Poly[[diaquabis(μ2-crotonato-κ3O:O,O′)(crotonato-κ2O,O′)lanthanum(III)] adenine monosolvate monohydrate]

Abstract

The asymmetric unit of the title compound, {[La(C4H5O2)3(H2O)2]·C5H5N5·H2O}n, consists of an LaIIIcation, three crotonate (but-2-enoate) anions and two coordinated water molecules forming the neutral complex, completed by an external adenine molecule and one hydration water molecule. The LaO10coordination polyhedra, connected through the sharing of a single edge, form isolated chains running along the [100] direction. These one-dimensional structures are characterized by two different centrosymmetric La2O2loops, with La...La distances of 4.5394 (6) and 4.5036 (6) Å. The unbound adenine and water solvent molecules form a highly planar hydrogen-bonded array parallel to (110) (r.m.s. deviation from the mean plane < 0.10 Å) which intersects the isolated La–crotonate chains in a slanted fashion to form an extremely connected hydrogen-bonded three-dimensional structure.