Published by De Gruyter

Volume 39 Issue 3

Issue of Zeitschrift für Naturforschung B

Contents
Journal Overview

Open Access June 2, 2014

Kristall- und Molekülstrukturen von zwei trans-1.2.4.5-Tetraza-3.6-diphospha-cyclohexan-3.6-disulfiden / Crystal and Molecular Structures of Two trans- 1,2,4,5-Tetraza-3,6-diphospha-cyclohexane-3,6-disulfides

Franz Dirschl, Heinrich Nöth

Page range: 269-274

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Abstract

The crystal and molecular structures of two trans-1,2,4,5-tetraza-diphospha-3,6-cyclohexane- 3,6-disulfides, 2 and 3, have been determined by X-ray diffraction methods. The 3,6-diphenyl- 1,2,4,5-tetramethyl-derivative 2 crystallizes in the monoclinic system, space group C He. Its P2N 4 heterocycle adopts a twist conformation. In contrast, the hexamethyl derivative 3 is triclinic, space group P1̅, and its ring shows chair conformation. Torsion angles in these two compounds and similar ones reveal less interaction between lone pairs of electrons on adjacent N-atoms in the chair conformation but stronger interaction of those bound to phosphorus. It is suggested that the latter interaction is responsible for the larger N -P -N bond angle (107°) as compared to the smaller one (101°) in the P 2 N 4 rings present in twist conformation.

Open Access June 2, 2014

Beiträge zur Chemie des Phosphors, 135 [1]. Synthese und Strukturen neuer polycyclischer Organophosphane P_nR_m (m < n) / Contributions to the Chemistry of Phosphorus, 135 [1]. Synthesis and Structures of Novel Polycyclic Organophosphanes P_nR_m (m < n)

Marianne Bäudler, Volker Arndt

Page range: 275-283

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Abstract

The novel polycyclic organophosphanes b-P 9 R 5 , P 10 R 6, P 10 R 4, P 11 R 5, and P 13 R 5 (R = Me, Et, i-Pr) have been obtained by reacting RPCl 2 with white phosphorus and magnesium or by thermolysing P 7 R 5 (perhaps in the presence of P 8 R 6 , P 9 R 5 or (PR)5). A strategy for the enrichment or isolation of polycyclic organophosphanes P n R m (m < n) from complex reaction mixtures is described. The structures of the above mentioned compounds have been unambiguously clarified by 31 P NMR spectroscopy or X-ray structure analysis. The results clearly indicate that the corresponding phosphorus hydrides P n N m have the same structures. The general structural principles of polycyclic phosphanes are dicussed.

Open Access June 2, 2014

Carboxydiphenylphosphansulfide / Carboxydiphenyl Phosphane Sulfides

Heinz-Werner Hennig, Peter Sartori, Ulrich Steinbrecht

Page range: 284-289

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Abstract

Carboxydiphcnyl phosphane sulfides (C 6 H 5 ) 2 P(S)(OC(O)R) (2) (R = CH 3 2a, C 2 H 5 2b, C 17 H 35 2c, (CH 3 ) 3 C 2d, C 6 H 5 2e) were prepared by reacting silver salts of carboxylic acids AgOC(O)R with (C 6 H 5 ) 2 P(S)Cl (Scheme 1) or by treating carboxylic acids with (C 6 H 5 ) 2 P(S)Cl in the presence of triethyl amine (Scheme 2) and spectroscopically characterized. Thermal stability and stability against hydrolysis of the mixed anhydrides is unusually high.

