Published by De Gruyter

Volume 37 Issue 9

Issue of Zeitschrift für Naturforschung B

Contents
Journal Overview

Open Access June 2, 2014

Reaktionen von Diphenylsulfilimin Ph₂SNH mit Carbonylmetallkomplexen/ Reactions of Diphenylsulfilimine Ph₂SNH with Carbonyl Metal Complexes

Günter Urban, Wolfgang Beck

Page range: 1101-1103

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Abstract

The reaction of the carbonyl metal hydrides (π - C 5 H 5 )M (CO) 3 H(M = Mo, W) with Ph 2 S = XH gives the ainine-isoeyanato compounds (π - C 5 H 5 )(CO) 2 M(NH 3 )NCO. N-Carbaxnoyl-B,S-diphenylsulfilimine Ph 2 S N-C(O) NH 2 has boon isolated from the reaction of the hexacarbonyls M(CO) 6 (M=Cr,Mo) with Ph 2 S = XH. The spectroscopic data (IR, 1 H, 13 C NMR, MS) are reported and the formation of the products is discussed.

Open Access June 2, 2014

Synthese von Tetraorganodistibanen und oxidative Spaltung zu Bis(diorganoantimon)oxiden und -Sulfiden/ Synthesis of Tetraorganodistibanes and Oxidative Cleavage to Bis(diorganoantimony) Oxides and Sulfides

Hans Joachim Breunig, Hussain Jawad

Page range: 1104-1108

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Abstract

The tetraorganodistibanes Pr 4 Sb 2 and Ph 4 Sb 2 were prepared by dehalogenation of the corresponding dioganoantimony bromides with magnesium in tetrahydrofuran. Mass spectra show that the distibanes Me 4 Sb 2 , Et 4 Sb 2 and i-Pr 4 Sb 2 react with air to yield the compounds of the formula R 4 Sb 2 O (R = Me, Et, i-Pr), which are assumed to be bis- (diorganoantimony)oxides. The species (Me 2 Sb) 2 O is also formed by hydrolysis of Me 2 SbBr. Ir and 1 H NMR data of this oxide confirm the proposed structure. The distibanes R 4 Sb 2 (R = Me, Et, Pr, Ph) react quantitatively with sulfur to yield the corresponding bis- (diorganoantimony)sulfides (R 2 Sb) 2 , as derived from ms, NMR and IH data. Ms data of the distibanes R 4 Sb 2 (R = Me, Et, i-Pr, Bu, Ph) are reported and discussed.

Open Access June 2, 2014

Thermische und Photo-induzierte Substitutionsreaktionen an der Eisen-ethyl-Verbindung CpFe(CO)₂Et. Die Molekülstruktur von CpFe(PMe₃)₂COEt (Cp =η⁵-C₅H₅)/ Thermal and Photo-Induced Substitution Reactions of the Iron Ethyl Compound CpFe(CO)₂Et. The Molecular Structure of CpFe(PMe₃)₂COEt (Cp = η⁵-C₅H₅)

H. G. Alt, M. E. Eichner, B. M. Jansen, U. Thewalt

Page range: 1109-1115

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Abstract

The photo-induced reaction of CpFe(CO) 2 Et (1) with either trimethylphosphane or trimethylphosphite (L) in solution results in formation of the substitution products CpFe(CO)(L)Et (3), CpFe(L) 2 Et (5), and the hydrido complexes CpFe(CO)(L)H (4), and CpFe(L) 2 H (0). In contrast, the thermal reaction of 1 with L yields the adduct CpFe(CO)(L)COEt (7) and the dimeric compound Cp 2 Fe 2 (CO) 3 L. Under photochemical conditions, the terminal carbonyl ligand in 7 can be replaced by L to give the derivative CpFe(L) 2 COEt (8). According to a crystal structure determination of CpFe(PMO 3 ) 2 COEt, the complex possesses a η 1 -bonded propionyl ligand. The IR and NMR data, however, are indicative for a η 2 -bonded propionyl ligand.

