Abstract:
Aryl cobaloximes, ArCo(dioxime)2Py (1e9) (Ar ¼ phenyl, 1-naphthyl, 2-naphthyl; dioxime ¼ dmgH, dpgH,
gH) have been synthesized and characterized primarily by NMR and elemental analyses and molecular
structures of four complexes have also been determined crystallographically. The electronic and steric
effects of the aryl ring size and the equatorial dioxime affect the NMR chemical shifts and the X-ray
structural parameters. The cyclic voltammetry study shows that the aryl cobaloximes are reduced
electrochemically more easily as compared to the corresponding alkyl complexes. These complexes have
a robust CoeC bond and are very stable in solution and show no sign of decomposition even on irradiation
under oxygen atmosphere e an unusual property of any organocobaloxime