Open Access June 2, 2014

Fluoride und Fluorosäuren, VI. Verbindungsbildung und Kristallstrukturen im System Ammoniak—Fluorwasserstoff [1, 2] / Fluorides and Fluoro Acids, VI. Compound Formation and Crystal Structures in the System Ammonia-Hydrogen Fluoride

Dietrich Mootz, Wolfgang Poll

Page range: 290-297

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Abstract

The melting diagram of the quasi-binary system NH 3 -HF between the limits NH 4 HF 2 and HF was redetermined. The compounds NH 3 · 4HF, NH 3 · 5HF and NH 3 · 8HF with melting points of 26, -14 (dec.) and -95 °C (dec.), respectively, were established as the stable phases. Their crystal structures were determined as those of ammonium hydrogen fluorides NH 4 [F(HF)4], NH 4 [F(HF) 4 ] and NH 4 [HF 2 (HF) 3 ] · 3HF with extended N-H···F and F-H···F hydrogen bonding.

Open Access June 2, 2014

Fluoride und Fluorosäuren, VII [1]. Kristallstrukturen von Säurehydraten und Oxoniumsalzen, XXII [2]. Hydratbildung der Trifluoressigsäure sowie Strukturen eines Monohydrats und eines Tetrahydrats [3]. / Fluorides and Fluoro Acids, VII [1] Crystal Structures of Acid Hydrates and Oxonium Salts, XXII [2]. Hydrate Formation of Trifluoroacetic Acid and Structures of a Monohydrate and a Tetrahydrate [3]

Dietrich Mootz, Dagmar Boenigk

Page range: 298-304

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Abstract

The liquidus and solidus lines of the quasi binary system CF 3 COOH-H 2 O were determined by low temperature difference thermal analysis and the resulting phase relations controlled by X-ray powder diffraction. Formation of a monohydrate and a tetrahydrate, melting congruently at -43 and -16 °C, respectively, is confirmed. In addition a metastable form of the monohydrate and a low temperature form of the tetrahydrate, stable below -47 °C, are indicated. The crystal structures of the stable high temperature forms were determined. From these the monohydrate (tetragonal, space group I42d, Z = 16) is a true acid hydrate, CF 3 COOH-H 2 O, and the tetrahydrate (triclinic, P1̅, Z = 2) a hydrated oxonium salt, (H 5 O 2 ) + [H(CF 3 COO) 2 ] - · 6H 2 O.

Open Access June 2, 2014

Phasenbeziehungen im System Schwefel—Chlor sowie Kristallstrukturen von SCl₂ und SCl₄ [1]. / Phase Relations in the System Sulfur—Chlorine and Crystal Structures of SCl₂ and SCl₄

Rüdiger Kniep, Lutz Körte, Dietrich Mootz

Page range: 305-309

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Abstract

From new DTA and powder diffraction measurements in the binary system sulfur-chlorine a consistent construction of the melting diagram for the region 50-100 atom-% CI was possible. It contains sulfur chlorides of the elemental ratios 1:1, 1:2, 1:3, and 1:4 as the stable intermediate phases, which melt at -80 °C (congr.), -125 °C (incongr.). -75 °C (incongr.) and -34 °C (congr.), respectively. SCI is S 2 C 12 as characterized by its crystal structure by R. Kniep, L. Korte and D. Mootz, Z. Naturforsch, 38b, 1 (1983). Of SC 12 a single crystal was grown by zone melting in a capillary and its structure determined as composed of angular molecules SC 12 arranged in bimolecular layers (orthorhombic space group P2 1 2 1 2 1 ; a = 400.19, b = 918.8, c = 1750.5 pm at -134 °C; Z = 4). With SCl 3 a new binary solid of the system is reported of a yet unknown structure. SCl 4 from its powder diffraction pattern is made probable as an isotype of α-SeCl 4 , with tetrameric cubane-like molekules S 4 Cl 16 .

Open Access June 2, 2014

Die Kristallstruktur des „Indium-Diiodids“ (In^IIn^IIII₄) / The Crystal Structure of “Indium -Diiodide” (In^IIn^IIII₄)

H. P. Beck

Page range: 310-313

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Abstract

The crystal structure of In I In III I 4 (Indium-diiodide) has been determined by single crystals X-ray methods. The compound crystallized with a GaCl 2 -type arrangement in the orthorhombic space group Pnna (lattice constants: a = 842.7(3) pm, b = 1096.5(3) pm, c = 1117.3(3) pm). Coordination polyhedra and bond lengths are discussed in comparison with other In iodides.

