Channels with ordered water and bipyridine molecules in the porous coordination polymer {[Cu(SiF6)(C10H8N2)2]oC10N2H8o5H20}n

The coordination polymer {[Cu(SiF6)(C10H8N2)2]o2C10H8N2o5H2O}n, systematic name: poly[[bis(m2-4,4'-bipyridine)(m2-hexafluoridosilicato)copper(II)] 4,4'-bipyridine disolvate pentahydrate], contains pores which are filled with water and 4,4'-bipyridine molecules. As a result of the presence of these ordered species, the framework changes its symmetry from P4/mmm to P21/c. The 4,4'-bipyridine guest molecules form chains inside the 6.5 x 6.9 A ° pores parallel to [100] in which the molecules interact through p-p stacking. Ordered water molecules form infinite hydrogen-bonded chains inside a second pore system (1.6 x 5.3 A ° free aperture) perpendicular to the 4,4'-bipyridine channels.