Add time:07/24/2019 Source:sciencedirect.com
The crystal structure of HEXAFLUOROACETONE AZINE (cas 1619-84-7) bis(triphenylphosphine)platinum, C42H30F12N2P2Pt, has been determined by single-crystal X-ray diffraction techniques. The compound crystallizes in the monoclinic space group C2/c with a 31.155(3), b 13.091(1), c 21.828(2) Å, β 109.23(1)° and Z = 8. Manual diffractometer methods (Cu radiation, λ 1.54050 Å) were used to obtain 5046 reflections with Inet ⩾ 8 counts sec−1 at 21°C. The structure was solved by the heavy atom method and was refined, including CH2Cl2 at occupancy 0.4 on a crystallographic 2-fold axis, by block-diagonal least-squares methods to R = 0.056. Location of the phenyl hydrogen atoms was not attempted. The platinum atom is σ-bonded to one CN of the azine ligand forming a PtCN three-membered ring. Coordination about platinum consists of a slightly distorted square-planar arrangement of the phosphorus atoms and the bonded carbon and nitrogen atoms of the unsaturated ligand. The observed difference in PtP bond lengths is rationalized in terms of the trans-influence.
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