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

Abstract

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+·2ClO4− and [(bdppz)Cu(NCMe)]2+·2ClO4− were prepared and structurally characterized. The complex [Zn(bdppy)2]2+·2ClO4− has a higher local concentration of low-valent phosphorus (σ2λ3) on the periphery of the molecule. All the compounds were characterized using 1H, 13C{1H}, 31P{1H} NMR and IR spectroscopy, and X-ray crystallography. The properties of the compound [(bdppz)Cu(NCMe)]2+·2ClO4− were studied using EPR spectroscopy and magnetic susceptibility measurements.