1,3,5,7-TETRAPHOSPHATRI-CYCLO[3.3.1.1(3,7)]DECANE, P4O4(CF2)2S4 - A CAGE STRUCTURE RELATED TO P4O6

The title structure is formally derived from the P4O6 cage structure b y sulfuration of the P atoms (as in the known structure P4O6S4) and re placement of two bridging O atoms by CF2 groups. The molecule possesse s crystallographic twofold symmetry. The main effect of introducing th e CF2 groups is to widen the remaining P-O-P angles and shorten the P- O bonds; the P-C bonds are longer than the P-O bonds and the P-C-P ang les narrower than the P-O-P angles.