Structures of metal complexes with anions of di(hydroxymethyl)phosphinic and di(chloromethyl)phosphinic acids

This paper considers the structural features of complexes containing Ag(I), 3d metals (Cu and Ni), and rare-earth elements (REE) such as La, Nd, Er, a nd Lu, alkaline-earth (Sr) or alkaline (Li, Na) metals with anions of di(hy droxymethyl)phosphinic (L-1) or di(chloromethyl)phosphinic (L-2) acids with a general formula RR'PO2-, where R = R' = OH and Cl for L-1 and L-2, respe ctively. Different patterns of coordination between organophosphorus acids and different metals (four for each L1 and L2) are described. Structures of copper(II) complexes with L-1 and L-2 were compared with those of Cu(II) w ith dialkyl- and diaryl-substituted monophosphonic and aminophosphinic acid s.