Insertion of rhodizonic acid into the gallium-gallium and indium-indium bonds of digallane(4) and diindane(4) compounds [German]

摘要

Rhodizonic acid (C6O6H2, 5,6-dihydroxy-5-cyclohexene-1,2,3,4-tetraone) did not react with tetrakis[bis(trimethylsilyl)methyl]digallane(4) (1) and the corresponding diindium compound (2) by the transfer of protons. Instead the acid was completely inserted into the element-element bonds of the starting compounds and the gallium or indium atoms were oxidized from the oxidation state of +II to +III. In contrast to the free acid, the OH groups of the products are not attached to neighbouring carbon atoms, but occupy the 1,4-positions of the central six-membered rings. Both dialkyl-gallium and dialkylindium, groups of the products (3 (Ga) and 4 (In)) are coordinated by two oxygen atoms. They adopt opposite positions at the C6O6 molecular core. [References: 36]