IR Study of Complexes of Bivalent Metals with 1-Hydroxyethane-1,1-diphosphonic Acid [(C_2H_5)_2NH_2]_2[M(H_2O)_2{CH_3C(OH)(PO_3H)_2}_2]

摘要

A series of isostructural metal complexes with 1-hydroxyethane-1,1-diphosphonic acid H_4L of the composition [(C_2H_5)-2NH_2]_2[M(H_2O)_2(H_2L)_2], M = Mg, Mn, Co, Ni, Zn, Cu, were studied by IR spectroscopy. The dependence of the stretching frequencies of the monodentate phosphonate group PO_3H~- of the lgiand on the nature of the M···O(P) bond was discussed.