Accession Number : AD0706335

Title :   THE EFFECT OF VARIOUS INNER COORDINATION SPHERE LIGANDS ON THE DISSOCIATION RATE OF NICKEL MALONATE COMPLEXES.

Descriptive Note : Technical rept.,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OHIO ULTRASONICS RESEARCH LAB

Personal Author(s) : Hoffmann,Heinz ; Yeager,Ernest

Report Date : 15 MAR 1970

Pagination or Media Count : 37

Abstract : The effects of a number of strongly bonding ligands on the dissociation rates of malonate bidentate nickel complexes have been examined in aqueous nickel malonate solutions using the pressure-step and shock wave relaxation techniques with conductivity readout. The opening of the malonate chelate appears to be the rate controlling step in the dissociation of the malonate. The dissociation rate constant has been compared with the observed shift in the optical absorption peaks for the d-d orbital transitions in the various mixed nickel complexes. On the bases of this comparison the various ligands other than malonate and water in the inner coordination sphere of nickel have been divided into three classes. These effects are discussed in terms of charge on the ligand, crystal field stabilization energies and sigma and pi orbital character of the bonding. (Author)

Descriptors :   (*COMPLEX COMPOUNDS, DISSOCIATION), (*NICKEL COMPOUNDS, COMPLEX COMPOUNDS), SOLUTIONS(MIXTURES), REACTION KINETICS, CHELATE COMPOUNDS, AMINES, PYRIDINES

Subject Categories : Inorganic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE