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Reactions of the Digallium Compound R 2 Ga–Ga R 2 [ R = CH(SiMe 3 ) 2 ] with Water and Carboxylic Acids – Synthesis of μ‐Hydroxo‐μ‐carboxylatodigallium Compounds with Retention of the Ga–Ga Bonds
Author(s) -
Uhl Werner,
Bock Henrik R.,
Hepp Alexander,
Rogel Friedhelm,
Voß Matthias
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200900561
Subject(s) - chemistry , denticity , alkyl , gallium , medicinal chemistry , ligand (biochemistry) , stereochemistry , nuclear magnetic resonance spectroscopy , crystal structure , crystallography , organic chemistry , receptor , biochemistry
Treatment of the digallium compound R 2 Ga–Ga R 2 [ 1 , R = CH(SiMe 3 ) 2 ] with a broad variety of functionalized carboxylic acids in the presence of water yielded μ‐hydroxo‐μ‐carboxylatodigallium compounds ( 2 – 10 ) containing intact Ga–Ga bonds in high to moderate yields. The compounds form dimeric formula units in which the unsupported Ga–Ga bonds are bridged by two hydroxo and two carboxylato ligands. Each gallium atom is terminally coordinated by a bulky alkyl group. NMR spectroscopy revealed mixtures of two isomeric compounds in solution in all cases. The second component may show a different bridging mode with each Ga–Ga bond bridged by a bidentate carboxylato ligand to form Ga 2 O 2 C five‐membered heterocycles.