Abstract
A novel mixed ligand hexacoordinated rhenium(III) complex of the general formula Re III[P][NN][S][SO] has been synthesized by reacting Re VOCl 3(PPh 3) 2 with 2,2′-bipyridine (NN), p-thiocresol (S) and N-acetyl- l-cysteine (SO) in a 1:1:1:1 ratio in methanol. During the reaction, the central rhenium atom undergoes reduction from Re(V) to Re(III). The complex was isolated as red crystals and characterized by elemental analysis, IR and NMR spectroscopies. X-ray crystallographic studies showed that the coordination geometry around rhenium is distorted octahedral. The equatorial plane is defined by the two nitrogen atoms of 2,2′-bipyridine, the sulfur of N-acetyl- l-cysteine and the sulfur of the aromatic thiol, while the phosphorous and the carboxylate oxygen of N-acetyl- l-cysteine occupy the apical positions.
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