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

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+ ·2ClO 4 − , [(bdppz)Cu(NCMe)] 2+ ·2ClO 4 − were prepared and structurally characterized. The complexes [Zn(bdppy) 2 ] 2+ ·2ClO 4 − is with the higher local concentration of low-valent phosphorus (σ 2 λ 3 ) on the periphery of the molecule. 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+ ·2ClO 4 − and [(bdppz)Cu(NCMe)] 2+ ·2ClO 4 − were prepared and structurally characterized. The complex [Zn(bdppy) 2 ] 2+ ·2ClO 4 − has a higher local concentration of low-valent phosphorus (σ 2 λ 3 ) on the periphery of the molecule. All the compounds were characterized using 1 H, 13 C{ 1 H}, 31 P{ 1 H} NMR and IR spectroscopy, and X-ray crystallography. The properties of the compound [(bdppz)Cu(NCMe)] 2+ ·2ClO 4 − were studied using EPR spectroscopy and magnetic susceptibility measurements.