Open Access June 2, 2014

Metall-Schwefeldioxid -Komplexe/ Metal Sulfur Dioxide Complexes

Reinhard Hoppenheit, Wilhelm Isenberg, Rüdiger Mews

Page range: 1116-1121

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Abstract

The preparation of sulfur dioxide complexes M(SO 2 ) 2 (AsFe) (1 a-1 g M = Mn, Fe, Co, Ni, Cu, Zn, Mg) is possible in liquid SO 2 (a) by oxidation of the metals with AsF 5 , (b) by metathesis of metal halides, e.g. NiBro, with AgAsF 6 , (c) by the reaction of metal fluorides, e.g. ZNF 2 , with AsF 5 . The spectroscopic properties of these complexes are discussed and the structure of [Mg(SO 2 ) 2 (AsF 6 ) 2 ] n (1 g) is reported.

Open Access June 2, 2014

Die Kristallstrukturen von PPh₄[SnCl₃] und PPh₄[SnBr₃]/ The Crystal Structures of PPh₄[SnCl₃] and PPh₄[SnBr₃]

Ulrich Müller, Norbert Mronga, Christina Schumacher, Kurt Dehnicke

Page range: 1122-1126

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Abstract

PPh 4 [SnCl 3 ] and PPh 4 [SnBr 3 ] were prepared by reaction of PPh 4 X with SnX 2 in CH 2 X 2 solutions (X - Cl, Br). The vibrational spectra of the [SnX 3 ] ⊖ ions show three SnX 3 stretching frequencies, which is caused by deviations from the ideal C 3v symmetry. In the crystal structure determinations these deviations show up by slightly different Sn-X bond lengths which are explained by differing hydrogen bridges to phenyl-H atoms. The isotypic crystal structures of both compounds were determined and refined from X-ray diffraction data (R values: 0.042 and 0.034). Although triclinic (space group P1̄), the structures are closely related to the tetragonal AsPh 4 [RuNCl 4 ] structure type. Very pure SnBr 2 is prepared by the reaction of PPh 4 [SnBr 3 ] with AlBr 3 in CH 2 Br 2 solution.

Open Access June 2, 2014

Raman-Matrixspektrum von As₄/ Raman Matrix Spectrum of As₄

Klaus Manzel, Wilfried Schulze, Volker Wölfel, Rolf Minkwitz

Page range: 1127-1128

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Abstract

The laser Raman spectrum of matrix-isolated As 4 -tetrahodra is reported. The frequencies are different to former data obtained by gas-phase measurements.

Open Access June 2, 2014

Darstellung und Kristallstruktur von Kupfer(I)tetrachloroaIuminat, CUAlCl₄/ Preparation and Crystal Structure of Copper(I) Tetrachloroaluminate, CuAlCl₄

Kerstin Hildebrandt, Peter G. Jones, Einhard Schwarzmann, George M. Sheldrick

Page range: 1129-1131

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Abstract

Crystalline CuAlCl 4 was prepared from CuCl and AlCl 3 in a quartz tube at 533 K. The crystal structure was determined [P4̄2c, a = 543.0(1), c = 1009.6(1) pm, Z = 2, R w =0.034 for 345 reflections]. The chlorine atoms form a distorted cubic close-packed lattice, with copper and aluminium each occupying an eighth of the tetrahedral holes (site symmetries 4̄ and 222, respectively).

Open Access June 2, 2014

Neues über Fluoride A[CoF₄] mit A = Li-Cs sowie über CsFeF₄/ News on Fluorides A[CoF₄] with A = Li-Cs and on CsFeF₄

Thomas Fleischer, Rudolf Hoppe

Page range: 1132-1136

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Abstract

By fluorination of CsFeBr 4 · 2 H 2 O we obtained a new modification of CsFeF 4 (a = 12,491(1), c = 13,272(1) A, Z - 20), which according to powder data crystallizes tetragonally in the structure type of β-RbAlF 4 , space group I4̄c2. The same structure type is adapted by CsCoF 4 (a 12,478(1), c = 12,971(1) Å, Z = 20); in contrast RbCoF 4 has similar lattice constants (a = 12,222(1), c = 12,356(2) Å, Z = 20), but another unknown structure; KCoF 4 (a = 7,520(1), b = 7,584(1), c = 5,792(1) Å, Z = 4) crystallizes orthorhombic by isotypic to RbFeF 4 , and NaCoF 4 (a - 4,965(1), b = 5,51(5(1), c = 10,800(2) A, Z = 4) is isotypic to NaTiF 4 . The first compound LiM III F 4 (M III = 3dmetals) is LiCoF 4 , which probably crystallizes monoclinicly (a = 5,540(3), 6 = 4,665(1), c = 5,447(3) Å, = 114,25(5)°, Z = 2). The colour of these cobaltates(III) is violet.

