1H NMR Studies of Some Imidazole Ligands Coordinated to Co(III)

Authors : Kosrow ZAMANI, Akbar MOBINIKHALEDI

Pages : 71-76

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Chemical shifts for proton signals of an imidazole ring coordinated to Coinsert ignore into journalissuearticles values(III); move downfield as the total complex charge increases. However, the Cinsert ignore into journalissuearticles values(2); - H chemical shift of the imidazole ring in cis-[Coinsert ignore into journalissuearticles values(en);2insert ignore into journalissuearticles values(N-mIm); OPO3H]°, which has no charge compared to those of cis-[Coinsert ignore into journalissuearticles values(en);2insert ignore into journalissuearticles values(N-mIm); OPO3H]+ and cis}-[Coinsert ignore into journalissuearticles values(en);2insert ignore into journalissuearticles values(N-mIm); OPO3H2]2 + , moves downfield. These unexpected phenomena could be attributed to an intramolecular interaction between the phosphate anion group and Cinsert ignore into journalissuearticles values(2); - H of the imidazole ligand.
Keywords : Turk J Chem, 27, 2003, 71 76 Turk J Chem, vol 27, iss 1