Open Access June 2, 2014

Das Infrarotspektrum von matrixisoliertem SFCl / Infrared Spectrum of Matrix Isolated SFCl

Helge Willner

Page range: 314-316

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Abstract

The new compound SFCl was obtained by UV photolysis of FC(O)SCl in rare gas matrix and by UV photolysis of Cl 2 /SF 3 SF in the gas phase. Isotopic substitution verifies the molecular identity. Eight frequencies from three isotropic molecules determine the force constants f SF = 4.30 and f scl = 2.90 10 2 N/m.

Open Access June 2, 2014

Element—Element-Bindungen, III [1]. Intermolekulare Sb···Sb-Wechselwirkungen im kristallinen Tetramethyldistiban¹ / Element—Element Bonds, III [1]. Intermolecular Sb···Sb Interactions in Crystalline Tetramethyldistibane

Otto Mundt, Heinz Riffel, Gerd Becker, Arndt Simon

Page range: 317-322

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Abstract

Tetramethyldistibane which shows a colour change from deep red to pale yellow upon melting, has been subjected to single-crystal x-ray diffraction analyses at -21° and -139 °C (orthorhombic, Pnma, Z = 4, -139 °C: a = 1150.9(3); b = 1136.8(2) ; c = 651.6(2) pm). The molecules adopt the antiperiplanar conformation with the crystallographically imposed symmetry m (C s ) and are aligned in extended linear antimony chains with short intermolecular contacts (-139 °C: Sb-Sb 283.8(1), Sb···Sb 367.8(1) pm; Sb-Sb---Sb 179.2°). The structure is compared with those of similar compounds.

Open Access June 2, 2014

Carbonylniobchemie, VII. Die ³¹P—NMR-Spektren der Phosphinderivate des [Nb(η⁵-C₅H₅)(CO)₄] / Carbonyl Niobium Chemistry, VII. The ³¹P NMR Spectra of Phosphine Derivatives of [Nb(η⁵-C₅H₅)(CO)₄]

Dieter Rehder, H.-Ch. Bechthold

Page range: 323-332

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Abstract

δ( 31 P) NMR data of the complexes [Nb(Cp)(CO) 3 PZ 3 ] (Cp = η 5 -C 5 H 5 ) and cis- [Nb(Cp)(CO) 2 (PZ 3 ) 2 ] [Z = H, R (alkyl and aryl), OR, NMe 2 , PR 2 ] are interpreted on the basis of varying P(3p σ ) and P(3d π ) contributions to the bond-order density matrix in the paramagnetic deshielding term of the overall shielding constant. For Z = R, shielding of the 31 P nucleus of the coordinated phosphine decreases as the cone angle θ increases, as a result of increasing p contribution. For Z = OR and NMe 2 , P-Nb π interactions dominate, and the decrease of the P(3d π ) occupation with increasing θ leads to an increase of shielding. In the case of alkoxiphosphines, decreasing 31 P shielding is accompanied by an increase of the shielding of the metal nucleus [quantified here by δ( 51 V) of the vanadium complexes], while, for the substantially less powerful π interacting alkylphosphines, shielding trends for the two nuclei parallel each other. Coordination shifts Δδ(P) are somewhat greater for small phosphines but, spanning a range of 80 ± 30 ppm, tend to be comparatively invariant. In [V(Cp)(CO) 3 PZ 3 ], the 31 P nucleus is deshielded by 10 to 30 ppm with respect to the corresponding niobium complexes.

