Adducts of indium(III) bromide: synthesis and structural characterisation of [InBr3(THF)2], [InBr3(DMF)3], [InBr3(Me3[9]aneN3)] and [InBr3({–N(Me)–CH2–}3)]
2001; Elsevier BV; Volume: 20; Issue: 5 Linguagem: Inglês
10.1016/s0277-5387(00)00641-0
ISSN1873-3719
AutoresGerald R. Willey, D.R. Aris, John V. Haslop, W. Errington,
Tópico(s)Synthesis and Biological Evaluation
ResumoTreatment of InBr3 with THF gives InBr3(THF)2. A crystal structure determination (X-ray diffraction) reveals that the five co-ordinate metal centre adopts a trigonal bipyramidal geometry with the three halogen atoms in the equatorial plane and the two THF ligands in axial positions. Cremer–Pople ring puckering analysis reveals one THF ligand in a twist conformation and the other in an envelope arrangement in each molecule. The reaction of InBr3 with DMF in hexane gives InBr3(DMF)3 identified (spectroscopic and X-ray diffraction) as the six co-ordinate fac-octahedral isomer. Treatment (1:1 in acetonitrile) of InBr3 with 1,4,7-trimethyl-1,4,7-triazacyclononane gives InBr3(Me3[9]aneN3) in which the anticipated facial co-ordination of the terdentate ligand results in a distorted octahedral geometry at the metal centre as confirmed by X-ray diffraction. Similar treatment of InBr3 with 1,3,5-trimethyl-1,3,5-triazacyclohexane gives InBr3({–N(Me)–CH2–}3) as verified by spectroscopic analyses and an X-ray diffraction study.
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