Channels with ordered water and bipyridine mol-ecules in the porous coordination polymer {[Cu(SiF)(CHN)]·2CNH·5HO} .

The coordination polymer {[Cu(SiF)(CHN)]·2CHN·5HO} , systematic name: poly[[bis-(μ-4,4'-bi-pyridine)(μ-hexa-fluorido-silicato)copper(II)] 4,4'-bi-pyridine disolvate penta-hydrate], contains pores which are filled with water and 4,4'-bi-pyridine mol-ecules. As a result of the presence of these ordered species, the framework changes its symmetry from 4/ to 2/. The 4,4'-bi-pyridine guest mol-ecules form chains inside the 6.5 × 6.9 Å pores parallel to [100] in which the mol-ecules inter-act through π-π stacking. Ordered water mol-ecules form infinite hydrogen-bonded chains inside a second pore system (1.6 × 5.3 Å free aperture) perpendicular to the 4,4'-bi-pyridine channels.