124643-10-3

Basic information

• Product Name: [4'-(p-tolyl)-2, 2':6',2''-terpyridine]osmium trichloride
• Synonyms: [4'-(p-tolyl)-2, 2':6',2''-terpyridine]osmium trichloride
• CAS NO: 124643-10-3
• Molecular Weight: 619.956
• Mol File: 124643-10-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: [4'-(p-tolyl)-2, 2':6',2''-terpyridine]osmium trichloride(CAS DataBase Reference)
• NIST Chemistry Reference: [4'-(p-tolyl)-2, 2':6',2''-terpyridine]osmium trichloride(124643-10-3)
• EPA Substance Registry System: [4'-(p-tolyl)-2, 2':6',2''-terpyridine]osmium trichloride(124643-10-3)

Safety Data

• Hazardous Substances Data: 124643-10-3(Hazardous Substances Data)

Upstream product

• 89972-77-0 4'-(4-methylphenyl)-2,2':6',2-terpyridine 

Relevant articles and documents

Monometallic osmium(II) complexes with bis(N -methylbenzimidazolyl)benzene or -pyridine: A comparison study with ruthenium(II) analogues

Seven bis-tridentate osmium complexes with Mebib or Mebip (Mebib is the 2-deprotonated form of 1,3-bis(N-methylbenzimidazolyl)benzene and Mebip is bis(N-methylbenzimidazolyl)pyridine) have been prepared, and their electrochemical and spectroscopic properties are compared with ruthenium structural analogues. Among them, four complexes have the [Os(NCN)(NNN)]-type coordination, including [Os(Mebib)(Mebip)](PF6)2 (1(PF6)2), [Os(dpb)(Mebip)](PF6) (2(PF 6), dpb is the 2-deprotonated form of 1,3-di(pyrid-2-yl)benzene), [Os(Mebib)(ttpy)](PF6) (3(PF6), ttpy = 4′-tolyl-2,2′:6′,2″-terpyridine), and [Os(dpb)(ttpy)](PF6) (4(PF6)). The other three complexes are [Os(Mebip)2](PF6)2 (5(PF6) 2), [Os(Mebip)(tpy)](PF6)2 (6(PF 6)2, tpy = 2,2′:6′,2″-terpyridine), and [Os(ttpy)2](PF6)2 (7(PF6) 2) with the [Os(NNN)(NNN)]-type coordination. Single crystals of 2(PF6) and 6(PF6)2 have been obtained, and their structures are studied by X-ray crystallographic analysis. The Os(II/III) redox potentials of 1(PF6)2 to 7(PF6) 2 progressively increase from +0.04, +0.23, +0.24, +0.36, +0.56, +0.79 to +0.94 V vs Ag/AgCl, which are 200-300 mV less positive relative to the Ru(II/III) potentials of their ruthenium counterparts. The highest occupied molecular orbital energy levels of 1+-72+ are calculated to vary in a descending order. The ruthenium and osmium complexes have singlet metal-to-ligand charge-transfer (MLCT) transitions of similar energies and band shapes, while the osmium complexes display additional 3MLCT transitions in the lower-energy region. Complexes 6(PF6)2 and 7(PF6)2 emit weakly at 780 and 740 nm, respectively. Complex 1(PF6)2 was synthesized as the oxidized Os(III) salt because of the low Os(II/III) potential. The transformation of 1 2+ to 1+ by chemical reduction or electrolysis led to the emergence of the 1MLCT transitions in the visible region.