Kinetic studies on thiocyanate substitution in dimeric halo Schiff base chromium (III)complexes - a correlation of rates and strain energies

The kinetics and mechanism of thiocyanate substitution in dimeric chromium (III) complexes Cr/sub 2/L/sub 2/Cl/sub 2/and Cr/sub 2/L/sub 2/sup 11/Cl/sub 2/ where L/sup 1/=C/sub 18/H/sub 19/N/sub 3/O/sub 2/ (deprotonated Schiff base derived from N,N Bis (2-amino ethyl) 1,3 propane diamine and salicylaldehyde) have been studied spectrophotometrically at 20 degree centigrade in ammonium thiocyanate medium in the concentration range 0.2-1.0 mo dm-3. These have been found to increase with the increase in derived strain energies of the metal-ligand rings in the complexes. (author)