Crystal and molecular structures of strontium(II)tricopper(II) propionate trihydrate

A novel heterometallic propionic acid compound SrCu3(C2H5COO)(8). 3H(2)O is prepared and characterized by X-ray crystallography [DAR-UMB diffractomete r, T = 293(2) K, CuKalpha radiation, R = 0.094 for 5150 independent reflect ions with I > 2 sigma(I)]. The structure contains two crystallographically nonequivalent copper(II) dimers and an insular dinuclear [Sr-2(Prop)(4)(H2O )(6)] complex, all combined into a three-dimensional framework by the bridg ing carboxy groups of the propionate ions. The strontium coordination polyh edron (C.N. 9) is shaped like a 4,4,4-tricapped trigonal prism. The methyl groups of two propionate ions are disordered.