract

Mannich Reaction with 1 ,3 - Indandione Phenylhydrazones

Abstract

Steroids from Aquatic Organisms, XIX. New Sterols from the Antarctic Sponge Artemisina apollinis

Abstract

Studies on the Structure of β-Chitin

Abstract

A Convenient Method for the Preparation of (±)Juvenile Hormone III

Abstract

Biological Activity of Synthetic Juvenile Hormone Analogues (JHA) for Trypanosoma cruzi

Abstract

Die Phasendiagramme der Systeme Dimethyldichlorsilan mit 2.4-Lutidin und 2.6-Lutidin/Phase Diagrams of Dimethyldichlorosilane with 2.4-Lutidine and 2.6-Lutidine

Abstract

Synthese und Kristallstruktur von [ 15-Krone-5-CuCl(CH3CN)]+CuCl3- Synthesis and Crystal Structure of [15-Crown-5-CuCl(CH3CN)]+CuCl3-

Die Kristallstruktur von Ga₃Cl₇/ Crystal Structure of Ga₃Cl₇

Na₅InTe₄ und Na₅In₂Te₆ — Erste Beispiele für Neso-sowie Ditelluro-verbrückte Inotelluroindate/Na₅InTe₄ and Na₅In₂Te₆ — First Examples of Neso-and Ditelluro-Bridged Inotelluroindates

Ammonium Hexavanadate, (NH₄)₂V₆O₁₆: Preparation, Crystal Structure, Infrared Spectra and High-Pressure Reactions

Synthesis and Reactivity of Copper(II) Complexes with New Binucleating Ligands Derived from 16-or 20-Membered N₄-Macrocycles

Gasphasen-Reaktionen, 71 PE-Spektren und Pyrolysen stickstoffreicher Kohlenstoff-Verbindungen: CN₄, C₂N₄, C₂H₂N₄, C₄H₆N₄ und C₅H₄N₄ Gasphase Reactions, 72 PE Spectra and Pyrolyses of Nitrogen-Rich Carbon Compounds: CN₄, C₂N₄, C₂H₂N₄, C₄H₆N₄ and C₅H₄N₄

Reaktionen von Re₂O₇ mit Iminophosphoranen - Kristallstruktur von ( O₃ReN = PPh₂)₂C₂H₄/Reactions of Re₂O₇ with Iminophosphoranes - Crystal Structure of (O₃ReN = PPh₂)₂C₂H₄

Synthese und Kristallstruktur von [ 15-Krone-5-CuCl(CH₃CN)]⁺CuCl₃^- Synthesis and Crystal Structure of [15-Crown-5-CuCl(CH₃CN)]⁺CuCl₃^-