Add time:08/07/2019         Source:sciencedirect.com

The pentakis complex of copper(II) perchlorate with antipyrine(apy) and the bis complexes with DIANTIPYRYLMETHANE (cas 1251-85-0)(dapy) and diantipyrylpropylmethane(dapyp) have been prepared and characterized. Electronic spectral and ESR data for the distortion isomers of Cu(dapy)2(ClO4)2 show that the red form is more tetrahedral than the orange isomer and that green Cu(dapyp)22+ complexes are more planar than the dapy compounds. Crystal field calculations and electronic spectral data permit a gross estimate of the geometries of dapy and dapyp complexes. The g‖ values for the complexes, which indicate very little metal-ligand covalency, are among the highest ever reported for Cu(II) complexes.

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