Published by De Gruyter

Volume 53 Issue 2

Issue of Zeitschrift für Naturforschung B

Contents
Journal Overview

June 2, 2014

Kristallstruktur von MgSO₃·H2_O/Crystal Structure of Mg SO₃·H₂O

Willi Buchmeier, Bernward Engelen, Holger Müller

Page range: 131-134

Abstract

The crystal structure of MgSO 3 ·H 2 O , space group P2 1 /ln, Z = 4, D x = 2.415 g·cm -3 , a = 4.699(1), b = 12.751(3), c = 5.618(1) Å, β = 90.49(3)°, was determined by single crystal X-ray diffraction. MgSO 3 ·H 2 O crystallizes in the MnSO 3 ·H 2 O type. The structure consists of buckled trans layers ∞ [MgSO 3 ·H 2 O], which are built up from strongly distorted MgO 5 (H 2 O) octahedra sharing four equatorial vertices, and of trigonal pyramidal SO 3 2- ions. It is closely related to the structures of orthorhombic MnSeO 3 ·D 2 O and monoclinic ZnSeO 3 ·H 2 O . The Mg-O distances range from 2.051(3) to 2.175(4) Å. The S-O distances (1.543(3), 1.547(3) and 1.493(3) Å) and the O-S-O angles (98.4(2) and 2x 106.0(2)°) correspond to those in MnSO 3 ·H 2 O . The distortion of the MO 5 (H 2 O) octahedra (M = Mg, Mn) and of the SO 3 2- ions is smaller in MgSO 3 ·H 2 O , but with greater deviations from m symmetry. The distances between the H-connected ∞ 2 [MSO 3 ·H 2 O] layers are greater in MgSO 3 ·H 2 O , indicating weaker inter-layer hydrogen bonds. The lateral arrangement of the ∞ 2 [MSO 3 ·H 2 O] layers is nearly the same in both sulfite monohydrates.

June 2, 2014

Synthesis of Spirocyclic Aminosilanes with Electron Withdrawing Substituents at Nitrogen

Markus Wollenweber, Reinhart Keese, Helen Stoeckli-Evans

Page range: 145-148

Abstract

The first synthesis of spirocyclic tetrasulfonamidosilanes is described. According to the X-Ray structure analysis of the most stable tetratosylamidosilane obtained the Silicon is bonded to four Nitrogen atoms in a spirocycle and surrounded by four Oxygen atoms which are located above the planes of the SiN 4 tetrahedron.

June 2, 2014

Synthese und Kristallstruktur des Lanthan-Titanat-Tellurats LaTi(Ti_0,25Te_0,75)O₆ und seine Verwandtschaft mit PbSb₂O₆ und Sr(MnTe)O₆/Synthesis and Crystal Structure of the Lanthanum Titanate Tellurate LaTi(Ti_0.25Te_0.75)O₆ and its Relationship to PbSb₂O₆ and Sr(MnTe)O₆

L. Wulff, Hk. Müller-Buschbaum

Page range: 149-152

Abstract

Single crystals of LaTi(Ti 0.25 Te 0.75 )O 6 have been prepared by solid state reactions. X-ray investigations led to trigonal symmetry, space group C 3 1 -P3 , a = 5.141(10), c = 5.218(10) Å, Z = 1. The compound is characterized by a predominantly ordered distribution of Ti 4+ and Te 6+ . Typical features of the crystal structure are staggered layers containing edge connected TiO 6 and (Ti,Te)O 6 octahedra. The layers are connected by La 3+ ions receiving an octahedral coordination by the surrounding oxygen ions. The relationships to the PbSb 2 O 6 type and the recently described compound Sr(MnTe)O 6 are discussed.

June 2, 2014

Oxochlorierung von Übergangsmetall-Komplexen mit Thionylchlorid/Oxochlorination of Transition Metal Complexes with Thionyl Chloride

Carola Stoll, Ingo-Peter Lorenz, Heinrich Nöth, Thomas Seifert

Page range: 153-156

Abstract

The reaction of the transition metal complexes CpV(CO) 4 and [CpMo(CO) 3 ] 2 with thionyl chloride affords the oxodichlorides CpM(O)Cl 2 (M = V, Mo) by oxidative decarbonylation. The X-ray structure analysis of CpV (O)Cl 2 shows the pseudo tetrahedral “piano-stool” configuration for the central vanadium atom.

