synthesis and crystal structure of [pph ] [wos (cuncs) ]

the reaction of [pphj, nos,] with cucl and kscn (1 :3:3) in acetone produces the yell-ow crystals of [pph,], [wos,(cuncs),]. the crystals are triclinic, space group p1(2), z=2, a=12.4823(7), b=12.9224(7), c=18.6395(10)?, ?=83.907(5), ?= 73.152(4), y= 65.194(4)'. the crystal structure was determined by single crystal xray diffraction methods (mo-k ?) and refined by least-squares calculations to a final r-value of 0.062 (r = 0.081) for 1851 unique observed reflections [f>3?|f|]. in [wos (cuncs) ] anion the tungsten and copper atoms have essentially a tetrahedral and trigonal planar co-ordination geometry respectively