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- W2088091918 abstract "Abstract Reaction of ctc -OsBr 2 (RaaiR ′ ) 2 [RaaiR ′ =1-alkyl-2-(arylazo)imidazole, p -R-C 6 H 4 -NN-C 3 H 2 -NN-1-R ′ , where R=H ( a ), Me ( b ), Cl ( c ) and R ′ =Me ( 2 ), Et ( 3 ) and CH 2 Ph ( 4 )] with 2,2 ′ -bipyridine (bpy) in presence of AgNO 3 in EtOH followed by the addition of NH 4 PF 6 afforded a mixed ligand complex [Os(bpy)(RaaiR ′ ) 2 ](PF 6 ) 2 . The structure of the complex, in one case [Os(bpy)(MeaaiMe) 2 ](PF 6 ) 2 · 4H 2 O, has been confirmed by X-ray crystallography. The complexes are diamagnetic (low spin d 6 , s =0) and they show intense MLCT transition in the visible region (480–525 nm) and a weak transition at longer wavelength (>850 nm) in CH 3 CN solution. Cyclic voltammetry of the complexes show two metal oxidation, Os(II)/Os(III) at 0.72–0.76 V and Os(III)/Os(IV) at 1.34–1.42 V and three successive ligand reductions." @default.
- W2088091918 created "2016-06-24" @default.
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- W2088091918 date "2004-05-01" @default.
- W2088091918 modified "2023-09-26" @default.
- W2088091918 title "Mixed ligand complexes of osmium(II)-2,2′-bipyridine: synthesis, spectral characterization and electrochemical properties of bis-chelated-arylazoimidazole-bipyridine-osmium(II) and X-ray crystal structure of [(2,2′-bipyridine)-bis-{1-methyl-2-(p-tolylazo)imidazole}osmium(II) hexafluorophosphate" @default.
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- W2088091918 doi "https://doi.org/10.1016/j.ica.2003.11.047" @default.
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