X-RAY CRYSTAL-STRUCTURE OF [1,2-BIS(DIPHENYLPHOSPHINO)ETHANE]BIS(3,5-DIMETHYL-PYRAZOLE-N)PLATINUM(I I) TETRAFLUOROBORATE DICHLOROMETHANE SOLVATE, [(PH2PCH2CH2PPH2)PT(3,5-ME2PZH)2][BF4]2.CH2CL2

The crystal structure of the compound [(Ph2PCH2CH2PPh2)Pt(3,5-Me2pzH)2][BF4]2·CH2Cl2 has shown that the ligands around the Pt atom are approximately in a square planar coordination, whereas the pyrazole rings point roughly in the same direction, away from the coordination plane. This unusual conformation is probably due to the hydrogen bonds with fluorine atoms of the BF4- anion. Bond distances and angles are compared with those in other pyrazole complexes.