Abstract
One of a series of compounds obtained by the reaction of chloropentacarbonylrhenium(I) with β-diketones has been shown by single crystal X-ray diffraction to be bis(μ-O-1,3-diphenylpropane-1,3-dionatotricarbonylrhenium(I)). The crystals are monoclinic with lattice parameters a = 11.988(A) Å, b = 14.441(9) Å, c = 10.298(7) Å, β = 115.25(7)°. The space group is P21/c and there are two dimers per unit cell. A total of 1563 independent reflections were measured on a single crystal X-ray diffractometer and the structure was refined by least squares analysis to a weighted R2 value of 0.0427. The dimer units are held together by two bridging oxygen atoms, one from each of the β-ketoenolate groups; the distance of the bridging oxygen from the rhenium atom to which it is chelated (2.162(9) Å) is shorter than the distance to the other rhenium atom (2.204(7) Å). The main part of the β-ketoenolate ring is 37° from the OReO plane.
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