scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Synthesis of some imidazole- and pyrazole- derived chelating agents

01 Jun 1981-Journal of Heterocyclic Chemistry (John Wiley & Sons, Ltd)-Vol. 18, Iss: 4, pp 803-805
TL;DR: In this article, condensation of o-phenylenediamines with carboxylic acids and reaction of bifunctional alkyl halides with bifunctionsal nucleophiles are described.
About: This article is published in Journal of Heterocyclic Chemistry.The article was published on 1981-06-01. It has received 303 citations till now. The article focuses on the topics: Benzimidazole & Isoindoline.
Citations
More filters
Journal ArticleDOI
TL;DR: A series of 2-methylaminobenzimidazole derivatives (1-11) synthesized by the reaction of 2-(chloromethyl)-1H-benzimidzole derivatives with primary aromatic amines showed good analgesic and anti-inflammatory activities.

285 citations

Journal ArticleDOI
TL;DR: Etude de coordinats organiques heterocycliques azotes ou possedant des atomes de soufre (ou oxygene) and d'azote as mentioned in this paper.

255 citations

Journal ArticleDOI
TL;DR: A new class of amphiphilic anionic platinum(II) bzimpy complexes has been demonstrated to show aggregation in water through Pt···Pt and π-π stacking interactions and a morphological transformation from vesicles to nanofibers have been demonstrated.
Abstract: A new class of amphiphilic anionic platinum(II) bzimpy complexes has been demonstrated to show aggregation in water through Pt···Pt and π–π stacking interactions. An interesting aggregation–partial deaggregation–aggregation process and a morphological transformation from vesicles to nanofibers have been demonstrated. These changes can be systematically controlled by the variation of solvent composition and could readily be probed by UV–vis absorption, emission, NMR, transmission electron microscopy, and even with our naked eyes.

216 citations

Journal ArticleDOI
TL;DR: The density functional theory calculation suggests that these Ir complexes possess dominantly metal-to-ligand charge-transfer and halide- to-ligands charge- transfer excited states.
Abstract: Novel mixed-ligand Ir(III) complexes, [Ir(L)(N∧C)X]n+ (L = N∧C∧N or N∧N∧N; X = Cl, Br, I, CN, CH3CN, or −CCPh; n = 0 or 1), were synthesized, where N∧C∧N = bis(N-methylbenzimidazolyl)benzene (Mebib) and bis(N-phenylbenzimidazolyl)benzene (Phbib), N∧N∧N = bis(N-methylbenzimidazolyl)pyridine (Mebip), and N∧C = phenylpyridine (ppy) derivatives. The X-ray crystal structures of [Ir(Phbib)(ppy)Cl] and [Ir(Mebib)(mppy)Cl] [mppy = 5-methyl-2-(2‘-pyridyl)phenyl] indicate that the nitrogen atom of the ppy ligand is located trans to the coordinating carbon atom in Me- or Phbib, while the coordinating carbon atom in ppy occupies the trans position of Cl. [Ir(Mebip)(ppy)Cl]+ showed a quasireversible Ir(III/IV) oxidation wave at +1.05 V, while the Ir complexes, [Ir(Mebib)(ppy)Cl], were oxidized at +0.42 V versus Fc/Fc+. The introduction of an Ir−C bond in [Ir(Mebib)(ppy)Cl] induces a large potential shift of 0.63 V in a negative direction. Further, the oxidation potential of [Ir(Mebib)(Rppy)X] was altered by the substi...

196 citations

Journal ArticleDOI
TL;DR: Absorption titration and thermal denaturation experiments indicate that the Co(bzimpy)(2) complex binds to DNA with moderate strength, and viscosity measurement shows that the mode of binding could be surface binding.

177 citations

References
More filters
Journal ArticleDOI
TL;DR: A series of cobalt-II and zinc-II complexes of the title ligand were reported in this paper, which contain mixed stereochemistries, e.g., five-coordinate trigonal bipyramidal cations [M(ligand)X]+, and four-coor...
Abstract: A series of cobalt(II) and zinc(II) complexes of the title ligand are reported which contain mixed stereochemistries, e.g., five-coordinate trigonal bipyramidal cations [M(ligand)X]+, and four-coor...

178 citations