Open Access June 2, 2014

Crystal Structure and Mössbauer Spectroscopic Investigation of the Low Temperature Molecular Dynamics of Hexa(2-ethylimidazole)iron(II) Hydridotetracarbonylferrate(-II)

E. Bill, N. Blaes, K. F. Fischer, U. Gonser, K. H. Pauly, R. Preston, F. Seel, R. Staab, A. X. Trautwein

Page range: 333-340

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Abstract

The title compound 1 was synthesized as reaction product of pentacarbonyl iron with 2-ethylimidazole. A Zerewitinoff-determination shows that we are rather dealing with hydrido-tetracarbonylferrate(- II) than with tetracarbonylferrate(-I) as supposed in a preceding paper. A new crystal structure analysis of 1 was performed. With respect to [HFe(CO) 4 ] - we found that three CO groups are ordered with normal tetrahedral angles, while the fourth CO group shows statistical distribution over three sites (disordered sites). The temperature parameters of the disordered CO sites are considerably more anisotropic than those of the ordered CO sites. Experimental Mössbauer spectra have been recorded between 4.2 K and 288.7 K. 1 exhibits a Mössbauer pattern with two subspectra, one for each of the cations and the anions. The cation subspectrum reflects normal ferrous high-spin behavior, while the anion subspectrum shows peculiar anomalies around 200 K. On the basis of our X-ray structure results molecular orbital calculations have been performed with the aim of deriving electric field gradient tensors for the various stochastic substates of [HFe(CO) 4 ] - . These tensors were then used within the frame on an analytical lineshape formula. It turns out that the statistical distribution of the fourth CO group over three sites is associated with a jump behavior, similar to trapped diffusion, of the CO group among the three sites and not with static disorder. The Fe atom follows this jumb behavior, however, its triangular displacement body with jump distance d ~ 0.30 Å is considerably smaller than that of the CO group.

Open Access June 2, 2014

Atran-analoge Verbindungen des Typs / Atrane Analogous Compounds of the Type

Joseph Grobe, Gerald Henkel, Bernt Krebs, Nikolaos Voulgarakis

Page range: 341-351

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Abstract

Heterocyclic cage compounds of type I (compounds 8-10) have been prepared by condensation reactions of 1,2,2-trifunctional disilanes Me(R)XSiSiMeX 2 (R = Me, Ph, OEt; X = NMe 2 , OEt) with triethanolamine using the “Dilution Principle”. The starting compounds are obtained by Si-Me cleavage of Si 2 Me 6 with acetylchloride/AlCl 3 followed by either aminolysis with HNMe 2 or alcoholysis with EtOH. 1 H NMR spectra indicate N→Si(1) intraction with the more acidic Si atom in 8 and 9. This result is proved by the X-ray structure analysis of 8 (monoclinic, P2 1 /c; a = 7,088(2), b = 15,070(4), c = 12,701(4) Å, β = 104,96(2) at -130 °C, Z = 4); the Si(1)···N distance is found to be 2,768 Å , connected with a significant angular distortion of the tetrahedral coordination around Si(1) towards a trigonal bipyramid. In compound 10, too, N→Si(1) coordination is observed at room temperature in spite of almost equal acidity for both Si atoms. This can be explained by the preference of 5- over 6-membered chelating ring systems. At higher temperatures the 1 H NMR spectra show a fluctuation of the N-donor between the two Si centres.

Open Access June 2, 2014

Über einige Redox-Reaktionen von Iodgallanen und lodindanen mit organischen Disulfiden / Some Redox Reactions of Iodogallanes and Iodoindanes with Organic Disulfides

Gerhard G. Hoffmann

Page range: 352-355

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Abstract

The redox reactions between the iodogallanes Gal 3 as well as PhGaI 2 and the disulfides CH 3 SSCH 3 and PhSSPh lead to the monoalkylthio- and monoarylthiogallanes CH 3 SGaI 2 and PhSGaI 2 respectively. No reaction occurs between Inl 3 and these disulfides, whereas, surprisingly, Phlnl 2 does react to give the monoalkylthio- and monoarylthioindanes CH 3 SInI 2 and PhSInI 2 , respectively, Ph 2 GaI and Ph 2 InI form only the thioether adducts with the disulfides, which were not isolated. Initative mechanisms of these reactions are reported.

