CRYSTAL-STRUCTURE OF IMETHYL-6-METHOXY-5-IMINOHEPTAN-3-ONATO)COPPER(II)

A new volatile N,O-chelate complex of Cu(II) containing a methoxy grou p was studied by X-ray diffractometry (KUMA automatic diffractometer, MoKalpha radiation for single crystals and DRON-UM1, CuKalpha radiatio n for polycrystals). The structure is molecular and consists of trans- complexes of methyl-6-methoxy-5-iminoheptan-3-onato)copper(II). The st ructure was refined in an anisotropic approximation using 2426 indepen dent reflections to R = 0.048. Crystal data a = 13.426(2), b = 9.566(2 ), c = 19.562(4) Angstrom, beta = 90.72 degrees, space group P2(1)/n, V = 2512.2(8) Angstrom(3), Z = 4, d(calc) = 1.216 g/cm(3). The square- planar environment of the copper atom with distances Cu-O = 1.938 and Cu-N = 1.912 Angstrom is completed to pyramidal by interaction with th e oxygen atom of one methoxy group of the neighboring molecule at a di stance of Cu...O = 281 Angstrom.