Effect of solvent on the reactions of coordination complexes: Part 15 : Base hydrolysis of Cis ‐(Chloro)(benzimidazole)‐ Bis ‐(ethylenediamine)cobalt(III) ion in mixed solvent media | Zendy

Dash Anadi C. | Zendy; Dash Neelamadhab | Zendy

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Effect of solvent on the reactions of coordination complexes: Part 15 : Base hydrolysis of Cis ‐(Chloro)(benzimidazole)‐ Bis ‐(ethylenediamine)cobalt(III) ion in mixed solvent media

Author(s) -

Dash Anadi C.,

Dash Neelamadhab

Publication year - 1990

Publication title -

international journal of chemical kinetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 68

eISSN - 1097-4601

pISSN - 0538-8066

DOI - 10.1002/kin.550221203

Subject(s) - aquation , chemistry , ethylenediamine , benzimidazole , deprotonation , hydrolysis , cobalt , conjugate , medicinal chemistry , reaction rate constant , inorganic chemistry , solvent , base (topology) , kinetics , ion , organic chemistry , mathematical analysis , physics , mathematics , quantum mechanics

The kinetics of base hydrolysis ofthe cis ‐(chloro)‐(benzimidazole) bis (ethylenediamine) cobalt(III) ion was investigated in Methanol‐water and Ethyleneglycol‐water media of varying compositions and at isodielectric conditions( D s ≃ 61 at 25°C) in isopropanol‐ and Acetonitrile‐water media at 35°C in the pH range, 7.2–8.9. It is of interesttonote that the aquation rate constant of the conjugate base, cis ‐[Co(en) 2 (bzm)Cl] + (Bzm = N H deprotonated benzimidazole, en = ethylenediamine) is virtually insensitive to the compositions of the mixed solvents studied, unlike the aquation rate constant of the conjugate acid form of the title complex. This is indicative of a true dissociative mode of activation ( D cb ) of the conjugate base.

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