June 2, 2014

Ag₂Cs[B₁₅O₂₄]: Ein wasserfreies quaternäres Silber(I)-Borat mit einem neuartigen Boratanion mit helixartigem Aufbau / Ag₂Cs[B₁₅O₂₄]: An Anhydrous Quaternary Silver(I)-Borate with a New Helical Borate Anion

A. Wiesch, K. Bluhm

Page range: 157-160

Abstract

Single crystals of Ag 2 Cs[B 15 O 24 ] were prepared by using a B 2 O 3 flux technique with Ag 2 CO 3 and Cs 2 CO 3 in a closed silver tube at 650 °C. X-Ray investigations led to a new crystal structure in the space group P 2 1 2 1 2 (Nr. 18) with lattice parameters a = 1778.7 (4); b = 2219.2 (4); c = 512.2 (1) pm, Z = 4. The silver atoms are part of distorted AgO 4 tetrahedra and planar AgO 3 units while the caesium atoms are eightfold coordinated by oxygen. The compound contains an as yet unknown borate anion [B 15 O 24 ] with twelve BO 3- and three BO 4 units per formula. The BO 3 units are connected to eight cords twisted to helices which are combined via BO 4 tetrahedra to a three dimensional framework with large tunnels occupied by the cations.

June 2, 2014

Synthese und Charakterisierung des Fulleren-Kokristallisats C₆₀SiH(C₆H₅)₃/Synthesis and Characterisation of the Fullerene Co-Crystal C₆₀SiH(C₆H₅)₃

G. Waidmann, M. Jansen

Page range: 161-164

Abstract

A new fullerene co-crystal C 60 *SiH(C 6 H 5 ) 3 has been synthesized by crystallisation from a melt of SiH(C 6 H 5 ) 3 and C 60 in sealed duran tubes at 80°C. X-ray investigations led to triclinic symmetry, space group P1̄, a = 10.086(1), b = 14.431(2), c = 14.911(2) Å, α = 79.13(1), β = 74.943(9), γ = 88.33(1)°, V = 2058.0(4) Å 3 , Z = 2. The crystal structure consists of isolated fullerene and silane molecules. At -80°C, C 60 is still rotationally disordered. Temperature dependent Guinier powder diagrams do not show any phase transformation between 25 and -165°C. The compound is stable in air.

June 2, 2014

Oligomere Tetraeder-Anionen in Borophosphaten: Darstellung und Kristallstrukturen von NaFe[BP₂O₇(OH)₃] und K₂Fe₂[B₂P₄O₁₆(OH)₂ ]/Oligomeric Tetrahedral Anions in Borophosphates: Synthesis and Crystal Structures of NaFe[BP₂O₇(OH)₃] and K₂Fe₂[B₂P₄O₁₆(OH)₂]

Insan Boy, Gerhard Cordier, Brigitte Eisenmann, Rüdiger Kniep

Page range: 165-170

Abstract

Crystals of the title compounds were grown under hydrothermal conditions. The crystal structures were determined by single crystal data. NaFe[BP 2 O 7 (OH) 3 ] (monoclinic, C 2/c, a = 1042.0(2), b = 821.5(1), c = 921.7(1) pm, β = 116.60(1)°, Z=4): The crystal structure contains isolated anions [BP 2 O 7 (OH) 3 ] 4- , which correspond to trinuclear units PO 1/2 O 3 -BO 2/2 (OH) 2 -PO 1/2 O 2 (OH) of corner sharing tetrahedra. Fe 3+ is coordinated octahedrally by oxygen, Na + is 8 -fold coordinated by oxygen forming cubes. K 2 Fe 2 [B 2 P 4 O 16 (OH) 2 ] (triclinic, P1̄, a = 516.7(1), b = 808.9(1), c = 834.0(1) pm, α = 87.06(f), β = 80.21(1), γ = 86.59(1)°, Z = 1): The crystal structure contains isolated anions [B 2 P 4 O 16 (OH) 2 ] 8- . Four-membered rings of tetrahedra with two additional terminal phosphate groups are formed by condensation of two trinuclear units P O 1/2 O 3 -BO 3/2 (OH) -PO 2/2 O 2 . Fe 3+ is in an octahedral and K + in an irregularly 10-fold coordination by oxygen.

