Abstract
A series of cationic, half-sandwich ruthenium complexes with the general formula [(η 6-arene)RuCl(R 1S-C 6H 4-2-CH NR 2)] + (arene = p-cymene or hexamethylbenzene; R 1 = CH 2Ph, i Pr, or Et; R 2 = aryl) have been prepared from the reaction of [(η 6-arene)RuCl 2] 2 with various N,S-donor Schiff base ligands derived from 2-(alkylthio)benzaldehyde and several primary amines. All of the ruthenium complexes were characterized by IR, 1H NMR, electrochemistry, and UV/Vis spectroscopies. The p-cymene complexes undergo irreversible oxidations while the hexamethylbenzene complexes undergo quasi-reversible oxidations. The molecular structures of ligand 1a and complexes 4a, 4l, and 5e were determined by X-ray crystallography.
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