Lutz Rösch

Die kristallstruktur von tetracarbonyl(tri-t-butylphosphin)eisen

The crystal structure of tetracarbonyl(tri-t-butylphosphine)iron has been determined from a single crystal X-ray study. The compound crystallizes with four molecules in an unit cell of symmetry P 212121-D42, with the following parameters: orthorhombic system, a = 18.842(7), b = 10.062(4), c = 9.790(2) A. The structure shows a trigonal bipyramide with the phosphine ligand in an axial position and a FeP bond length of 2.364(1) A.

Synthese und eigenschaften von koordiniertem und solvatfreiem tris(trimethylsilyl)aluminium

Abstract With tetrahydrofuran or diethyl ether coordinated tris(trimethylsily)aluminium is synthesized by treatment of chlorotrimethylsilane with aluminium and lithium in tetrahydrofuran/benzene or diethyl ether in the presence of mercury. Unsolvated tris(trimethylsilyl)aluminium is available by reaction of sodium tetrakis(trimethylsilyl)aluminate with aluminium chloride in pentane. The IR, Raman, 1 H, 13 C and 27 Al NMR spectra are discussed.

Eine einfache methode zur synthese von organosilylphosphinen

Abstract Trimethylchlorosilane reacts with di-(t-butyl)chlorophosphine, t-butyldichlorophosphine or PCl 3 and magnesium in hexametylphosphoric triamide under formation of trimethylsilyl-di-(t-butyl)phosphine, bis(trimethylsilyl)-t-butylphosphine or tris(trimethylsilyl)phosphine respectively in high yields. This method is also useful for the synthesis of organogermanium and organotin phosphines as well as of corresponding organometal arsines.

Synthese und struktur von dicyclopentadienyl(trimethylsilyl)titanchlorid

Abstract Dicyclopentadienyl(trimethylsilyl)titanium chloride, a stable trimethylsilyltitanium compound, is synthesized by reaction of dicyclopentadienyltitanium dichloride and tris(trimethylsilyl)aluminium, coordinated with diethyl ether, or lithium tetarakis(trimethylsilyl)aluminate. The IR and NMR spectra are reported. The crystal structure of the title compound has been determined. It shows a distorted tetrahedral surrounding of the titanium atom; the Ti–Si distance is 267 pm.

Organometallphosphin-substituierte übergangsmetallkomplexe V. Synthese, eigenschaften und komplechemisches verhalten von (trimethylstannyl)di-tert-butylphosphin☆

Abstract (Trimethylstannyl)dimethylamine reacts with di-tert-butylphosphine under formation of (trimethylstannyl)di-tert-butylphosphine, which forms with nickel tetracarbonyl, iron pentacarbonyl and molybdenum hexacarbonyl, under cleavage of one molecule of carbon monoxide, the complexes [(trimethylstannyl)di-tert-butylphosphine]tricarbonylnickel, -tetracarbonyliron and -pentacarbonylmolybdenum, respectively. the IR, 1 H and 31 P NMR spectra are reported and assigned.

Darstellung und spektroskopische untersuchung von bis(tri-t-butylsilyl)quecksilber

Tri-t-butylsilane reacts with di(t-butyl)mercury with loss of isobutane and formation of bis(tri-t-butylsilyl)mercury. Infrared, Raman, 1H NMR, and 13C NMR spectra are reported and compared with the spectra of bis(tri-t-butylsilyl)-cadmium.

A PHOSPHORANE WITH A (λ5)-PHOSPHORUS-SILICON BOND

Abstract Reaction of bis(trimethylsilyl)magnesium with bis(catechyl)chlorophosphorane has furnished the first phosphorane with a (λ5)-phosphorus-silicon bond, extending the range of atoms known to give rise to stable phosphoranes when bonded to five-co-ordinate phosphorus. The novel phosphorane has been characterized by analysis, n.m.r. spectra and from its mass spectrum.

Tetrakis(trimethylgermyl)diphosphin

Zusammenfassung The title compound, [(CH 3 ) 3 Ge] 2 PP[Ge(CH 3 ) 3 ] 2 is formed by the reaction of BrCH 2 CH 2 Br with [(CH 3 ) 3 Ge] 2 PLi, the latter compound can be prepared by metallation of [(CH 3 ) 3 Ge] 3 P with LiCH 3 in ether.

Kristallstruktur und spektroskopische Untersuchung von Mg(GeMe3)2 · 2 DME / Crystal Structure and Spectroscopic Study of Mg(GeMe3)2 · 2 DME

Mg(GeMe3)2 · 2 DME is synthesized by reaction of Hg(GeMe3)2 with magnesium in 1 ,2 -- dimethoxyethane. The X-ray structure, IR, Raman, 1H NMR , and 13C NMR spectra of this first organogermyl magnesium compound are reported.

13C-NMR-Spektroskopische untersuchungen an elementorganischen verbindungen

Zusammenfassung The carbon-13 chemical shifts of 23 organometallic compounds have been measured. It is shown that carbon-13 NMR might be a valuable tool for the investigation of mixures of alkylsilyl compounds.