Kinetics and mechanism of nickel(II) ion retarded Schiff-base hydrolysis of 2,2'-dipyridylmethylideneaniline

1991 ◽  
Vol 56 (19) ◽  
pp. 5710-5712 ◽  
Author(s):  
Junghun Suh ◽  
Dong Won Min
Keyword(s):  
Schiff Base ◽  
Kinetics And Mechanism ◽  
Base Hydrolysis ◽  
Hydrolysis Of

Kinetics and mechanism of the aquation and base hydrolysis of the nitratopentaamminecobalt(III) ion and related complexes

1969 ◽  
Vol 8 (11) ◽  
pp. 2504-2508 ◽  
Author(s):  
William Edward Jones ◽  
Robert B. Jordan ◽  
T. W. Swaddle
Keyword(s):  
Kinetics And Mechanism ◽  
Base Hydrolysis ◽  
Hydrolysis Of

Reactivity of base catalysed hydrolysis of 2-pyridinylmethylene-8-quinolinyl-Schiff base iron(II) iodide complexes: solvent effects

2013 ◽  
Vol 67 (4) ◽  
Author(s):  
Ahmad Mohamad ◽  
Mohamed Adam
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Solvent Effects ◽  
Base Hydrolysis ◽  
Iodide Ions ◽  
Ligand Structure ◽  
Solvation Parameters ◽  
Kinetics Of ◽  
Hydrolysis Of ◽  
Direct Condensation

AbstractThree ligands of 2-pyridinylmethylene-8-quinolinyl (L1), methyl-2-pyridinylmethylene-8-quinolinyl (L2), and phenyl-2-pyridinylmethylene-8-quinolinyl (L3), Schiff bases were synthesised by direct condensation of 8-aminoquinoline with 2-pyridinecarboxaldehyde, 2-acetylpyridine, or 2-benzoylpyridine. They coordinated to Fe(II) ion in a 1: 2 mole ratio followed by treatment with iodide ions affording complexes with a general formula [Fe(L)2]I2·2H2O, (L = L1, L2, or L3). Spectrophotometric evaluation of the kinetics of base catalysed hydrolysis of these complex cations was carried out with an aqueous solution of NaOH in different ratios of water/methanol binary mixtures. Kinetics of the hydrolysis followed the rate law (k 2[OH−] + k 3[OH−]2)[complex]. Reactivity trends and their rate constants were compared and discussed in terms of ligand structure and solvation parameters. The methanol ratio affects the hydrolysis as a co-solvent which was analysed into initial and transition state components. The increase in the rate constant of the base hydrolysis of Fe(II) complexes, as the ratio of methanol increases, is predominantly caused by the strong effect of the organic co-solvent on the transition states.

Sign in / Sign up

Export Citation Format

Share Document