Open Access June 2, 2014

Schwefel-Stickstoff-Verbindungen, XI. Elektrochemische Untersuchung einiger aromatisch substituierter Schwefeldiimide/ Sulfur-Nitrogen Compounds, XI. Electrochemical Investigations on Some Aromatic Substituted Sulfurdiimides

Gilbert Brands, Alfred Golloch

Page range: 1137-1143

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Abstract

The electrochemical reduction and oxidation of sulfurdiimines R 1 -NSN-R 2 (R 1,2 = C 6 H 5 , C 6 F 5 , C 6 H 5 S, C 6 F 5 S) in organic solvents is studied. Both reactions proceed in the sulfur-nitrogen system in a one-electron step. The influences of the substituents are, however, different.

Open Access June 2, 2014

Hydroxo Verbindungen, 11. Zinn(II)-Ethylenglykolat, SnC₂H₄O₂, ein polymerer Chelatkomplex mit 2-fach funktionellem Sauerstoff/ Hydroxy Compounds, 11. Tin(II) Ethylen Glycolate, SnC₂H₄O₂, a Polymerie Chelate Complex with Bi-Functional Oxygen

Reinhard Nesper, Hans Georg von Schnering

Page range: 1144-1145

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Abstract

Tin(II) ethylene glycolate is prepared from freshly precipitated “tin(II)-hydroxide” on heating in ethylene glycol under reflux. The colourless single crystals, slightly distorted cubes, exhibit rhombohedral symmetry (R3̄-C 3i 2 , a h = 1547.7 pm, c n = 871.6 pm, Z = 18). The structure is a 3-dimensional networks of linked tin(II) ethylene glycol chelates.

Open Access June 2, 2014

Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, XXVI. Nickelaphosphacycloalkane unterschiedlicher Ringgröße - Kristallstruktur von[(h⁵-C₅H₅)NiP(C₆H₅)₂CH₂]₂/ Preparation and Properties of, and Reactions with, Metal-Containing Heterocycles, XXVI. Xickelaphosphacycloalkanes with Different Ring Sizes - Crystal Structure of [(h⁵-C₅H₅)NiP(C₆H₅)₂CH₂]₂

Ekkehard Lindner, Faouzi Bouachir, Wolfgang Hiller

Page range: 1146-1154

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Abstract

Substitution of CO in LNi(I)CO (1) (L = h 5 -C 5 H 5 ) by the co-chloro-l-(diphenylphosphino) alkanes Cl-[CH 2 ] n -PR 2 (2a-d) [R = C 6 H 5 ; n = 1(a), 2(b), 3(c), 4(d)] leads to the formation of the intermediates for cyclisation LNi(I)PR 2 -[CH 2 ]nCl (3a-d). When 3a is treated with sodium amalgam, the dimeric phosphino methanide complex [LNiPR 2 CH 2 ] 2 (4′a) is formed. On the basis of an X-ray crystallographic investigation 4'a has a boat conformation and crystallizes monoclinicly in the space group P2 1 /c with Z = 2. The monomeric species (4a) could not be observed. Five- and six-membered I 1 nickelacycloalkanes of the type (4c, d) are obtained by reductive cycloelimination of 3c, d. Because of ring strain the nickelaphosphacyclobutane 4b is not accessible under the necessary cyclisation conditions. Into the Ni-C a bond of 4c, d SO 2 can be inserted to give the cyclic sulfinato complexes (5c, d).

