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Umsetzungen von Ga 2 Br 4 · 2 Dioxan mit (Trimethylsilyl)methyllithium und Neopentyllithium – Synthese und Kristallstruktur von Lithiumtetraalkylgallanaten(III) mit Li–C–Ga‐Brücke
Author(s) -
Uhl Werner,
Klinkhammer KarlWilhelm,
Layh Marcus,
Massa Werner
Publication year - 1991
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19911240207
Subject(s) - methyllithium , chemistry , trimethylsilyl , diethyl ether , adduct , medicinal chemistry , disproportionation , dimer , crystal structure , pentane , lithium (medication) , tetrahydrofuran , ether , diglyme , stereochemistry , crystallography , organic chemistry , solvent , catalysis , medicine , endocrinology
Reactions of Ga 2 Br 4 · 2 Dioxane with (Trimethylsilyl)methyllithium and Neopentyllithium — Synthesis and Molecular Structure of Lithium Tetraalkylgallanates(III) with Li–C–Ga Bridges Ga 2 Br 4 · 2 dioxane reacts with (trimethylsilyl)methyllithium or neopentyllithium to yield in n ‐pentane/diethyl ether solution besides elemental gallium exclusively the disproportionation product trialkylgallane. In pure n ‐pentane the dioxane adducts of the corresponding lithium tetraalkylgallantes (R = CH 2 SiMe 3 2 ; R = CH 2 CMe 3 4 ) are formed. 2 and 4 are also synthesized by the reaction of GaBr 3 with alkyl lithium in the molar ratio 1:4. The crystal structure of 2 shows a dioxane‐bridged dimer and Li–C–Ga bridges with lithium probably bound by the C–H s̀‐bonds of the central carbon atoms.