Publication Type:

Journal Article


Organometallics, ACS Publications, Volume 22, Number 2, p.226–232 (2003)



The synthesis and characterization of RCo(gH)2Py (R = methyl through decyl) and XCo(gH)2Py (X = Cl, Br, NO2, N3) is described. Most of these complexes are new and have been synthesized for the first time. The X-ray structure of N3Co(gH)2Py is reported. The cis−trans influence has been studied by 1H and 13C NMR, UV−vis, and X-ray diffraction. For a range of X ligands, a clear trend between the 1H and 13C chemical shifts of the axial and equatorial ligands as well as with the Co-dioxime CT band has been observed. More than 20 correlations have been found. δ(13C) values for CN, Pyα, Pyβ, and Pyγ in the alkylcobaloximes always occur upfield by 1−3 ppm compared to those in the inorganic cobaloximes, and δ(13C) for CN in gH complexes occur significantly upfield, by 12−13 ppm, compared to the values in the corresponding dmgH, chgH, and dpgH complexes.

Cite this Research Publication

B. D. Gupta, Yamuna, R., Singh, V., and Tiwari, U., “Synthesis and characterization of and cis-trans influence in cobaloximes with glyoxime as the equatorial ligand”, Organometallics, vol. 22, pp. 226–232, 2003.