Abstract
Powder and single-crystal X-ray diffraction study of cis-bis(pivalyltrifluoro-acetonato)copper(II) has been performed (Bruker AXS P4 automatic diffractometer, MoKβ radiation, t = −25°C). Crystal data for C16H20CuF6O4: a= 9.980(7) A, b = 19.236(13) A, c = 20. 771(14) A, space group Pbca, V = 3987(5) A3, Z = 8, dcalc = 1.512 g/cm3. The square-planar environment of the Cu atom (Cu-Oav 1.904 A, =O-Cu-Oav 92.4°) is completed to bipyramidal by the atoms of the neighboring molecules, Cu...F 2.78 A and Cu...Cγ 3.30 A. The complex forms centrosymmetric pseudo dimers with Cu...Cu distances of 4.59 A.
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