Indium complexes with aminothiolate ligands as single precursors for indium chalcogenides

Abstract

Indium complexes with aminothiolate ligands, In(dmampS)2Cl (1) and In(dmampS)3 (2), were synthesized by the metathesis reaction of InCl3 with 2 equiv. and 3 equiv. of Li(dmampS), respectively. The reaction of 1 with 1 equiv. of KSeCN resulted in the formation of In(dmampS)2(NCSe) (3). The three complexes have been characterized by IR, NMR, Mass spectroscopy, and microanalysis. Single-crystal X-ray diffraction studies revealed that complexes 1 and 3 have distorted trigonal bipyramidal geometry at the indium center. Thermogravimetric analyses indicated that the residual materials of the complexes 1, 2, and 3 could be presumably In2S3, In2S3, and In2Se2S, respectively. Thermal decomposition of 1–3 formed In2S3 (for 1 and 2) and In2Se2S (for 3). This was confirmed using EDS and ICP-AES.