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Gallium–Gallium Bonds Bridged by Functionalized Carboxylato Ligands
Author(s) -
Uhl Werner,
Bock Henrik R.,
Kösters Jutta,
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.200900579
Subject(s) - gallium , chemistry , isonicotinic acid , crystal structure , chelation , yield (engineering) , supramolecular chemistry , lewis acids and bases , stereochemistry , polymer chemistry , crystallography , medicinal chemistry , inorganic chemistry , organic chemistry , materials science , catalysis , hydrazide , metallurgy
Treatment of the tetraalkyldigallium compound R 2 Ga–Ga R 2 [ R = CH(SiMe 3 ) 2 ] ( 1 ) with a large number of different functionalized carboxylic acids afforded dicarboxylatodigallium compounds R 2 Ga 2 (μ‐O 2 C– R ) 2 , in which two carboxylato ligands bridge the Ga–Ga bonds. The chelating ligands have additional nitrogen, oxygen or phosphorus donor atoms and may be suitable to act as Lewis‐bases to yield supramolecular aggregates in future investigations. Four compounds have been characterized by crystal structure determinations. One gave unprecedented dimeric formula units in the solid state by Ga–N interactions. The similar reaction with isonicotinic acid resulted in the cleavage of the Ga–Ga bond. A tetragallium compound was formed in which four isolated metal atoms were bridged by four organic ligands to give a square molecular core.