Add time:08/01/2019         Source:sciencedirect.com

Copper(II) complexes with 2-dimethylamino-3- picoline N-oxide (3MDM) and 2-diethylamino-3- picoline N-oxide (3MDE) have been prepared from the following salts: tetrafluoroborate, nitrate, chloride and bromide. Solids of the general formula [CuL2](BF4)2 and [CuLX2] where L=3MDM and 3MDE and X=NO3, Cl and Br were characterized using spectral methods (i.e., IR, UV-Vis and ESR). Both of these N-oxides coordinate as bidentate ligands via the N-oxide oxygen and the amine nitrogen in all of the complexes. The steric effect of the diethylamino group is larger compared to the dimethylamino in the four pairs of complexes involving the different anions. Considerable distortion compared to the complexes of the analogous pyridine N-oxide ligands also occurs due to the ring methyl group.

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