Co-ordination compounds of indium. Part XXVIII. Preparation and oxidation of indium(I) derivatives of bidentate organic bases

Abstract

Simple compounds of indium(I), InX, with the anions of bidentate monoprotic organic ligands have been prepared for the first time by the reaction of the parent acid with cyclopentadienylindium(I) in organic solvents [X = 4,4,4-trifluoro-1-(thien-2′-yl)butane-1,3-dionate. 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyloctane-3,5-dionate, quinoline-8-olate, and the anions of 2-mercapto-pentan-3-one and -cyclohexanone]. Studies with one such compound, indium(I) quinoline-8-olate, show that reaction with mild oxidising agents or weak acids gives indium(III) species; this offers a useful synthetic route to unusual co-ordination compounds of In^III.