Spectro- and electrochemical studies of some ruthenium and osmium complexes of 2-(2'-pyridyl)benzimidazole; complexes with intra-molecular charge transfer |
| |
Authors: | Khalil M M Ali S A Ramadan R M |
| |
Institution: | Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt. |
| |
Abstract: | Reaction of Ru3(CO)12, with 2-(2'-pyridyl)benzimidazole (HPBI) resulted in the formation of Ru(CO)3(HPBI) (I) complex. In presence of pyridine or dipyridine, the two derivatives Ru(CO)3(HPBI)].Py (II) and Ru(CO)3(HPBI)].dpy (III) were isolated. The corresponding reactions of Os3(CO)12 yielded only one single product; Os(CO)2(HPBI)2 (IV). Spectroscopic studies of these complexes revealed intramolecular metal to ligand CT interactions. Reactions of RuCl3 with HPBI gave three distinct products; Ru(HPBI)2Cl2]Cl (V), Ru(HPBI)(dipy)Cl2]C1 (VI) and Ru(PBI)2(py)2]Cl (VII). The UV-vis studies indicated the presence of intramolecular ligand to metal CT interactions. Electrochemical investigation of the complexes showed some irreversible, reversible and quasi-reversible redox reactions due to tautomeric interconversions through electron transfer. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|