Coordination compounds of heterocyclic hydrazinecarboxamides with trivalent indium

The reactions of In(O-i-Pr)(3) with bidentate ligands of the type R-C(CH3):NNHCONH2 [R = C4H3O, C4H3S, C5H4N and C10H7] leads to the isolation of products of the type In(O-i-Pr)(3-n)(L)(n) [n = 1, 2 or 3 and L = anion of the ligand], depending on the stoichiometry of the reaction. The alcoholysis of indium isopropoxy complexes with t-BuOH has also been investigated. All the complexes were fully characterized by elemental analyses, molar conductance, IR, H-1 and C-13 NMR spectroscopy. The molecular weight determinations confirm the dimeric nature of mono- and bis-alkoxy indium(III) complexes and monomeric nature of the tris(ligand)indium(III) derivatives.