Michael Denker

Strukturen und Reaktionen von Methylantimondihalogeniden und Versuche zur Darstellung von Methylantimon

Abstract MeSbCl 2 ( 1 ) and SbCl 3 give the adduct MeSbCl 2 ·0.6SbCl 3 ( 1a ). MeSbBr 2 ( 2 ) reacts with NaI to form MeSbI 2 ( 3 ) and with Cr(CO) 5 THF to give Me(Br) 2 SbCr(CO) 5 ( 4 ). The crystal structures of 1a , 2 and 4 are reported. Derivatives of methyl antimony are obtained by reaction of 2 or 4 with Mg in tetrahydrofuran.

1H NMR spectra of Ph2SbX, PhSbX2, and Ph3SbX2 (XCl, Br, I); 121Sb Mössbauer spectra of PhSbX2 and crystal structure of Ph2SbI1☆

1H NMR spectroscopic data of Ph2SbX, PhSbX2, and Ph3SbX2 (XCl, Br, I) have been determined by iterative simulation. 121Sb Mossbauer spectra of PhSbX2 (XCl, Br, I) have been measured. The synthesis of Ph2SbI is achieved by reaction of Ph2SbCl with NaI in ethanol. The crystal structure of Ph2SbI consists of molecules with pyramidal C2SbI units.

New Aspects of the Syntheses and Molecular Structures of Me2SbSeSbMe2 and Related Compounds

The structures of bis(dimethylstibyl)chalcogenides have been studied by density functional theory calculations and gas electron diffraction.

The Molecular Structures and Conformational Preferences of Bis(dimethylstibyl)-Sulfane and -Tellurane, E(SbMe2)2, E = S or Te, Me = CH3, by Density Functional Theory Calculations and Gas Electron Diffraction

Density functional theory calculations on E(SbMe2)2, E = S or Te, Me = CH3, indicate that the equilibrium structures are syn-syn or near syn-syn conformers with overall C2v or C2 symmetry. The calculations further indicate the existence of syn-anti conformers about 4 kJ mol-1 (E = S) or 1 kJ m ol-1 (E = Te) above the equilibrium structure. G as electron diffraction data show that both conform ers are present in gaseous S(SbMe2)2, while the presence of the syn-anti conformer in gaseous Te(SbMe2)2 is uncertain. The Sb - S and Sb - Te bond distances are 241.4(4) and 278.1(3) pm, respectively, the valence angles of the synsyn conformers are