Poly[[(μ₄-iminiodiacetato)bis(μ₃-iminodiacetato)lanthanum(III)nickel(II)] monohydrate]

Abstract

Key indicators: single-crystal X-ray study; T = 173 K; mean (C-C) = 0.004 Å; disorder in solvent or counterion; R factor = 0.024; wR factor = 0.062; data-toparameter ratio = 14.4.The Ni II atom in the title compound,by two iminodiacetate dianions and it occupies a special position of site symmetry 1; the [Ni(C 4 H 5 NO 4 ) 2 ] unit functions as a 2 -bridge that links the [La(C 4 H 6 NO 4 )] units into a layer structure. The iminiodiacetate monoanion in the O,O 0 carboxyl -chelated [La(C 4 H 6 -NO 4 )] unit lies about a special position of site symmetry 2; one of the two O atoms is also coordinated to another La atom. The rare-earth atom lies in a bicapped square-antiprismatic environment in the layer coordination polymer.