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Synthesis and characterization of and cis-trans influence in cobaloximes with glyoxime as the equatorial ligand

Publication Type : Journal Article

Thematic Areas : Advanced Materials and Green Technologies

Publisher : ACS Publications

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

Url : http://pubs.acs.org/doi/abs/10.1021/om020331f

Campus : Coimbatore

School : School of Engineering

Center : Center for Excellence in Advanced Materials and Green Technologies

Department : Chemistry, Civil, Sciences

Year : 2003

Abstract : 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, Dr. 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.

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