
TY  - JOUR
A1  - Ang, L 
A1  - Graddon, DP 
T1  - Thermodynamics of Metal-Ligand Bond Formation. XVIII Addition of Heterocyclic Bases to Copper(II) and Cobalt(II) Schiff Base Complexes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1976
VL  - 29
IS  - 3
SP  - 565
EP  - 571
KW  - 
UR  - https://doi.org/10.1071/CH9760565 
N2  - Thermodynamic data are reported for reaction of heterocyclic bases in benzene solution with four-coordinate copper(11) and cobalt(11) Schiff base complexes and also with a five-coordinate nickel(11) complex. The cogper(11) complexes form adducts of low stability with pyridine or 4-methylpyridine, K &#8776; 21. mol-1, &#916;Hº &#8776; -20 kJmol-l. The cobalt(11) complexes add two molar proportions of base successively     1 < K1 &#8804; K2 < 101.mol-1     &#916;H1º &#8776; &#916;H2º &#8776; -20 kJ mol-1  They also form adducts with 2,2'-bipyridine     30 < K < 600      &#916;Hº &#8776; -40kJ mol-1  The nickel(11) complex forms more stable adducts with unidentate bases, K &#8776; 1001. mol-l, &#916;Hº &#8776; 70 kJ mol-1. Comparison of the three metals indicates that differences between the stabilities of their base adducts can be attributed mainly to entropy factors. 
ER  -

