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Reactions of Tetrakis[bis(trimethylsilyl)methyl]digallane(4) with Carboxylic Acids — Substituent Exchange and Bridging of the GaGa bond by two Carboxylato Groups
Author(s) -
Uhl Werner,
Hahn Ingo,
Reuter Hans
Publication year - 1996
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.19961291204
Subject(s) - chemistry , trimethylsilyl , substituent , medicinal chemistry , crystal structure , carboxylic acid , yield (engineering) , derivative (finance) , stereochemistry , chelation , polymer chemistry , organic chemistry , materials science , economics , financial economics , metallurgy
Yellow tetrakis[bis(trimethylsilyl)methyl]digallane(4) 1 reacts with two equivalents of the carboxylic acids RCOOH (R = −C 6 H 5 , − p −BrC 6 H 4 , −3,5‐Me 2 C 6 H 3 , −CMe 3 ) to yield almost quantitatively colorless products in which two bis(trimethylsilyl)methyl groups are replaced by two carboxylato ligands. As shown by a crystal structure determination with the 4‐bromo‐phenyl derivative ( 3 ), the GaGa bond is bridged by both carboxylato groups in a chelating manner. The GaGa distance is shortened to 238.5(2) pm ( 1 : 254.1(1) pm) and the coordination number of the Ga atoms increased to four.