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DOI: 10.1039/A807041E (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1999, 141-146

Synthesis and structural characterization of indium compounds with bidentate amide ligands

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Jungsook Kim, Simon G. Bott and David M. Hoffman

Abstract

Indium trichloride reacts with 1 equivalent of MeN(SiMe2NMeLi)2 to give the dimer [ClIn(NMeSiMe2)2NMe]2 and with 4 equivalents of HNMeSiMe2NMeLi to give [Li{In(HNMeSiMe2NMe)2(MeNSiMe2NMe)}]2. In the structure of [ClIn(NMeSiMe2)2NMe]2 a chloride and one amide group of a [MeN(SiMe2NMe)2]2– ligand are bonded to each In atom in terminal positions and the other amide group of the chelating ligand is shared between two In atoms. The terminal chlorides have an anti-ClIn[hair space][hair space]· · ·[hair space][hair space]InCl arrangement. The amine group of the [MeN(SiMe2NMe)2]2– ligand does not interact with In. Variable temperature NMR spectra show [ClNn(NMeSiMe2)2NMe]2 undergoes a fluxional process, and a mechanism involving bridge–terminal amide exchange is proposed to account for the data. The molecule [Li{In(HNMeSiMe2NMe)2(MeNSiMe2NMe)}]2 has a Li2In2Si2N4 adamantane-like core and overall virtual D2 symmetry.

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