Synthesis and structural characterization of 2,6-bis(1,2,4-diazaphospholyl-1-yl)pyridine zinc and 2,6-bis( 1,2,4-diazaphospholyl-1-yl)pyrazine copper complexes

摘要

Several novel derivatives of mono- and bis(1,2,4-diazaphosphol-1-yl)pyridine (or pyrazine) as well as the first 2,6-bis(1,2,4-diazaphosphol-1-yl)pyridine (bdppy) and 2,6-bis(1,2,4-diazaphosphol-1-yl)pyrazine (bdppz) metal complexes [Zn(bdppy)2](2+)center dot.2ClO(4)(-) and [bdppz)Cu(NCMe)](2+)center dot 2ClO(4)(-) were prepared and structurally characterized. The complex [Zn(bdppy)(2)](2+)center dot.2ClO(4)(-) has a higher local concentration of low-valent phosphorus (sigma(2)lambda(3)) on the periphery of the molecule. All the compounds were characterized using H-1, C-13{H-1}, P-31{H-1} NMR and IR spectroscopy, and X-ray crystallography. The properties of the compound [(bdppz)Cu(NCMe)](2+)center dot 2ClO(4)(-) were studied using EPR spectroscopy and magnetic susceptibility measurements. (C) 2014 Elsevier Ltd. All rights reserved.