Organometallic 5d6 transition metal complexes of 1-methyl-(2-alkylthiomethyl)-1H-benzimidazole ligands: Structures and electrochemical oxidation

, , , und . Zeitschrift fuer Anorganische und Allgemeine Chemie 628 (5): 1132--1139 (2002)


Title compds. (mmb)Re(CO)3Cl, (mtb)Re(CO)3Cl, (mmb)OsCl(Cym)(PF6) and (Cym)OsCl(mtb)(PF6) Cym = p-cymene, mmb = 1-methyl-(2-methylthiomethyl)-1H-benzimidazole, mtb = 1-methyl-(2-tert-butylthiomethyl)-1H-benzimidazole were synthesized and, except for the latter, structurally characterized. In comparison with other late transition metal compds. of these N-S chelate ligands the Re(I) systems exhibit a balanced coordination to both N and S donor atoms. Anodic 1-electron oxidn. produces EPR-silent Re(II) states whereas the Os(III) species (mmb)OsCl(Cym)2+ could be identified via EPR and UV/visible spectroelectrochem. on SciFinder(R)

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