June 2, 2014

(Triphenylarsine)gold(I) Complexes: Synthesis of an Oxonium Salt and Redistribution of the Arsine Ligands

Upendra M. Tripathi, Annette Schier, Hubert Schmidbaur

Page range: 171-174

Abstract

The reaction of [(Ph 3 As)AuCl] with Ag 2 O in the presence of NaBF 4 in tetrahydrofuran affords three products, identified as [(Ph 3 As) 4 Au]BF 4 (40.3%), [(Ph 3 As) 2 Au]BF 4 (16.4%) and {[(Ph 3 As)Au] 3 O}BF 4 (17.3%). The properties of the main product agree well with recent literature data. The other two compounds are new and have been identified by their analytical, spectroscopic, and crystallographic data. The structures are isomorphous with those of the analogous Ph 3 P complexes. Variations in the stabilities are discussed in terms of kinetic and thermodynamic effects.

June 2, 2014

Thermische Zersetzung und Lösungskalorimetrie von Ammoniumneodymchloriden/Thermal Decomposition and Solution Calorimetry of Ammonium Neodymium Chlorides

C. Hennig, H. Oppermann

Page range: 175-183

Abstract

The thermodynamical data of ammonium neodymium chlorides (NH 4 ) 2 NdCl 5 and NH 4 Nd 2 Cl 7 were derived by the determination of their decomposition equilibria by total pressure measurements. Moreover, solution calorimetry was applied. The enthalpies of formation of these phases were calculated from their heats of solution and from the enthalpies of formation and the heats of solution of NdCl 3 and NH 4 Cl. Data by total pressure measurement: ΔH° B ((NH 4 ) 2 NdCl 5,f,298 ) = - 412,5 ± 3,6 kcal/mol; S°((NH 4 ) 2 NdCl 5 f 298 ) = 80,1 ± 5,8 cal/K · mol; ΔH° B (NH 4 Nd 2 Cl 7,f,298 ) = -579,5 ± 3,5 kcal/mol; S°(NH 4 Nd 2 Cl 7,f,298 ) 101,8 ± 5,6 cal/K mol. Data by solution calorimetry: ΔH° B (NdCl 3,f,298 ) = -251,2 ± 0,7 kcal/mol; ΔH° B ((NH 4 ) 2 NdCl 5,f,298 ) = -405,5 ± 1,0 kcal/mol; ΔH° B (NH 4 Nd 2 Cl 7,f, 298 ) = -576,8 ± 1,7 kcal/mol.

June 2, 2014

Zum Chemischen Transport von Rhenium und Rheniumoxiden/On the Chemical Transport of Rhenium and Rhenium Oxides

J. Feller, H. Oppermann, M. Binnewies, E. Milke

Page range: 184-190

Abstract

Synthesis and single crystal growth by chemical transport reactions of rhenium and rhenium oxides is reported. Several transport agents like the mercury halides HgCl 2 , HgBr 2 , HgI 2 , tellurium tetrachloride and iodine have been employed the transport of the rhenium compounds. Mass spectrometric experiments gave informations about the composition of the gas phase. The transport reactions were traced by calculations based on the knowledge of the gas phase species and their thermodynamical data.

