Bis(methyl 3-pyridyl-kappa N-1-carbamate)bis(propionato-kappa O)copper(II)-water (4/1)

The Cu-II centre in the title compound, [Cu(C3H5O2)(2)(C7H8N2O2)(2)].0.25H( 2)O, is situated on an inversion centre and has tetragonally distorted coor dination. It is bonded in a trans-square-planar arrangement to the pyridyl N atoms of two methyl 3-pyridylcarbamate molecules [Cu-N1 2.025(2) Angstrom ] and one carboxylate O atom from each of two propionate anions [Cu-O1 1.95 5(2) Angstrom], The axial positions are occupied by the other propionate O atoms [Cu ... O2 2.653(2) Angstrom]. The propionate groups exhibit very sma ll Ol-Cu ... O2 chelate angles of 54.23 (8)degrees.