New group 6 metal carbonyl derivatives of 2-(2′-pyridyl)benzimidazole: Synthesis and spectroscopic studies
Khalil, M.M.H.; Mohamed, Hassan A.; El-Medani, Samir M.; Ramadan, Ramadan M.;
Abstract
Reaction of Cr(CO)6 with 2-(2′-pyridyl)benzimidazole (pbiH) under reduced pressure resulted in the formation of the dinuclear complex [Cr2(CO)6(pbiH)2]. Infra-red (IR) spectroscopy revealed the presence of terminal and bridge Cr-CO bonds. Interaction of M(CO)6, M=Cr, Mo and W, with pbiH in the presence of 2,2′-bipyridine (bpy) gave the tetracarbonyl complexes [M(CO)4(pbiH)]·bpy. Spectroscopic studies of the complexes indicated the presence of hydrogen bonding between the bpy nitrogen and the NH group of pbiH. Reactions of M(CO)6 with pbiH in the presence of PPh3 gave the tricarbonyl monosubstituted derivatives [M(CO)3(PPh3)(pbiH)]. The spectroscopic studies of the complexes suggested the proposed structures. © 2002 Elsevier Science B.V. All rights reserved.
Other data
| Title | New group 6 metal carbonyl derivatives of 2-(2′-pyridyl)benzimidazole: Synthesis and spectroscopic studies | Authors | Khalil, M.M.H. ; Mohamed, Hassan A.; El-Medani, Samir M.; Ramadan, Ramadan M. | Keywords | Benzimidazole complexes | Charge transfer | Hydrogen bonding | Metal carbonyls | PPh complexes 3 | Proton transfer | Spectra | Issue Date | 1-Apr-2003 | Journal | Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Volume | 59 | Issue | 6 | Start page | 1341 | End page | 1347 | ISSN | 13861425 | DOI | 10.1016/S1386-1425(02)00330-X | PubMed ID | 12659903 | Scopus ID | 2-s2.0-0037384598 |
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