June 2, 2014

Metallkomplexe mit biologisch wichtigen Liganden, XCVIII Cyclopalladierte Schiff-Basen von α-Aminosäure- und Peptidestern/Metal Complexes of Biologically Important Ligands, XCVIII Cyclopalladated Schiff Bases of α-Amino Acid and Peptide Esters

Andreas Böhm, Bernhard Schreiner, Norbert Steiner, Reinhold Urban, Karlheinz Sünkel, Kurt Polborn, Wolfgang Beck

Page range: 191-205

Abstract

The reactions of Schiff bases from benzophenone and α-amino acid and peptide esters with tetrachloropalladate afford the chloro bridged ortho palladated complexes 1-8 and 11-18. The chloro bridges are cleaved by P and N donors (PR 3 , pyridine, α-amino acid ester) to give the monomeric complexes 19-35. From 1, 2, 3 and bidendate ligands (dppe, α-amino carboxylates, cysteine methyl ester) the bis(chelates) 36-41, with N-diphenylmethylene glycylglycine ester the C,N,N chelates 46 and 47 are obtained. The complexes 14, 23 and 47 were characterized by X-ray diffraction. Due to the two neighbouring five membered chelate rings in 47 a considerable distortion from the square planar coordination is observed.

June 2, 2014

Kristallstrukturen der iodierten closo-Hexaborate trans-(Ph₄P)₂[B₆H₄I₂], mer-(Ph₄P)₂[B₆H₃I₃] · 2 CH₂Cl₂, trans-(Ph₄P)₂[B₆H₂I₄] · 2 CH₃CN und (CH₂Py₂)[B₆HI₅]/Crystal Structures of the Iodized closo-Hexaborates trans-(Ph₄P)₂[B₆H₄I₂], mer-(Ph₄P)₂[B₆H₃I₃] · 2 CH₂Cl₂, trans-(Ph₄P )₂[B₆H₂I₄] · 2 CH₃CN and (CH₂Py₂)[B₆HI₅]

D. Sonnak, W. Preetz

Page range: 206-210

Abstract

X-ray structure determinations have been performed on single crystals of trans-(Ph 4 P) 2- [B 6 H 4 I 2 ] (1) (triclinic, space group P1̄, a = 9.9680(12), b = 10.9690(11), c = 11.0470(14) Å,α = 88.167(9), β = 80.466(12), γ = 68.839(11)°, Z = 1), mer-(Ph 4 P) 2 [B 6 H 3 I 3 ] · 2 CH 2 Cl 2 (2)(triclinic, space group P1̄, a = 11.8694(11), b = 15.1699(13), c = 17.051(2) Å, α = 75.118(9), β = 71.953(10), γ = 69.331(8)°, Z = 2), trans-(Ph 4 P ) 2 [B 6 H 2 I 4 ] · 2 CH 3 CN (3) (monoclinic, space group P2 1 /n, a = 14.9665(10), b = 7.6783(10), c = 23.385(3) Å, β = 95.78(9)°, Z = 2), and (CH 2 Py 2 )[B 6 HI 5 ] (4) (orthorhombic, space group Pnma, a = 13.660(2), b = 11.8711(13), c = 13.839(2) Å, Z = 4). The B 6 octahedra are compressed in the direction of the B-I bonds, resulting in shortened diagonal B ··· B distances with average values of the groups I-B ··· B-I = 2.37 and I-B ··· B-H = 2.43 Å as compared with H-B ··· B-H = 2.49 Å.

June 2, 2014

Enantioselektive Katalyse, XVIII Der Einfluß nicht koordinierter Stereozentren auf die enantioselektive Hydrierung/Enantioselective Catalysis, XVIII The Influence of Non-Coordinated Stereocenters on the Enantioselective Hydrogenation

Ulrich Nagel, Christoph Roller

Page range: 211-223

Abstract

3,4-Bis{[2-(methyl-phenyl-oxophosphanyl)-ethyl]phenyl-phosphanyl}pyrrolidines have been synthesized by Michael Addition from the corresponding methyl-phenyl-vinyl-phosphane oxides and 3,4-bis(phenylphosphino)pyrrolidines. For purification of the ligands palladium complexes were used and with the enantiomerically pure ligands Rh complexes have been prepared. The catalyst has 6 stereogenic centers. In the hydrogenation of Z-α-acetamidocinnamic acid all six stereogenic centers have an influence on the enantioselectivity. The influence is strongest from the C stereocenters of the pyrrolidine ring. Less important are the stereogenic centers on the coordinated P atoms. The influence of the stereocenters on the non-coordinated P = O groups is the least, but it is not negligible. The ee values obtained with the ligands containing P = O groups are much lower than those obtained with ligands which are substituted only with aryl groups. Ketones are hydrogenated with only low ee’s.

