Pi. Coupar et al., HYDROGEN-BONDED CHAINS IN 4,4'-DIHYDROXYBENZOPHENONE-4,4'-BIPYRIDYL-(1 1) AND CHAINS OF RINGS IN 1,3,5-TRIHYDROXYLBENZENE-4,4'-BIPYRIDYL-(2/3)/, Acta crystallographica. Section C, Crystal structure communications, 52, 1996, pp. 2524-2528
In the 1:1 adduct of 4,4'-dihydroxybenzophenone and 4,4'-bipyridyl, [O
C(C6H4OH)(2)].(NC5H4-C5H4N>, the components are linked into chains by
O-H ... N hydrogen bonds. In the 2:3 adduct formed between 1,3,5-trihy
droxybenzene and 4,4'-bipyridyl, 2[C6H3(OH)(3)].3(NC5H4-C5H4N), pairs
of molecules of each component are linked by O-H ... N hydrogen bonds
into macrocyclic rings, which are themselves linked by further 4,4/-bi
pyridyl molecules into chains of rings; these chains are cross-linked
by C-H ... O hydrogen bonds.