Open Access June 2, 2014

Metallkomplexe mit Tetrapyrrol-Liganden, XXVIII. Mononukleare Nitridomangan(V)-Porphyrine: die ersten Mangan-Stickstoff-Dreifachbindungen/ Metal Complexes with Tetrapyrrole Ligands, XXVIII. Mononuclear Nitridomanganese(V) Porphyrins: the First Manganese Nitrogen Triple Bonds

Johann W. Buchler, Christine Dreher, Kiong Lam Lay

Page range: 1155-1162

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Abstract

The first complexes containing a manganese-nitrogen triple bond, nitrido(octaethylporphinato) manganese(V) [MnN(OEP)]** and nitrido[meso-tetra(p-tolyl)porphinato]manganese( V) [MnN(TTP)], are prepared by hypochlorite oxidation of the corresponding methoxomanganese( III) porphyrins, Mn(OEP)OMe and Mn(TTP)OMe, in the presence of ammonia. The red, pentacoordinated, diamagnetic species are identified by UV/VIS-, IR-, 1 H NMR, and mass spectra. While the isoelectronic oxochromium(IV) or oxomolybdenum( IV) porphyrins behave as weak oxidants or reductants, respectively, the nitridomanganese( V) unit in the square pyramidal environment is chemically remarkably stable.

Open Access June 2, 2014

Studien zum Vorgang der Wasserstoffübertragung, 63. Elektrochemische Herstellung einiger Amalgame und Bestimmung ihrer Potentiale/ Studies on the Occurrence of Hydrogen Transfer, 63. Electrochemical Preparation of Some Amalgams and Measurement of the Potentials

Leopold Horner, Rolf-Erhard Schmitt

Page range: 1163-1168

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Abstract

The amalgams of lithium, sodium, potassium, barium and zinc were prepared electrochemically (potentiostatic and galvanostatic, see Tables I and II). The potentials of these were measured in acetonitrile, THF and DMF, using the corresponding Perchlorate (Li, Na, K, Ba, Zn) or tetrabutylammonium perchlorate as electrolyte and a standard calomel olektrode (SCE) (Table III). In the case of the lithium amalgam, the dependence of the potential on the lithium content was studied (Table IV). The potential moves slightly to more positive values on dilution, dilution by a factor of 100 producing a shift of only ca. 100 mV.

Open Access June 2, 2014

Eliminierung von Aceton und Bildung von protoniertem Aceton bei der chemischen Ionisation von [2.2.6.6]-Tetramethylcyclohexanon/ Elimination of Acetone and Formation of Protonated Acetone from [2,2,6,6]-Tetramethylcyclohexanone under the Condition of Chemical Ionisation

Roland Wolfschütz, Wilfried Franke, Nikolaus Heinrich, Helmut Schwarz, Wolfgang Blum, Wilhelm J. Richter

Page range: 1169-1173

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Abstract

By means of appropriately D and 13 C labelled precursors it is shown that the proton catalysed degradation of [2,2,6,6]-tetramethyl cyclohexanone {e.g. elimination of acetone and formation of protonatecl acetone from [MH] + ) proceeds via two distinct pathways. The energetically favoured one (pathway A, Scheme 1) involves a sequence of [1,2]-methyl migration, ring contraction and methyl migration, whereas the energetically less attractive path B commences with a Wagner-Meerwein ring contraction, followed by hydroxyl and methyl migration. Semi-empirical quantum mechanical calculations (MNDO) are em-ployed to explore computationally relevant parts of the potential energy surface. The syntheses of the specifically 13 C labelled title compounds (1 a, b) are described in detail.

Open Access June 2, 2014

Additionsverbindungen von Methylhalogensiianen und Pyridin bei tiefen Temperaturen/ Addition Compounds of Methylhalogenosilanes and Pyridine at Low Temperatures

Karl Hensen, Reiner Busch

Page range: 1174-1177

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Abstract

By analyzing the melting point diagrams of some methylhalogenosilane-pyridine systems the existance of the stable addition compounds CH 3 SiCl 3 · 2 py, CH 3 SiBr 3 · 2 py, (CH 3 ) 2 SiBr 2 · py, (CH 3 ) 3 SiBr · py was proved. In the systems (CH 3 ) 2 SiCl 2 /py and (CH 3 ) 2 SiBr 2 /py unstable 1:2-complexes are also found. (CH 3 ) 3 SiCl forms no complexes with pyridine.

