Abstract
Activation volumes for the complexation of nickel(II) ion with isoquinoline in various solvents were determined by a high-pressure stopped-flow technique. Values of activation volume for formation and dissociation of the (isoquinoline)nickel(II) complex are respectively 7.4 ± 1.3 and 8.9 ± 0.8 cm3 mol-1 in water, 9.3 ± 0.3 and 12.2 ± 0.3 cm3 mol-1 in N,N-di-methylformamide, 12.8 ± 0.6 and 9.9 ± 0.5 cm3 mol-1 in methanol, and 12.6 ± 0.5 and 15.7 ± 1.1 cm3 mol-1 in ethanol. The activation volume of the complex formation in acetonitrile is 9.4 ± 0.1 cm3 mol-1. All the positive values of the activation volume strongly indicate that the ligand substitution reactions on nickel(II) ion proceed via a dissociative-interchange mechanism in these solvents.
Original language | English |
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Pages (from-to) | 2564-2567 |
Number of pages | 4 |
Journal | Inorganic Chemistry |
Volume | 22 |
Issue number | 18 |
DOIs | |
Publication status | Published - 1983 Aug |
Externally published | Yes |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry