Abstract
The ‘4 + 1’ concept was used to prepare the complex salt [ReO(iao)Br]Br (1) from the reaction of (n-Bu4N)[ReOBr4(OPPh3)] with the ligand bis{2′-methyl(1′-methylimidazole)}-2-aminoethanol (Hiao) in methanol. The single-crystal X-ray crystal structure of 1 shows that iao acts as a monoanionic, tetradentate, N3O-donor chelate. When the reaction was carried out in acetonitrile, the neutral complex [ReO(iao)Br2] (2) was isolated. Elemental analyses and IR data suggest that iao acts as a tridentate, N2O-donor ligand in 2.
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