June 2, 2014

Photoreactivity of Titanocene Pentasulfide

Horst Kunkely, Arnd Vogler

Page range: 224-226

Abstract

The electronic spectrum of Cp 2 TiS 5 shows a long-wavelength absorption at λ max = 492 nm which is assigned to the lowest-energy S 5 2- → Ti IV ligand-to-metal charge transfer (LMCT) transition. The photolysis of the complex in CH 2 CI 2 leads to the formation of Cp 2 TiCl 2 and elemental sulfur. It is suggested that LMCT excitation initiates a reductive elimination with the extrusion of S 5 while the reduced titanocene is reoxidized by the solvent.

June 2, 2014

Darstellung und Schwingungsspektren von cis- und trans-[OsXY(acac)₂], X ≠ Y = Cl, Br, I sowie Normalkoordinatenanalyse von trans-[OsClBr(acac)₂]/Synthesis and Vibrational Spectra of cis- and trans-[OsXY(acac)₂], X ≠ Y = Cl, Br, I, and Normal Coordinate Analysis of trans-[OsClBr(acac)₂]

K. Dallmann, W. Preetz

Page range: 227-231

Abstract

In the reaction of K 2 [OsX 3 Y 3 ] with boiling water/acetylacetone (1:1) the six mixed complexes cis-and trans-[OsX 2 (acac) 2 ] (X ≠ Y = Cl, Br, I) are formed, which have been purified by column chromatography with toluene on silica gel. The IR and Raman spectra (10K) show the intraligand vibrations of the acac groups with nearly constant frequencies and the stretching vibrations of OsO in the range 460-696, of OsCl at 315-345, of OsBr at 210-225, and of Osl at 160-175 cm -1 . A normal coordinate analysis based on a modified valence force field was performed for trans-[OsClBr(acac) 2 ] and the vibrational modes have been assigned. With a set of 32 force constants, taking into account the intraligand vibrations, a good agreement between observed and calculated frequencies has been achieved. The valence force constants are f d (OsCl • ) = 1.75, f d (OsBr′) = 1.63 and f d (OsO) = 3.27 mdyn/Å.

June 2, 2014

Darstellung, Kristallstruktur, Schwingungsspektren und Normalkoordinatenanalyse von [Os(acac)₃]/ Synthesis, Crystal Structure, Vibrational Spectra, and Normal Coordinate Analysis of [Os(acac)₃]

K. Dallmann, W. Preetz

Page range: 232-238

Abstract

In the reaction of K 2 [OsCl 6 ] with boiling water/acetylacetone (1:1) a mixture of different chloro-acetylacetonato complexes is formed, from which [Os(acac) 3 ] can be isolated by column chromatography with dichloromethane on silica gel. The crystal structure of [Os(acac) 3 ] (monoclinic, space group P2 1 /c,a = 13.968(5), b = 7.517(5), c = 16.455(5) Å ,β = 98.939(5)°, Z = 4) has been determined by single crystal X-ray diffraction analysis. High resolution IR and Raman spectra were measured at low temperature (10K). Based on the molecular parameters of the X-ray structure determination a normal coordinate analysis has been performed and the normal modes of vibration have been assigned. With a set of 32 force constants, taking into account the intraligand vibrations, a good agreement between observed and calculated frequencies has been achieved. The valence force constants are f d (OsO) = 3.19 and f d (OC) = 6.74 mdyn/Å.

June 2, 2014

Synthese und Kristallstruktur von [H₂NMe₂]⁺[(Me₂NH)₂ TiCl₄]^-/Synthesis and Crystal Structure of [H₂NMe₂]⁺[(Me₂NH)₂TiCl₄]^-

Regina Bettenhausen, Wolfgang Milius, Wolfgang Schnick

Page range: 239-241

Abstract

The title compound has been synthesized as a green solid by the reaction of MeCl 2 SiNHSiMe 3 and Ti(NMe 2 ) 4 in CH 2 Cl 2 . The crystal structure was determined by single crystal X-ray methods at room temperature (C2/c, a = 1825,7(4), b = 909,9(2), c = 1116,1(2) pm, β = 125,09(3)°, Z = 4,R1= 0,047, wR2 = 0,147) to be an ionic salt [H 2 NMe 2 ] + [(Me 2 NH) 2 TiCl 4 ] - . The central titanium(III) atom of the anion is bound to four Cl atoms and weakly coordinated by two Me 2 NH ligands.

June 2, 2014

18-Krone-6 und kleine Carbonsäuren. Bildung und Struktur binärer Addukte mit Ameisen-und Essigsäure sowie ternärer mit Essigsäure und Wasser/18-Crown-6 and Small Carboxylic Acids. Formation and Structure of Binary Adducts with Formic and Acetic Acid, as well as Ternary Ones with Acetic Acid and Water

Antje Albert, Dietrich Mootz

Page range: 242-248

Abstract

The melting diagrams of the binary systems 18-crown-6/formic acid and 18-crown-6/acetic acid have been set up and the crystal structures of the adducts 18C6 · 2 HCOOH (1, space group P 2 1 /c with Z = 2 formula units per unit cell) and 18C6 · 2 CH 3 COOH (2, C2/m, Z = 2) determined. Furthermore three ternary phases, 18C6 · CH 3 COOH · H 2 O (3, P2 1 /c, Z = 4) and dimorphic 18C6 · 2 CH 3 COOH · 4 H 2 O (high temperature form 4, P2 1 /n, Z = 2; low temperature form 5, P2 1 /n, Z = 2) have been characterized in the same way. In each structure the crown ether molecule has the (pseudo) D 3d conformation common for many of its complexes. Various aspects of the intermolecular hydrogen bonding are described.

June 2, 2014

The Promotive Properties of Alkali Metal Nitrate Melts for the Partial Oxidation of Methane to Methanol

Bor-Jih Lee, Shigeo Kitsukawa, Shukuji Asakura, Kenzo Fukuda

Page range: 249-255

Abstract

(Na, K)NO 3 melts of various ratios were used as promoters for the partial oxidation of methane to methanol. Experiments were performed in a flow reactor system under atmospheric pressure and at various temperatures in the range of 525-600 °C. The influence of reaction temperature, melt composition, and reduced oxygen species on methane conversion and methanol selectivity were investigated systematically. The major reaction products were CH 3 OH, CO, CO 2 , and trace amounts of C 2 H 6 and C 2 H 4 . A methane conversion of 1.8-12.4% and a methanol selectivity of 0.4-14.1% were obtained under these reaction conditions. Binary melts could achieve higher methanol selectivity than a single melt. The amounts of reduced oxygen species O 2 - and O 2 2- were estimated from thermochemical data according to the ion equilibrium in molten nitrates. The promotive effect of nitrate melts was confirmed and the results indicate that superoxide O 2 - plays an important role for methanol formation.

June 2, 2014

Interaction of the Vanadyl(IV) Cation with L-Ascorbic Acid and Related Systems

E. G. Ferrer, P. A . M. Williams, E. J. Baran

Page range: 256-262

Abstract

The interaction of VO 2+ with L-ascorbic acid and dehydroascorbic acid was investigated by electronic spectroscopy in solution at different pH values. In the case of ascorbic acid, two different solid complexes containing one or two monodeprotonated ascorbate ligands could be isolated and characterized. With dehydroascorbic acid, interaction begins at pH = 4 but at higher pH values the ligand is hydrolysed irreversibly, generating 2,3-diketogulonic acid. A solid complex containing this ligand could be precipitated at pH = 7. Its spectroscopic behavior confirms the interaction of the cation with an enolised form of the acid.

