A potentially tridentate ligand with an S,N,O donor set, H2L, is formed by the reaction of N-
[(diethylaminothiocarbonyl)benzimidoyl chloride with benzoylhydrazine. Reactions of H2L with (NBu4
)[MOCl4] complexes (M = Re, Tc) give five-coordinate, neutral oxo complexes of the composition
[MOCl(L)]. Mixed-ligand complexes of rhenium(V) containing the tridentate L2- ligand and bidentate N,Ndialkyl-
N?-benzoylthioureato ligands (R2btu-) are formed in high yields when (NBu4)[ReOCl4] is treated
with mixtures of H2L and HR2btu. Another approach to the mixed-ligand products is the reaction of
[ReOCl(L)] with an equivalent amount of HR2btu. ?? 2009 Elsevier Ltd. All rights reserved.
