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Oxygen-17 and proton nuclear magnetic resonance studies on acetic acid exchange processes of the chloride, nitrate, and acetate of nickel(II) in acetic acid

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100269a034· OSTI ID:6344362
The exchange rates of acetic acid coordinating to nickel(II) chloride, nickel(II) nitrate, and nickel(II) acetate in neat acetic acid and acetic acid/dichloromethane-d2 mixtures were measured by the oxygen-17 and proton NMR line-broadening methods. The activation parameters for the acetic acid exchange on these nickel(II) salts were independent of the concentration of acetic acid (HOAc) in the mixed solvents. The first-order rate constants at 25C and the activation parameters are k = (5.5 +/- 0.2) x 10V s , H = 41 +/- 2 kJ mol , and S = 3 +/- 7 J mol K for NiCl2, k = (3 +/- 1) x 10V s , H = 37 +/- 5 kJ mol , and element of = -18 +/- 20 J mol K for Ni(NO3)2, and k = (3 +/- 1) x 10V s , H = 50 +/- 5 kJ mol , and S = 28 +/- 20 J mol K for Ni(OAc)2. Solvent exchange was proposed to proceed via a dissociative-interchange mechanisms. 34 references, 5 figures, 1 table
Research Organization:
Nagoya Univ., Japan
OSTI ID:
6344362
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 89:23; ISSN JPCHA
Country of Publication:
United States
Language:
English