June 2, 2014

Untersuchungen an Polyhalogeniden, XXXIV Cäsium(18-Krone-6)dichloroiodat, [Cs(C₁₂H₂₄O₆)]ICl₂/Studies on Polyhalides, XXXIV Cesium (18 -crown -6 )dichloroiodate, [Cs(C₁₂H₂₄O₆)]ICl₂

Mervat El Essawi, Karl-Friedrich Tebbe

Page range: 263-266

Abstract

The new compound [Cs(18-crown-6)]ICl 2 has been prepared by the reaction of cesium chloride and 18-crown-6 with iodine chloride in ethanol and structurally characterized by X-ray diffraction methods. The geometries of the cation [Cs(18-crown-6)] + and of the anion ICl 2 - are as expected.

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)

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Volume 53 Issue 2

Issue of Zeitschrift für Naturforschung B

Kristallstruktur von MgSO3·H2O/Crystal Structure of Mg SO3·H2O

Abstract

Synthesis of Spirocyclic Aminosilanes with Electron Withdrawing Substituents at Nitrogen

Abstract

Synthese und Kristallstruktur des Lanthan-Titanat-Tellurats LaTi(Ti0,25Te0,75)O6 und seine Verwandtschaft mit PbSb2O6 und Sr(MnTe)O6/Synthesis and Crystal Structure of the Lanthanum Titanate Tellurate LaTi(Ti0.25Te0.75)O6 and its Relationship to PbSb2O6 and Sr(MnTe)O6

Abstract

Oxochlorierung von Übergangsmetall-Komplexen mit Thionylchlorid/Oxochlorination of Transition Metal Complexes with Thionyl Chloride

Abstract

Ag2Cs[B15O24]: Ein wasserfreies quaternäres Silber(I)-Borat mit einem neuartigen Boratanion mit helixartigem Aufbau / Ag2Cs[B15O24]: An Anhydrous Quaternary Silver(I)-Borate with a New Helical Borate Anion

Abstract

Synthese und Charakterisierung des Fulleren-Kokristallisats C60*SiH(C6H5)3/Synthesis and Characterisation of the Fullerene Co-Crystal C60*SiH(C6H5)3

Abstract

Oligomere Tetraeder-Anionen in Borophosphaten: Darstellung und Kristall­strukturen von NaFe[BP2O7(OH)3] und K2Fe2[B2P4O16(OH)2 ]/Oligomeric Tetrahedral Anions in Borophosphates: Synthesis and Crystal Structures of NaFe[BP2O7(OH)3] and K2Fe2[B2P4O16(OH)2]

Abstract

(Triphenylarsine)gold(I) Complexes: Synthesis of an Oxonium Salt and Redistribution of the Arsine Ligands

Abstract

Thermische Zersetzung und Lösungskalorimetrie von Ammoniumneodymchloriden/Thermal Decomposition and Solution Calorimetry of Ammonium Neodymium Chlorides

Abstract

Zum Chemischen Transport von Rhenium und Rheniumoxiden/On the Chemical Transport of Rhenium and Rhenium Oxides

Abstract

Metallkomplexe mit biologisch wichtigen Liganden, XCVIII Cyclopalladierte Schiff-Basen von α-Aminosäure- und Peptidestern/Metal Complexes of Biologically Important Ligands, XCVIII Cyclopalladated Schiff Bases of α-Amino Acid and Peptide Esters

Abstract

Abstract

Enantioselektive Katalyse, XVIII Der Einfluß nicht koordinierter Stereozentren auf die enantioselektive Hydrierung/Enantioselective Catalysis, XVIII The Influence of Non-Coordinated Stereocenters on the Enantioselective Hydrogenation

Abstract

Photoreactivity of Titanocene Pentasulfide

Abstract

Darstellung und Schwingungsspektren von cis- und trans-[OsXY(acac)2], X ≠ Y = Cl, Br, I sowie Normalkoordinatenanalyse von trans-[OsClBr(acac)2]/Synthesis and Vibrational Spectra of cis- and trans-[OsXY(acac)2], X ≠ Y = Cl, Br, I, and Normal Coordinate Analysis of trans-[OsClBr(acac)2]

