A convenient synthesis of methylindium(III) dithiolate complexes—precursors for indium sulfides

✍ Scribed by Shamik Ghoshal; Nisha P. Kushwah; Dimple P. Dutta; Vimal K. Jain

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 141 KB
• Volume: 19
• Category: Article
• ISSN: 0268-2605
• DOI: 10.1002/aoc.981

✦ Synopsis

Abstract

Methylindium(III) dithiolate complexes of the general formulae [Me~2~In(S^∩^S)] (1) and [MeIn(S^∩^S)~2~] (2) [S^∩^S = (EtO)~2~PS~2~^−^, (Pr^i^O)~2~PS~2~^−^, Et~2~NCS~2~^−^, $\hbox{Pr}^{\rm i}_{2}\hbox{NCS}{_{2}}^{-}$, O(CH~2~CH~2~)~2~NCS~2~^−^, EtOCS~2~^−^ and Pr^i^OCS~2~^−^] have been isolated conveniently by the reaction of Me~3~In·OEt~2~ with In(S^∩^S)~3~ (3) in an appropriate stoichiometry. Both 1 and 2 have been characterized by indium analysis, IR, NMR (^1^H, ^13^C{^1^H} and ^31^P{H}) and mass spectral data. NMR data of 3 are also included for comparison. The Me–In and S^∩^S resonances are sensitive to the number of methyl groups attached to indium metal. The mass spectral data indicate that these complexes are monomeric in nature. The thermal behavior of a few complexes has been investigated. The xanthate and dithiocarbamate complexes on pyrolysis under dynamic vacuum or flowing nitrogen atmosphere gave either In~2~S~3~ or a mixture of InS, In~2~S~3~ and In~6~S~7~, which were characterized using EDAX and powder XRD. Copyright © 2005 John Wiley & Sons, Ltd.