Benzimidazole, 2- metal complexes

Benzenemethanethiol,a-(selenylmethylene)-metal complexes, 809 Benzeneselenic acid metal complexes, 807 Benzenetetrathiols metal complexes, 606 Benzenethiol, 2-amino-metal complexes, 799 Benzenethiol, o-hydroseleno-metal complexes, 809 Benzimidazole, 2-guanidinium-metal complexes, 283 Benzimidazole, 2-mercapto metal complexes, 802 Benzimidazole, 2-(2-pyridyl)-metal complexes, 93 Benzimidazoles metal complexes, 78, 85 P a, 11... 

Barbituric acid, methyl-5-nitroso-zinc complexes, 958 Bayldonite, 960 Benzeneselenic acid metal complexes, 977 Benzimidazole metal complexes, 949 Benzoquinoline zinc complexes, 953 Benzothiazole zinc complexes, 981 Benzotriazole zinc complexes, 950 Benzoxazole metal complexes, 951 Berry twist... 

The metal complex of benzimidazole is much less stable than the corresponding complex of imidazole. Thus a comparison of experiment 1 in Table II and experiment 1 in Table III shows that starting with equal concentrations of the uncharged ligand, the ratios of the complexed ligand per mole of Ni (II) are equal... 

Acceptably stable metal complexes also may be prepared, such as the cobalt-cthy-Icnediamine product 156. The reaction on benzimidazole derivatives affording seven-membered rings (158) confirms the tendency to produce cycles larger than the pentaatomic ones, as a molecule containing two fused fivc-membered rings would in principle be expected from this type of substrate (see also the derivatives 130,131,140, 149 described above). 

Under reductive conditions an o-nitro-iV,iV-dimethylaniline (14 R = Me) is converted into a benzimidazolinone in a reaction which may involve transition metal complexes. When, however, the iV,N-diethylaniline (14 R = Et) is subjected to the same reaction conditions, the product is the benzimidazole (IS Scheme 7). 

Freiser and co-workers have investigated the acid-strengthening effect of chelation on a ligand at a position outside of the chelate ring. One of the earlier studies involved divalent metal complexes of 2-(2-pyridyl)-benzimidazole (55),... 

Metal complexes of lactams, imidazoles, and benzimidazoles, biological activity of 85UK1152. 

Metal complexes of benzimidazoles and their biological activity ... 

Examples of reactions of coordinated imidazoles are discussed later (see Section 3.02.5.3.5), but some conception of the effects of such coordination can be obtained by observation of the H NMR spectra where complex formation usually causes deshielding <89BSF472>. The biological activity of metal complexes of imidazoles and benzimidazoles has been reviewed <85RCR676>. 

When benzimidazole acts as a corrosion inhibitor for copper this involves formation of a coordination polymer which results from aerial oxidation of the initial benzimidazole-Cu" complex to give a film of bis-benzimidazolatocopper + (51) on the metal surface <89JCS(P2)33>. 

A photoactive metal center is introduced in these systems. The ruthenium bipyridyl complexes are coordinated to the emeraldine base to form the corresponding polymer complexes as described above." The incorporation of the ruthenium centers to the pyridyl backbone has been also reported to give the ruthenium complexes Conjugated ruthenium bipyridine complexes thus obtained are evaluated to be photorefractive materials. Other transition metal complexes can be employed to form the corresponding polymer complexes. The pyridine unit is replaced by bithienyl, 1,4-diazabutadiene, ethylene, benzimidazole or thiazole. ... 

XIU 11] Xiu Q., Huang H., Liu Y. et al., A novel main chain polymeric metal complex based on Zn(II) with thiophene and 2-(2 -pyridyl)benzimidazole ligand synthesis, characterization, photovoltaic properly and application in DSSCs , Synthetic Metals, vol. 161, nos. 5-6, pp. 455-459, 2011. 

Besides porphyrin derivatives, several other boronated DNA-binding molecules, such as alkylating agents, intercalators, minor-groove binders, polyamines, and metal complexes have been reported. Some examples of such molecules are shown in Figure 10.15, and include derivatives of aziridines (61), acridines (62), phenanthridines (63), Pt(ll) complexes (64, 65), trimethoxyindoles (66), carboranylpolyamines, di- and tri-benzimidazoles, and dequalinium derivatives (67). "... 

Several F NMR studies have been reported on ligand exchange reactions of metal complexes (i.e. the Al(Ttfac)3-Al(bzac)3 system) and also on relative polarity and reactivity of N-H, N-Hg and N-Au bonds in intermolecular exchange reactions of fluorine-containing ligands (for example, 2-(4-fluoro-phenyl) benzimidazole) and their PhHg and Ph3PAu derivatives. 

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