Abstract

Darstellung, Kristallstruktur, Schwingungsspektren und Normalkoordinatenanalyse von [Os(acac)3]/ Synthesis, Crystal Structure, Vibrational Spectra, and Normal Coordinate Analysis of [Os(acac)3]

Abstract

Synthese und Kristallstruktur von [H2NMe2]+[(Me2NH)2 TiCl4]-/Synthesis and Crystal Structure of [H2NMe2]+[(Me2NH)2TiCl4]-

Abstract

Abstract

The Promotive Properties of Alkali Metal Nitrate Melts for the Partial Oxidation of Methane to Methanol

Abstract

Interaction of the Vanadyl(IV) Cation with L-Ascorbic Acid and Related Systems

Abstract

Untersuchungen an Polyhalogeniden, XXXIV Cäsium(18-Krone-6)dichloroiodat, [Cs(C12H24O6)]ICl2/Studies on Polyhalides, XXXIV Cesium (18 -crown -6 )dichloroiodate, [Cs(C12H24O6)]ICl2

Abstract

Kristallstruktur von MgSO₃·H2_O/Crystal Structure of Mg SO₃·H₂O

Synthese und Kristallstruktur des Lanthan-Titanat-Tellurats LaTi(Ti_0,25Te_0,75)O₆ und seine Verwandtschaft mit PbSb₂O₆ und Sr(MnTe)O₆/Synthesis and Crystal Structure of the Lanthanum Titanate Tellurate LaTi(Ti_0.25Te_0.75)O₆ and its Relationship to PbSb₂O₆ and Sr(MnTe)O₆

Ag₂Cs[B₁₅O₂₄]: Ein wasserfreies quaternäres Silber(I)-Borat mit einem neuartigen Boratanion mit helixartigem Aufbau / Ag₂Cs[B₁₅O₂₄]: An Anhydrous Quaternary Silver(I)-Borate with a New Helical Borate Anion

Synthese und Charakterisierung des Fulleren-Kokristallisats C₆₀SiH(C₆H₅)₃/Synthesis and Characterisation of the Fullerene Co-Crystal C₆₀SiH(C₆H₅)₃

Oligomere Tetraeder-Anionen in Borophosphaten: Darstellung und Kristallstrukturen von NaFe[BP₂O₇(OH)₃] und K₂Fe₂[B₂P₄O₁₆(OH)₂ ]/Oligomeric Tetrahedral Anions in Borophosphates: Synthesis and Crystal Structures of NaFe[BP₂O₇(OH)₃] and K₂Fe₂[B₂P₄O₁₆(OH)₂]

Darstellung und Schwingungsspektren von cis- und trans-[OsXY(acac)₂], X ≠ Y = Cl, Br, I sowie Normalkoordinatenanalyse von trans-[OsClBr(acac)₂]/Synthesis and Vibrational Spectra of cis- and trans-[OsXY(acac)₂], X ≠ Y = Cl, Br, I, and Normal Coordinate Analysis of trans-[OsClBr(acac)₂]

Darstellung, Kristallstruktur, Schwingungsspektren und Normalkoordinatenanalyse von [Os(acac)₃]/ Synthesis, Crystal Structure, Vibrational Spectra, and Normal Coordinate Analysis of [Os(acac)₃]

Synthese und Kristallstruktur von [H₂NMe₂]⁺[(Me₂NH)₂ TiCl₄]^-/Synthesis and Crystal Structure of [H₂NMe₂]⁺[(Me₂NH)₂TiCl₄]^-

Untersuchungen an Polyhalogeniden, XXXIV Cäsium(18-Krone-6)dichloroiodat, [Cs(C₁₂H₂₄O₆)]ICl₂/Studies on Polyhalides, XXXIV Cesium (18 -crown -6 )dichloroiodate, [Cs(C₁₂H₂₄O₆)]ICl₂