Open Access June 2, 2014

Reaktionen von Phosphanen Me_nPH_3-n (n = 0—3) mit Hexafluorisopropylidenimin / Reactions of the Phosphanes Me_nPH_3-n (n = 0—3) with Hexafluorisopropylidenimine

Helmut Kischkel, Gerd-Volker Röschenthaler

Page range: 356-358

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Abstract

The insertion of hexafluoroisopropylidenimine (1) into the P - H bonds of the phosphanes PH 3 , MePH 2 and Me 2 PH yields the (1,1,1-Trifluoro-2-amino-2-trifluoromethyl)ethylphospanes (2-4). Trimethylphosphane is oxidized to give the phosphine-imine Me 3 P = N-CH(CF 3 ) 2 (5).

Open Access June 2, 2014

Versuche zur Synthese 2.2′-disubstituierter cis-Bis(phenyl)bis(triphenylphosphan)platin(II)-Verbindungen und Kristallstruktur des cis-Bis(2-nitrophenyl)bis(triphenylphosphan)platin(II) / On the Formation of 2,2′-Disubstituted cis-Bis-(phenyl)bis(triphenylphosphane)platinum(II) Compounds and Crystal Structure Determination of cis-Bis(2-nitrophenyl)bis(triphenylphosphane)platinum(II)

Hans-Albert Brune, Manfred Wiege, Tony Debaerdemaeker

Page range: 359-368

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Abstract

Syntheses of 2,2′-disubstituted cis-Bis(phenyl)bis(ligand)platinum(II) compounds are described with respect to the influence of the ortho-substituents on reaction paths. Configuratior and conformation of the substituted phenyl rings are established by an X-ray structure determination of cis-Bis(2-nitrophenyl)bis(triphenylphosphane)platinum(II).

Open Access June 2, 2014

Synthesis of Regio- and Stereospecifically Deuterium Labelled 2-Benzylindanes

Dietmar Kuck

Page range: 369-374

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Abstract

2-Benzylindenes (1, 1a ) are hydrogenated to 2-benzylindanes (2) using tris-(triphenylphosphine)- rhodium (I)-chloride in benzene by a strict cis-1,2 addition of hydrogen to the double bond. Thus, stereo- and regio-specific deuterium labelling at the five-membered ring of various 2-benzylindanes has been carried out. The high selectivity of deuterium incorporation is shown independently by 1 H NMR and mass (MIKE*) spectrometry of selected 2-benzylindanes.

Open Access June 2, 2014

Metall-π-Komplexe von Benzolderivaten, XXI [1]. Bis(η^{1.2.3.4.4a.9a}-anthracen)chrom und Bis(η^{1.2.3.4.4a.9a}-9.10-dihydroanthrancen)- chrom durch Metallatom-Ligand-Cokondensation / Metal-π-Complexes of Benzene Derivatives, XXI [1]. Bis(η^{1.2.3.4.4a.9a}-anthracene)chromium and Bis(η^{1.2.3.4.4a.9a}-9,10-dihydroanthracene)chromium via Metal Atom Ligand Cocondensation

Christoph Elschenbroich, Reinhart Möckel, Edgar Bilger

Page range: 375-383

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Abstract

Cocondensation of chromium atoms with anthracene vapor affords bis(η 1.2.3.4.4a.9a -anthracene)- chromium (1) which was characterized as the radical cation 1 +̣ in fluid solution by means of ESR spectroscopy. Conspicuous features of this new π-complex are the ease of ligand displacement (τ 1/2 ≈ 10 min. THF, 233 K) and the ready hydrogenation in 9,10-position of the ligand which already occurs under mild conditions (e.g. methanol). The product of hydrogenation, bis (η 1.2.3.4.4a.9a -9,10-dihydroanthracene)chromium (2) was synthesized independently and studied by 1 H, 13 C NMR (2) and ESR(2 +̣ ) spectroscopy. A qualitative rationalization is given for the observed trend of increasing lability and propensity to hydrogenation: (η 6 -biphenyl) 2 chromium < (η 6 -phenanthrene) 2 chromium < (η 6 -naphthalene) 2 chromium < (η 6 -anthracene) 2 chromium.

