
TY  - JOUR
A1  - Renfrew, RW 
A1  - Osvath, P 
A1  - Weatherburn, DC 
T1  - Kinetic studies on the substitution reactions of (Pyridine-2-carbaldehyde 2'-pyridylhydrazone)nickel(II). A study of stacking interactions in outer-sphere complexes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1980
VL  - 33
IS  - 1
SP  - 45
EP  - 55
KW  - 
UR  - https://doi.org/10.1071/CH9800045 
N2  - Kinetics of the formation reactions of the mono and bis complexes of pyridine-2-carbaldehyde 2'-pyridylhydrazone (paphy) with nickel((II), the mono complex of 6-methylpyridine-2-carbaldehyde2'-pyridylhydrazone (mpaphy) with nickel(II), and of the ternary complexes of Ni(paphy)2+ with terpy, bpy, phen and pada and Ni(paphy)2+ and Ni(phen)2+ with mpaphy have been studied inaqueous solution at 25&#176;C and ionic strength 0.1 mol dm-3 (NaNO3). The rates of the formationreactions of the mono complexes are slower than expected on the basis of the usual water-loss mechanism, and ring closure probably contributes to the observed rates. The formation of the bisand ternary complexes is usually more rapid than predicted by the water-loss mechanism. The enhanced rates are attributed to large outer-sphere association constants due to 'stacking' interactions between the incoming and bound ligands. 
ER  -

