title: [4,4'-(Ethane-1,2-diyldinitrilo)-bis-(pent-2-en-2-olato)]copper(II) 0.25-hydrate.
abstract: In the title compound, [Cu(C(12)H(18)N(2)O(2))]·0.25H(2)O, the coordination of the O,N,N',O'-tetra-dentate ligand results in a cis-CuN(2)O(2) square-planar geometry for the metal ion and the presence of two six-membered and one five-membered chelate rings. The complete complex mol-ecule is close to planar (r.m.s. deviation = 0.047 Å). The uncoordinated water mol-ecule (O-atom site symmetry 2) was modelled as half occupied. In the crystal, C-H⋯O(w) and O(w)-H⋯O (w = water) hydrogen bonds link the components into layers parallel to ab plane.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Aslam
authors.forename: Itrat
authors.initials: I
authors.lastname: Anis
authors.forename: Nighat
authors.initials: N
authors.lastname: Afza
authors.forename: Ajaz
authors.initials: A
authors.lastname: Hussain
authors.forename: Waseem
authors.initials: W
authors.lastname: Ahmed
authors.forename: Muhammad Nadeem
authors.initials: MN
authors.lastname: Arshad