Open Access June 2, 2014

Versuche zur Oxidation von 1.5-Benzothiazepin — bzw. 1.5-Benzoxazepin- 2.4-3H.5H-dionen / Investigations Concerning Oxidation Reactions of 1,5-Benzthiazepin — and 1,5-Benzoxazepin- 2,4-3H,5H -diones

G. Kollenz, P. Seidler

Page range: 384-389

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Abstract

Attempts to oxidize the 1,5-benzothiazepin-2,4-3H,5H-dione (1) using NaNO 2 /Acetic acid lead to isolation of two ring contracted products, namely the 1,4-benzthiazin-derivatives 4 and 5. A reasonable reaction pathway concerning the formation of these compounds is discussed. A simple synthesis of 6-methyI-1,5-benzoxazepin-2,4-3H,5H-dione (13) is described, the transformation of which into the corresponding vic. trione fails, even using a great number of oxidizing procedures. In some cases so far unknown malonic acid derivatives 14, 15 and 16 can be obtained.

Open Access June 2, 2014

Reactions with 5-Arylmethylene-2-phenylhydrazono-4-thiazolidinones A Novel Synthesis of Thiazolo[2,3-c]triazine Derivatives

Sanaa O. Abd Allah, Sherif M. Fahmy, Hamed A. Ead

Page range: 390-392

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Abstract

The 5-arylmethylene derivatives of 2-phenylhydrazono-4-thiazolidinone (1) reacted with phenacyl bromide and with ethyl bromoacetate to yield the thiazolo[2,3-c]triazine derivatives (3) and (4). The reaction of 1 with carbon disulphide in alkaline solution afforded the bis(N 1 - 2-phenylhydrazono-4-thiazolidinone)thiocarbonyl derivatives (6). Cyanoethylation of 1 afforded the N 1 -β-cyanoethylphenylhydrazono derivatives (7).

Open Access June 2, 2014

Über eine thermische Transmethylierungsreaktion bei Flavon-5-methylethern / On a Thermal Transmethylation Reaction with Flavon-5-methylethers

Hans Geiger, Karel Vande Casteele, Christiaan F. Van Sumere

Page range: 393-396

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Abstract

Upon heating to 300 °C partial luteolinemethylethers undergo transmethylation. A reaction mechanisme is put foreward.

Open Access June 2, 2014

Bioactive Polymers, XIV. Immobilization of Ampicillin on BIOZAN R

Cr. Simionescu, M. I. Popa, S. Dumitriu

Page range: 397-402

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Abstract

The ampicillin coupling on BIOZAN R (a polysaccharide of microbial synthesis Xanthomonas campestris) is studied by the activation of carboxylic groups by dicyclohexylcarbodiimide. The following optimum reaction parameters are settled on the basis of an experimental program: time = 7.5 h, temperature = 10 °C, dicyclohexylcarbodiimide concentration = 1.10 -3 mole, ampicilline concentration = 2.4·10 -3 mol. Under these conditions up to 37% of ampicillin with respect to the polymer is coupled. The microbiological and hydrolysis studies under the conditions of the human physiological pH attest the ampicillin maintains its activity and may be released in oral administration.

