Di-(mu-pyrazolato-N:N')-bis[(2,2'-bipyridine-N,N')platinum(II)] bis(tetrafluoroborate) monohydrate

The crystal structure of [Pt-2(C3H3N2)(2)(C10H8N2)(2)](BF4)(2).H2O, has been determined by X-ray diffraction. The six-membered ring consisting of the two Pt atoms and the four pyrazolyl N atoms has a boat-shaped conformation in which each Pt atom is located 1.14 (1) Angstrom above the plane defined by the four pyrazolyl N atoms. The two platinum coordination planes are canted at an angle of 77.9 (3)degrees, which is 8.1 (6)degrees smaller than the dihedral angle between the two bipyridyl planes. The dihedral angle between the two pyrazolyl planes is 83.4 (6)degrees. These angular strains are found to be caused by the intramolecular steric repulsion between the bipyridyl H and pyrazolyl N atoms.