NMR and indo study of Ni(II) complexes of acetic and propionic acid

The combined use of NMR spin-lattice relaxation and contact shift to investigate the conformational and dynamical properties of Nickel acetate and propionate complexes is reported. The analysis of the C-13 and H-1 contact shift together with INDO MO calculations gave information on the delocalization mechanism and geometries of the complexes. From these geometries, and by means of C-13 and H-1 spin lattice relaxation spectroscopy the correlation time for Ni-ligand dipolar interaction was calculated and found to be identical to the Ni2+ electron spin lattice relaxation time.