Open Access June 2, 2014

Notizen: Gezielte Synthese des Thionylkomplexes Fe₃(CO)₉S(SO) durch Oxidation einer Sulfidobrücke in Fe₃(CO)₉S₂ / Directed Synthesis of the Thionyl Complex Fe₃(CO)₉S(SO) by Oxidation of One Sulfido Bridge in Fe₃(CO)₉S₂

Ingo-Peter Lorenz, Johannes Messelhäuser

Page range: 403-404

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Abstract

One of the sulfido bridges in the cluster Fe 3 (CO) 9 S 2 1 is oxidized by meta-chloroperbenzoic acid to give the known thionyl complex Fe 3 (CO) 9 S(SO) 2.

Open Access June 2, 2014

Notizen: Synthese von D-Forosamin aus D-Glucose / Synthesis of D-Forosamine from D-Glucose

Wolfgang Voelter, Abdul Malik, Nighat Afza

Page range: 405-406

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Abstract

A convenient synthesis of the naturally occurring deoxyamino sugar forosamine from glucose as starting material is described. The yields for the intermediates (ethyl-4,6-di-O-toxyl-2,3-dideoxy-α-D-erythro-hex-2-enopyranoside, 4-iodo-2,3,4-tride-oxy-6-O-tosyl-α-D-threo-hex-2-enopyranoside, ethyl 4-azido-2,3,4-trideoxy-6-O-tosyl-α-D-erythro hex-2-enopyranoside, ethyl 4-amino-2,3,4,6-tetradeoxy-α-D-erythro-hexopyranoside) are all in the range between 70 to 80%.

Open Access June 2, 2014

Erratum

Page range: 407-408

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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 39 Issue 3

Issue of Zeitschrift für Naturforschung B

Kristall- und Molekülstrukturen von zwei trans-1.2.4.5-Tetraza-3.6-diphospha-cyclohexan-3.6-disulfiden / Crystal and Molecular Structures of Two trans- 1,2,4,5-Tetraza-3,6-diphospha-cyclohexane-3,6-disulfides

Abstract

Beiträge zur Chemie des Phosphors, 135 [1]. Synthese und Strukturen neuer polycyclischer Organophosphane PnRm (m < n) / Contributions to the Chemistry of Phosphorus, 135 [1]. Synthesis and Structures of Novel Polycyclic Organophosphanes PnRm (m < n)

Abstract

Carboxydiphenylphosphansulfide / Carboxydiphenyl Phosphane Sulfides

Abstract

Fluoride und Fluorosäuren, VI. Verbindungsbildung und Kristallstrukturen im System Ammoniak—Fluorwasserstoff [1, 2] / Fluorides and Fluoro Acids, VI. Compound Formation and Crystal Structures in the System Ammonia-Hydrogen Fluoride

Abstract

Abstract

Phasenbeziehungen im System Schwefel—Chlor sowie Kristallstrukturen von SCl2 und SCl4 [1]. / Phase Relations in the System Sulfur—Chlorine and Crystal Structures of SCl2 and SCl4

Abstract

Die Kristallstruktur des „Indium-Diiodids“ (InIInIIII4) / The Crystal Structure of “Indium -Diiodide” (InIInIIII4)

Abstract

Das Infrarotspektrum von matrixisoliertem SFCl / Infrared Spectrum of Matrix Isolated SFCl

Abstract

Element—Element-Bindungen, III [1]. Intermolekulare Sb···Sb-Wechselwirkungen im kristallinen Tetramethyldistiban1 / Element—Element Bonds, III [1]. Intermolecular Sb···Sb Interactions in Crystalline Tetramethyldistibane

Abstract

Carbonylniobchemie, VII. Die 31P—NMR-Spektren der Phosphinderivate des [Nb(η5-C5H5)(CO)4] / Carbonyl Niobium Chemistry, VII. The 31P NMR Spectra of Phosphine Derivatives of [Nb(η5-C5H5)(CO)4]

Abstract

Crystal Structure and Mössbauer Spectroscopic Investigation of the Low Temperature Molecular Dynamics of Hexa(2-ethylimidazole)iron(II) Hydridotetracarbonylferrate(-II)

