Bis(N-1,2,4-diazaphosphol-1-yl)methanes and the related copper and cobalt complexes

•A family of new bis(N-1,2,4-diazaphosphol-1-yl)methanes (bdpm) were prepared.•It has been demonstrated that bdpm can be used as ligands for preparation of metal complexes.•Copper and cobalt complexes with bdpm ligand were studied by the EPR spectroscopy and magnetic susceptibility.

Several novel derivatives of bis(N-1,2,4-diazaphosphol-1-yl)methane (bdpm) as well as the first bis(N-1,2,4-diazaphosphol-1-yl)methane metal complexes [Cu(bdpm)2(H2O)2]2+·2ClO4−, [(bdpm)Cu(μ-Cl)Cl]2, and [(bdpm)CoCl2] were prepared and structurally characterized. The complex [Cu(bdpm)2(H2O)2]2+·2ClO4− is with the higher local concentration of low-valent phosphorus(σ2λ3) on the periphery of the molecule. All compounds were characterized using 1H, 13C{1H}, 31P{1H} NMR, IR spectroscopy, and X-ray crystallography. The properties of compounds [Cu(bdpm)2(H2O)2]2+·2ClO4−, [Cu(bdpm)(μ-Cl)Cl], and [Co(bdpm)Cl2] were studied by the EPR spectroscopy and magnetic susceptibility.

Graphical abstractBis(N-1,2,4-diazaphosphol-1-yl)methane (bdpm) and the related complexes [Cu(bdpm)2(H2O)2]2+·2ClO4−, [(bdpm)Cu(μ-Cl)Cl]2, and [(bdpm)CoCl2] were synthesized. The EPR and magnetic study showed that [Cu(bdpm)2(H2O)2]2+·2ClO4− with a dx2-y2dx2-y2 Cu(II) ion is paramagnetic.Figure optionsDownload full-size imageDownload as PowerPoint slide