Spectro- and electrochemical studies of some ruthenium and osmium complexes of 2-(2′-pyridyl)benzimidazole;: complexes with intra-molecular charge transfer

被引：34
作者：
Khalil, MMH
Ali, SA
Ramadan, RM [1 ]
机构：
[1] Ain Shams Univ, Fac Sci, Dept Chem, Cairo, Egypt
[2] Ain Shams Univ, Coll Girls, Dept Chem, Cairo, Egypt
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2001年 / 57卷 / 05期
关键词：
ruthenium; osmium; benzimidazole; spectra; charge transfer complexes; cyclic voltammetry;
D O I：
10.1016/S1386-1425(00)00411-X
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Reaction of Ru-3(CO)(12), with 2-(2 ' -pyridylbenzimidazole (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 Os-3(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 NPBI gave three distinct products; [Ru(HPBI)(2)Cl-2]Cl (V), [Ru(HPBI)(dipy)Cl-2]Cl (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. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1017 / 1024
页数：8
相关论文
共 22 条
[1]  
ABDELSHAFI AA, UNPUB
[2]   Chromium, molybdenum and ruthenium complexes of chloranilic acid [J].
Ali, SA ;
Khalil, MMH ;
Ramadan, RM .
TRANSITION METAL CHEMISTRY, 2000, 25 (02) :121-125
[3]   Luminescent and redox-active polynuclear transition metal complexes [J].
Balzani, V ;
Juris, A ;
Venturi, M ;
Campagna, S ;
Serroni, S .
CHEMICAL REVIEWS, 1996, 96 (02) :759-833
[4]   STRUCTURAL EFFECTS ON THE ANTITUMOR-ACTIVITY OF ORGANOTIN COMPOUNDS .2. FURTHER DIARYLTIN DICHLORIDE COMPLEXES WITH NITROGEN-DONOR LIGANDS [J].
BIDDLE, BN ;
GRAY, JS .
APPLIED ORGANOMETALLIC CHEMISTRY, 1991, 5 (05) :439-441
[5]   HYDROGEN-BONDING-INDUCED SOLVATOCHROMISM IN THE CHARGE-TRANSFER TRANSITIONS OF RUTHENIUM(II) AND RUTHENIUM(III) AMMINE COMPLEXES [J].
CURTIS, JC ;
SULLIVAN, BP ;
MEYER, TJ .
INORGANIC CHEMISTRY, 1983, 22 (02) :224-236
[6]   Thermal ring-closure reactions of pentacarbonylchromium complexes with bidentate N-N ligands revisited. Elimination of side reactions and elucidation of the intimate chelation mechanism [J].
Ducker-Benfer, C ;
Grevels, FW ;
van Eldik, R .
ORGANOMETALLICS, 1998, 17 (09) :1669-1676
[7]   SYNTHESIS AND PROTONATION-DEPROTONATION REACTIONS OF RUTHENIUM(II) COMPLEXES CONTAINING 2,2'-BIBENZIMIDAZOLE AND RELATED LIGANDS [J].
HAGA, M .
INORGANICA CHIMICA ACTA-ARTICLES, 1983, 75 (01) :29-35
[8]   THE OUTER-SPHERE INTERACTIONS IN RUTHENIUM AND OSMIUM COMPLEXES .1. SPECTROPHOTOMETRIC AND VOLTAMMETRIC STUDIES ON THE HYDROGEN-BONDING INTERACTIONS OF BIS(2,2'-BIPYRIDINE)(2-(2'-PYRIDYL)-BENZIMIDAZOLE)RUTHENIUM(II) CATION AND ITS DERIVATIVES WITH AROMATIC NITROGEN-HETEROCYCLES [J].
HAGA, MA ;
TSUNEMITSU, A .
INORGANICA CHIMICA ACTA, 1989, 164 (02) :137-142
[9]   SYNTHESIS, STRUCTURAL AND PHYSICAL STUDIES OF TIN(IV) COMPLEXES WITH 2-(2-PYRIDYL)BENZIMIDAZOLE [J].
KABANOS, TA ;
KERAMIDAS, AD ;
MENTZAFOS, D ;
RUSSO, U ;
TERZIS, A ;
TSANGARIS, JM .
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1992, (18) :2729-2733
[10]  
Kadish K. M., 1982, ELECTROCHEMICAL SPEC
123