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1 Bulletin of the Polish Academy of Sciences. Chemistry

1 2002

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Crystal and molecular structure of tetra(triphenylphosphine oxide) sodium hexafluorophosphate

Trzeciak A. M., Lis T., Wojtków W., Ziółkowski J. J.

Bulletin of the Polish Academy of Sciences. Chemistry

2002

Vol. 50, No. 1

27-35

The complex compound of [Na(OPPh3)4]PF(6) formula was obtained in the reaction of triphenylphosphine oxide (OPPhs) with sodium hexafluorophosphate (NaPFg) in dichloromethane (CH(2)Cl(2). The slow crystallization at room temperature produced crystals suitable for X-ray analysis. Crystals are triclinic, space group P1 with a = 12.035(3), b= 14.268(3), c = 19.397(4) A, Alfa = 72.72(2), beta = 89.14(2), gamma = 88.29(2)°, V = 3178.9(12 A3 and Z = 2 at 100 K. The sodium cation is surrounded by four oxygen atoms of OPPh(3) ligands in a tetrahedral fashion. The slight difference of Na-O distances (2.207(2)-2.239(2) A) as well as remarkable difference of P-O-Na angles (137.37(7)-172.55(9)°) found in [Na(OPPh3)4J+ cation are explained by formation of intramolecular C-H.. .O interactions as well as intermolecular interactions of C-H.. .F type between phenyl rings and fluorins of PF-(6).