title: Poly[[diaqua-bis(μ(3)-maleato-κO:O,O:O)dicopper(II)] trihydrate].
abstract: In the title compound, {[Cu(2)(C(4)H(2)O(4))(2)(H(2)O)(2)]·3H(2)O}(n), Cu(II) ions with square-pyramidal coordination are bridged by exo-tri-dentate maleate dianions into [Cu(2)(maleate)(2)(H(2)O)(2)](n) layers coincident with the bc crystal plane. The inter-lamellar regions contain hydrogen-bonded cyclic water hexa-mers which facilitate layer stacking into a pseudo-three-dimensional crystal structure. The water hexamers themselves are formed by the operation of crystallographic inversion centers on sets of three crystallographically distinct water molecules of hydration.
authors.affiliation: Lyman Briggs College, Department of Chemistry, Michigan State University, East Lansing, MI 48825, USA.
authors.forename: Gregory A
authors.initials: GA
authors.lastname: Farnum
authors.forename: Robert L
authors.initials: RL
authors.lastname: Laduca