Abstract

Atran-analoge Verbindungen des Typs / Atrane Analogous Compounds of the Type

Abstract

Über einige Redox-Reaktionen von Iodgallanen und lodindanen mit organischen Disulfiden / Some Redox Reactions of Iodogallanes and Iodoindanes with Organic Disulfides

Abstract

Reaktionen von Phosphanen MenPH3-n (n = 0—3) mit Hexafluorisopropylidenimin / Reactions of the Phosphanes MenPH3-n (n = 0—3) with Hexafluorisopropylidenimine

Abstract

Abstract

Synthesis of Regio- and Stereospecifically Deuterium Labelled 2-Benzylindanes

Abstract

Abstract

Versuche zur Oxidation von 1.5-Benzothiazepin — bzw. 1.5-Benzoxazepin- 2.4-3H.5H-dionen / Investigations Concerning Oxidation Reactions of 1,5-Benzthiazepin — and 1,5-Benzoxazepin- 2,4-3H,5H -diones

Abstract

Reactions with 5-Arylmethylene-2-phenylhydrazono-4-thiazolidinones A Novel Synthesis of Thiazolo[2,3-c]triazine Derivatives

Abstract

Über eine thermische Transmethylierungsreaktion bei Flavon-5-methylethern / On a Thermal Transmethylation Reaction with Flavon-5-methylethers

Abstract

Bioactive Polymers, XIV. Immobilization of Ampicillin on BIOZAN R

Abstract

Notizen: Gezielte Synthese des Thionylkomplexes Fe3(CO)9S(SO) durch Oxidation einer Sulfidobrücke in Fe3(CO)9S2 / Directed Synthesis of the Thionyl Complex Fe3(CO)9S(SO) by Oxidation of One Sulfido Bridge in Fe3(CO)9S2

Abstract

Notizen: Synthese von D-Forosamin aus D-Glucose / Synthesis of D-Forosamine from D-Glucose

Abstract

Erratum

Beiträge zur Chemie des Phosphors, 135 [1]. Synthese und Strukturen neuer polycyclischer Organophosphane P_nR_m (m < n) / Contributions to the Chemistry of Phosphorus, 135 [1]. Synthesis and Structures of Novel Polycyclic Organophosphanes P_nR_m (m < n)

Phasenbeziehungen im System Schwefel—Chlor sowie Kristallstrukturen von SCl₂ und SCl₄ [1]. / Phase Relations in the System Sulfur—Chlorine and Crystal Structures of SCl₂ and SCl₄

Die Kristallstruktur des „Indium-Diiodids“ (In^IIn^IIII₄) / The Crystal Structure of “Indium -Diiodide” (In^IIn^IIII₄)

Element—Element-Bindungen, III [1]. Intermolekulare Sb···Sb-Wechselwirkungen im kristallinen Tetramethyldistiban¹ / Element—Element Bonds, III [1]. Intermolecular Sb···Sb Interactions in Crystalline Tetramethyldistibane

Carbonylniobchemie, VII. Die ³¹P—NMR-Spektren der Phosphinderivate des [Nb(η⁵-C₅H₅)(CO)₄] / Carbonyl Niobium Chemistry, VII. The ³¹P NMR Spectra of Phosphine Derivatives of [Nb(η⁵-C₅H₅)(CO)₄]

Reaktionen von Phosphanen Me_nPH_3-n (n = 0—3) mit Hexafluorisopropylidenimin / Reactions of the Phosphanes Me_nPH_3-n (n = 0—3) with Hexafluorisopropylidenimine

Notizen: Gezielte Synthese des Thionylkomplexes Fe₃(CO)₉S(SO) durch Oxidation einer Sulfidobrücke in Fe₃(CO)₉S₂ / Directed Synthesis of the Thionyl Complex Fe₃(CO)₉S(SO) by Oxidation of One Sulfido Bridge in Fe₃(CO)₉S₂