Die Insertion von Chalkogenatomen in die Gallium-Gallium-Bindung von Acetat-verbrückten Digallanen

Titelangaben

Uhl, Werner ; Cuypers, Lars ; Spies, Thomas ; Weller, Frank ; Harbrecht, Bernd ; Conrad, Matthias ; Greiner, Andreas ; Puchner, Mario ; Wendorff, Joachim H.:
Die Insertion von Chalkogenatomen in die Gallium-Gallium-Bindung von Acetat-verbrückten Digallanen.
In: Zeitschrift für anorganische und allgemeine Chemie. Bd. 629 (2003) Heft 7-8 . - S. 1124-1130.
ISSN 1521-3749
DOI: https://doi.org/10.1002/zaac.200300443

Volltext

Link zum Volltext (externe URL):

Abstract

The digallium(II) compound R2Ga2(mu-OOCCH3)(2) 2 R = CH(SiMe3)(2)] has a short Ga-Ga single bond, which is bridged by two acetato ligands. Owing to the chelating coordination by both carboxylato groups the gallium atoms are coordinatively saturated and have coordination numbers of four. Treatment of 2 with chalcogen atom donors such as propylene sulfide, triethylphosphonium selenide and telluride gave the insertion of sulfur, selenium and tellurium atoms into the Ga-Ga bond. By the oxidation of the gallium atoms products resulted which have angled Ga-S-Ga-(3), Ga-Se-Ga- (4) and Ga-Te-Ga units (5) in their molecular cores. In all cases, the carboxylato ligands remain in their bridging positions between two gallium atoms. The tellurium compound 5 shows a phase transition in the solid state, which was investigated by X-ray powder diffraction and DSC methods.