Open Access June 2, 2014

Phosphonyl- und Phosphinyl-triazene. Elektrophile Substitutionsreaktionen mit Benzol/ Phosphonyl- and Phosphinyl-triazenes. Electrophilic Substitution Reactions with Benzene

Richard Kreher, Reinhard Halpaap

Page range: 1178-1183

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Abstract

The reaction of phosphonyltriazenes with benzene in the presence of aluminiumchloride is involved with the elimination of nitrogen and followed by electrophilic substitution of benzene. The arylation reaction obviously proceeds via the intermediate formation of arene diazonium ions. Phosphinyltriazenes display the same chemical behaviour.

Open Access June 2, 2014

Determination of the Rate Constants of the Reactions CO₂+ OH^– → HCO₃— and Barbituric Acid → Barbiturate Anion +H⁺ Using the Pulse Radiolysis Technique

Man Nien Schuchmann, Clemens von Sonntag

Page range: 1184-1186

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Abstract

The kinetics of the reactions of CO 2 + OH → HCO 3 - (i) and barbituric acid →barbiturate anion + H + (ii) have been remeasured using as a new approach the pulse radiolysis technique with optical and conductivity detection. The rate constants obtained in the present study, k i (21 °C) = 6900 ± 700 M -1 s -1 and k ii (19 °C) = 22 ± 2 s -1 agree within experimental errors with values obtained earlier by other methods.

Open Access June 2, 2014

Synthesen mit aliphatischen Dialdehyden, XXXV. Synthesen mit 1- und 2-Adamantylmalonaldehyd/ Syntheses with Aliphatic Dialdehydes, XXXV. Syntheses with 1- and 2-Adamantyl Malonaldehyde

Christian Reichardt, Ernst-Ulrich Würthwein

Page range: 1187-1195

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Abstract

The reaction of 1- (1) and 2-adamantyl malonaldehyde (2) with suitable electrophiles and nucleophiles yields adainantyl-substituted open-chain (3-5), carbocyclic (6) as well as heterocyclic compounds (7-19) with peculiar properties due to the presence of the lipophilic adamantyl group. The tetrazolo[1,5-a]pyrimidine (16) exhibits a solvent-dependent tetrazolo-azido valence isomerization reaction.

Open Access June 2, 2014

Synthesen von 3-Hydroxy-tetrahydrochinolin-2.4-dionen Syntheses of 3-Hydroxy-tetrahydroquinoline-2,4-diones

Wolfgang Stadlbauer, Thomas Kappe

Page range: 1196-1200

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Abstract

Oxidation of 3-alkyl- and 3-arylsubstituted 4-hydroxy-2-quinolones (1) by irradiation with UV light, reaction with 3-chloro-peroxybenzoic acid or hydrogen peroxide in alkaline solution leads to 3-hydroxy-3-substituted quinoline-2,4-diones (2).

Open Access June 2, 2014

Synthese und herbizide Wirkung von substituierten Phenoxymethylphenoxypropionsäurederivaten/ Synthesis and Herbicidal Effect of Substituted Phenoxymethylphenoxypropionic Acid Derivatives

Manfred Koch, Hermann Bieringer

Page range: 1201-1204

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Abstract

Compounds are herbicides with high activity. Methods for synthesis are reported.

Open Access June 2, 2014

The Principle of Minimum Chemical Distance and the Principle of Minimum Structure Change

C. Jochum, J. Gasteiger, I. Ugi

Page range: 1205-1215

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Abstract

The principle of minimum chemical distance (PMCD) is derived from the general theory of the BE- and R-matrices, and makes precise the vague classical “principle of minimum structure change”. In fact, the PMCD may be seen as the principle of minimum structure change in mathematical terms. It provides a quantitative measure of chemical similarity of isomeric molecular systems. Its applications lie in the fields of correlations of substructures, elucidation of reaction mechanisms, and evaluation of synthetic pathways as is illustrated by examples. The mathematical foundations of the computer assisted application of the PMCD are presented.

