摘要:
N-(diethylthiocarbamoyl)benzimidoyl chloride reacts with o-aminoacetophenone 4-methylthiosemicarbazone under formation of a novel N2S2 benzamidine/thiosemicarbazone ligand (H2L). The reaction of H2L with [ReNCl2(PPh3)(2)] yields a red complex of the composition [ReN(L)]. The molecular structure of [ReN(L)] reveals a square-pyramidal environment around the Re atom, in which the organic ligand occupies all four positions of the equatorial plane. The reaction of H2L with [TcNCl2(PPh3)(2)] results in a mixture of [TcN(L)] and a side-product of the composition [TcN(PPh3)(Et2NC(S)NH)(L')] (L' = 1,10b-dimethyl-5-phenyl-1,10b-dihydro-[1,2,4]triazolo[1,5-c]quinazoline-2-thiolate). The formation of diethylthiourea and HL' is the result of a metal-driven decomposition of H2L followed by cyclization. (C) 2012 Elsevier B.V. All rights reserved.