Étude cristallographique et vibrationnelle de complexes metalliques de l'acide aminométhylphosphonique

Abstract

The crystalline structure of the complex between Zn(II) and aminomethylphosphonic acid [Zn(AMPh) 2· 4H 2O] is described. This complex crystallizes as an orthorhombic system (space group Pca2 1, a = 10.001 ± 0.002, b = 12.140 ± 0.002, c = 10.281 ± 0.002 Å; Z = 4). Zinc is tetrahedral and coordinated with 4 oxygen atoms of 4 phosphonic groups. The IR spectra of this complex and its N-deuterated derivative in the solid state are analysed in relation to its structure. By comparison, a vibrational study of two other complexes showed Mn(II) gives the same type of coordination as Zn(II), but Cu(II) binds with both phosphonic and amino groups.