Open Access June 2, 2014

Notizen: Anwendungen der Phasentransfer-Katalyse, 22. Notiz über Fest-Flüssig-Reaktionen von Metallcarbonylen/ Applications of Phase Transfer Catalysis, 22. Note on Solid-Liquid Reactions of Metal Carbonyls

Eckehard V. Dehmlow

Page range: 1216-1217

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Abstract

Solid NaNO 2 and an onium salt react with Fe(CO) 5 and Co 2 [(CO) 8 ] in nonpolar solvents yielding Q[Fe(CO) 3 NO] and Q[Co(CO) 4 ] (Q = onium cation)

Open Access June 2, 2014

Übergangsmetall- Carbi n - Komplexe, LXXI. Ein neuer Weg zum Carbinkomplex durch Ein-Stufen-Reaktion von Acylmetallat- Komplex mit Thionylchlorid/ Transit ion Metal Carbyne Complexes, LXXI .A New Way to Carbyne Complex by One-Step Reaction of Acylmetallate Complex with Thionylchloride

Dieter Himmelreich, Ernst Otto Fischer

Page range: 1218-1218

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Abstract

Lithium-pentacarbonyl(diethylaminoacyl)- tungstate reacts with SOCl 2 to give trans-tetracarbonyl (chloro) (diethylaminocarbyne) tungsten.

Open Access June 2, 2014

Equilibria between Sulfur Rings in Carbon Disulfide Solution at Elevated Temperatures

Ralf Steudel, Reinhard Strauss

Page range: 1219-1220

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Abstract

Cyclooctasulfur, S 8 , dissolved in CS 2 reacts at 130-155 °C in sealed ampoules to give S 6 and S7 whose concentrations have been determined by HPLC. The half-time of the reaction is independent of the initial S 8 concentration and decreases from 232 min at 130 °C to 64 min at 150 °C. After long reaction times equilibrium concentrations are observed which are in agreement with the law of mass action. From the temperature dependence of the equilibrium constants the following reaction enthalpies (at 130-155 °C) have been calculated: 3/4S 8 ⇌S 6 ⊿H°=24kJ/mol 7/8S 8 ⇌S 7 ⊿H°=21kJ/mol

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 9

Issue of Zeitschrift für Naturforschung B

Reaktionen von Diphenylsulfilimin Ph2SNH mit Carbonylmetallkomplexen/ Reactions of Diphenylsulfilimine Ph2SNH with Carbonyl Metal Complexes

Abstract

Synthese von Tetraorganodistibanen und oxidative Spaltung zu Bis(diorganoantimon)oxiden und -Sulfiden/ Synthesis of Tetraorganodistibanes and Oxidative Cleavage to Bis(diorganoantimony) Oxides and Sulfides

Abstract

Abstract

Metall-Schwefeldioxid -Komplexe/ Metal Sulfur Dioxide Complexes

Abstract

Die Kristallstrukturen von PPh4[SnCl3] und PPh4[SnBr3]/ The Crystal Structures of PPh4[SnCl3] and PPh4[SnBr3]

Abstract

Raman-Matrixspektrum von As4/ Raman Matrix Spectrum of As4

Abstract

Darstellung und Kristallstruktur von Kupfer(I)tetrachloroaIuminat, CUAlCl4/ Preparation and Crystal Structure of Copper(I) Tetrachloroaluminate, CuAlCl4

Abstract

Neues über Fluoride A[CoF4] mit A = Li-Cs sowie über CsFeF4/ News on Fluorides A[CoF4] with A = Li-Cs and on CsFeF4

Abstract

Schwefel-Stickstoff-Verbindungen, XI. Elektrochemische Untersuchung einiger aromatisch substituierter Schwefeldiimide/ Sulfur-Nitrogen Compounds, XI. Electrochemical Investigations on Some Aromatic Substituted Sulfurdiimides

Abstract

Hydroxo Verbindungen, 11. Zinn(II)-Ethylenglykolat, SnC2H4O2, ein polymerer Chelatkomplex mit 2-fach funktionellem Sauerstoff/ Hydroxy Compounds, 11. Tin(II) Ethylen Glycolate, SnC2H4O2, a Polymerie Chelate Complex with Bi-Functional Oxygen

Abstract

Abstract

Metallkomplexe mit Tetrapyrrol-Liganden, XXVIII. Mononukleare Nitridomangan(V)-Porphyrine: die ersten Mangan-Stickstoff-Dreifachbindungen/ Metal Complexes with Tetrapyrrole Ligands, XXVIII. Mononuclear Nitridomanganese(V) Porphyrins: the First Manganese Nitrogen Triple Bonds

