Structural Change and Hydrophobic Interaction as Related to Unusual Stability Constants of Copper(II) Complexes with 2,2'-Bipyridyl and Substituted 1,10-Phenanthrolines

摘要

Unusual values of K_1 and K_2 for the formation of complexes CuL_2 with L = 2,2'-bipyridyl (bpy) and substituted 1,10-phenanthrolines (phen) have been discussed in relation to the structural change from CuL to CuL_2 and the hydropho-bic interaction between the coordinated ligands.The free energy for the structural change from the distorted octahedral CuL_2 to the trigonal bipyramidal CuL_2 has been estimated to be 0.80 (-4.5 kJ mol~(-1)) for L = bpy and 0.47 (-2.7 kJ mol~(-1)) for L = phen.