Kinetics and mechanism of formation and dissociation of copper(II) and nickel(II) complexes of the Schiff base bis(acetylacetone)ethylenediimine in aqueous-organic solvent media

Gangopadhyay, Somnath; Banerjee, R. N.; Banerjea, D.

doi:10.1007/bf00619017

Transition Met Chem

1985

DOI: 10.1007/bf00619017

|View full text |Cite

Kinetics and mechanism of formation and dissociation of copper(II) and nickel(II) complexes of the Schiff base bis(acetylacetone)ethylenediimine in aqueous-organic solvent media

Somnath Gangopadhyay

R. N. Banerjee

D. Banerjea

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1987

1994

Publication Types

Select...

Article5

Relationship

Self Cite0

Independent5

Authors

Journals

Cited by 10 publications

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Kinetics and mechanism of reactions of bis(biguanide)copper(II) ion with glycine and ?-alanine in aqueous media

Das

1994

Transition Met Chem

View full text Add to dashboard Cite

The kinetics of the reaction of [Cu(bigH)2] 2+ (bigH = biguanide) with an excess of amino acid (LH), namely glycine or e-alanine, in aqueous solution in the 7.6-9.0 pH range at different temperatures (30-40~ have been followed by stopped-flow spectrophotometry. The ligand replacement process has been found to pass through intermediate formation of a ternary complex, [Cu(bigH)L] + at the slower step, followed by rapid transformation into the binary complex, [CuL2]. The overall ligand replacement process has a ligand dependent (kl) path which is first order with respect to the incoming ligand (L-), and a ligand independent (k0) path. Under pseudo-first order conditions containing excess amino acid, the experimental observations conform to the rate law koh ~ = k o + k~K,[L]r/ ([H +] + K~), where [LIT stands for the total concentration of amino acid and Ka gives the deprotonation constant of LH. The solvent assisted dissociation (i.e. k 0 path) leads to a copper(II) mono-biguanide complex followed by rapid nucleophilic substitution; the k~ path is in agreement with an associative mechanism. The activation parameters (AH e , AS ~ ) for each step have been determined.

show abstract

Kinetics and mechanism of reactions of bis(biguanide)copper(II) ion with glycine and ?-alanine in aqueous media

Das

1994

Transition Met Chem

View full text Add to dashboard Cite

show abstract

Mechanisms of reactions of metal complexes: Some recent developments

Banerjea

1987

Transition Met Chem

View full text Add to dashboard Cite

Kinetics and mechanism of dissociation of some tri- and tetra-dentate complexes of copper(II) in acid media

Das

Gangopadhyay

Banerjea

1987

Transition Met Chem

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Kinetics and mechanism of formation and dissociation of copper(II) and nickel(II) complexes of the Schiff base bis(acetylacetone)ethylenediimine in aqueous-organic solvent media

Cited by 10 publications

References 34 publications

Kinetics and mechanism of reactions of bis(biguanide)copper(II) ion with glycine and ?-alanine in aqueous media

Kinetics and mechanism of reactions of bis(biguanide)copper(II) ion with glycine and ?-alanine in aqueous media

Mechanisms of reactions of metal complexes: Some recent developments

Kinetics and mechanism of dissociation of some tri- and tetra-dentate complexes of copper(II) in acid media

Contact Info

Product

Resources

About