Abstract

Studien zum Vorgang der Wasserstoffübertragung, 63. Elektrochemische Herstellung einiger Amalgame und Bestimmung ihrer Potentiale/ Studies on the Occurrence of Hydrogen Transfer, 63. Electrochemical Preparation of Some Amalgams and Measurement of the Potentials

Abstract

Eliminierung von Aceton und Bildung von protoniertem Aceton bei der chemischen Ionisation von [2.2.6.6]-Tetramethylcyclohexanon/ Elimination of Acetone and Formation of Protonated Acetone from [2,2,6,6]-Tetramethylcyclohexanone under the Condition of Chemical Ionisation

Abstract

Additionsverbindungen von Methylhalogensiianen und Pyridin bei tiefen Temperaturen/ Addition Compounds of Methylhalogenosilanes and Pyridine at Low Temperatures

Abstract

Phosphonyl- und Phosphinyl-triazene. Elektrophile Substitutionsreaktionen mit Benzol/ Phosphonyl- and Phosphinyl-triazenes. Electrophilic Substitution Reactions with Benzene

Abstract

Determination of the Rate Constants of the Reactions CO2+ OH– → HCO3— and Barbituric Acid → Barbiturate Anion +H+ Using the Pulse Radiolysis Technique

Abstract

Synthesen mit aliphatischen Dialdehyden, XXXV. Synthesen mit 1- und 2-Adamantylmalonaldehyd/ Syntheses with Aliphatic Dialdehydes, XXXV. Syntheses with 1- and 2-Adamantyl Malonaldehyde

Abstract

Synthesen von 3-Hydroxy-tetrahydrochinolin-2.4-dionen Syntheses of 3-Hydroxy-tetrahydroquinoline-2,4-diones

Abstract

Synthese und herbizide Wirkung von substituierten Phenoxymethylphenoxypropionsäurederivaten/ Synthesis and Herbicidal Effect of Substituted Phenoxymethylphenoxypropionic Acid Derivatives

Abstract

The Principle of Minimum Chemical Distance and the Principle of Minimum Structure Change

Abstract

Notizen: Anwendungen der Phasentransfer-Katalyse, 22. Notiz über Fest-Flüssig-Reaktionen von Metallcarbonylen/ Applications of Phase Transfer Catalysis, 22. Note on Solid-Liquid Reactions of Metal Carbonyls

Abstract

Übergangsmetall- Carbi n - Komplexe, LXXI. Ein neuer Weg zum Carbinkomplex durch Ein-Stufen-Reaktion von Acylmetallat- Komplex mit Thionylchlorid/ Transit ion Metal Carbyne Complexes, LXXI .A New Way to Carbyne Complex by One-Step Reaction of Acylmetallate Complex with Thionylchloride

Abstract

Equilibria between Sulfur Rings in Carbon Disulfide Solution at Elevated Temperatures

Abstract

Reaktionen von Diphenylsulfilimin Ph₂SNH mit Carbonylmetallkomplexen/ Reactions of Diphenylsulfilimine Ph₂SNH with Carbonyl Metal Complexes

Die Kristallstrukturen von PPh₄[SnCl₃] und PPh₄[SnBr₃]/ The Crystal Structures of PPh₄[SnCl₃] and PPh₄[SnBr₃]

Raman-Matrixspektrum von As₄/ Raman Matrix Spectrum of As₄

Darstellung und Kristallstruktur von Kupfer(I)tetrachloroaIuminat, CUAlCl₄/ Preparation and Crystal Structure of Copper(I) Tetrachloroaluminate, CuAlCl₄

Neues über Fluoride A[CoF₄] mit A = Li-Cs sowie über CsFeF₄/ News on Fluorides A[CoF₄] with A = Li-Cs and on CsFeF₄

Hydroxo Verbindungen, 11. Zinn(II)-Ethylenglykolat, SnC₂H₄O₂, ein polymerer Chelatkomplex mit 2-fach funktionellem Sauerstoff/ Hydroxy Compounds, 11. Tin(II) Ethylen Glycolate, SnC₂H₄O₂, a Polymerie Chelate Complex with Bi-Functional Oxygen

Determination of the Rate Constants of the Reactions CO₂+ OH^– → HCO₃— and Barbituric Acid → Barbiturate Anion +H⁺ Using the Pulse Radiolysis Technique