"Phosphorus, Sulfur, and Silicon and the Related Elements"

Steudel, Ralf

doi: 10.1080/10426509208055304pmid: N/A

doi: 10.1080/10426509208055303pmid: N/A

Abstract This is a scanned image of the original Editorial Board page(s) for this issue.

Püttmann, Christian; Diercks, Harald; Krebs, Bernt

doi: 10.1080/10426509208055305pmid: N/A

Abstract The thioborates M3B3S6 (M = Na1,2, K1,2, Rb) and LiSrB3S6 were prepared from stoichiometric amounts of the metal sulfides, boron and sulfur. The crystal data for the isotypic M3B3S6, (M = Na, K, Rb) compounds are: space group R3c; a = 15.118(1), 15.520(5), 15.813(4) Å; c = 7.512(1), 8.424(3), 8.804(1) Å (hexagonal). The crystal data for the first quarternary thioborate LiSrB3S6 are: space group Cc; a = 14.933(6), b = 8.703(4), c = 7.866(3) Å, β = 116.76(3)°. All four metathioborates contain isolated B3S2 3- anions which form B3S3 rings with three exocyclic sulfur atoms.

Drost, Christian; Klingebiel, Uwe

doi: 10.1080/10426509208055306pmid: N/A

Abstract Dilithium derivatives of hydrazines react with fluorosilanes to yield fluorosilylhydrazines. Cyclic fluorosilylhydrazines are formed when these compounds are reacted again with dilithiated hydrazines. Starting with lithium derivatives of stable fluorosilylhydrazines hydrogenfunctional six-membered rings are formed by intermolecular Lifelimination. Reaction and X-ray analyses of both ring systems are discussed.

Swamy, K. C. Kumara; Nagabrahmanandachari, S.

doi: 10.1080/10426509208055307pmid: N/A

Abstract Thermal behaviour and possible uses of the newly characterized monoorganotin cages and clusters (e.g. In catalyzing esterification, polymerization) are discussed.

Schäfer, Annemarie; Weidenbruch, Manfred

doi: 10.1080/10426509208055308pmid: N/A

Abstract Thermolysis of hexakis(2,4,6-triisopropylphenyl)cyclotristannane 1 generates tetrakis(2,4,6-triisopropylphenyl)distannene 3 which can be trapped by various reagents. Addition of phenylacetylene to 3 yields a 1,2-distannacyclobutene derivative. Reaction of 3 with tellurium and selenium leads to tellura- and selenadistanniranes, 7,9, with an excess of these chalcogens the 1,3-dichalcogenadistannetanes, 8,10, are formed. With elemental sulfur the 1,3-dithiadistaetane 12 along with the 1,2-dithiadistanneta-ne 13 is formed. Thiadistannirane 11, which is not accessible by this route, is, however, smoothly obtained by reaction of 3 with methylthiirane.

Veith, M.; Detemple, A.

doi: 10.1080/10426509208055309pmid: N/A

Abstract After studying the reactivity of the base-stabilized germanimine (MeSi) 2 (NtBu) 4 Ge=NSiMe3 1 and germanethione (MeSi)2(NtBu)4Ge=S 2 towards simple polar molecules, we were interested in their cyclo-addition chemistry. 1 gives no reaction with ketones (e. g. benzophenone) and dienes (e. g. 2,3-dimethylbutadiene). The reaction of 1 with an excess of CS2 gives 2 and trimethylsilylisothiocya-nate 4. 2 reacts with the dichlorocarbene to give the bis(amino)dichlorogermane 5.

Belaj, Ferdinand; Nachbaur, Edgar; Popitsch, Alois; Janoschek, Rudolf

doi: 10.1080/10426509208055310pmid: N/A

Abstract Crystal structures of 1,3-dichloro-1,3-diazetidine-2,4-dione (1) and 1,3-bis(trimethylsilyl) -'1,3-diazetidine-2,4-dione (2) have been determined by X-ray crystallography, and new infrared and Raman data of 1 have been recorded in the solid state, leading to revised and complete fundamental frequency assignments. Both compounds show a planar ring with a trans-configuration of the substituents X [X = -Cl, -Si(CH3)3]. The angles between the C-N-C plane and the exocyclic N-X bond are quite different: 32.5(1)° in 1 and 2.5(2)° and 0.8(2)° in 2. These values are extremes referring to the known structural data of 1,3-diazetidine-2,4-diones. A normal coordinate analysis together with ab initio and semi-empirical calculations have been performed for 1 in order to support the vibrational assignments. The general valence force field confirms the revised frequency assignments. For discussion of the coupling phenomena in this molecule, the normal modes of vibration are plotted in terms of atomic displacements.

Stüger, H.; Eibl, M.; Kovacs, I.

doi: 10.1080/10426509208055311pmid: N/A

Abstract Group VI heterocyclopolysilanes have been synthesized from α, ω-dichloropolysilanes and Li2S/Li2 Se or by simple hydrolysis. Si-Si NMR coupling constants correlate satisfactorily with electronegativities of the heteroelements indicating dominant Fermi contact contributions.

Voronkov, Mikhail; Yarosh, Oleg; Zhilitskaya, Larisa

doi: 10.1080/10426509208055312pmid: N/A

Abstract A series of 12-, 15-, 18-, 21-, 24-, 27- or 30-membered macrocyclic silahydrocarbons of general formula (MeRSiC≡C)n, n=4-10 and R = H, Me, CH2=CH were synthesized by reaction of Me2Si(C≡CMgBr)2, Me(CH2=CH)Si(C≡CMgBr)2, BrMgC≡CMe2SiC≡CSiMe2C≡CMgBr or BrMgC≡CMe,SiC≡CSiMe,C≡CSiMe2C≡CSiMe2C≡CMgBr with MeHSiCl2, Me2SiCl2, Me(CH2=CH)SiCl2 or (ClMe2SiC≡C)2SiMe2. 23-Membered spiromacrocyclic polyacetylenic silahydrocarbons containing 6 silicon atoms, 8 triple bonds and central Si or Ge atoms were prepared by reaction of Me2Si(C≡CSiMe2C≡CMgBr)2 with MC4, (M = Si, Ge).