Adducts of 1,1,1-tris(4-hydroxyphenyl)ethane with 1,2-bis(4-pyridyl)ethane and 1,2-bis(4-pyridyl)ethene: continuously interwoven structures in three dimensions

In the adduct 1,2-bis(4-pyridyl)­ethane–1,1,1-tris(4-hydroxy­phenyl)­ethane (1/2), C12H12N2·2C20H18O3, the bipyridyl component lies across an inversion centre in P\overline 1. The tris-phenol mol­ecules [systematic name: 4,4′,4′′-(ethane-1,1,1-triyl)­triphenol] are linked by O—H⋯O hydrogen bonds to form sheets built from R_4^4(38) rings, and symmetry-related pairs of sheets are linked by the bipyridyl mol­ecules via O—H⋯N hydrogen bonds to form open bilayers. Each bilayer is interwoven with two adjacent bilayers, forming a continuous three-dimensional structure. In the adduct 1,2-bis(4-pyridyl)­ethene–1,1,1-tris(4-hydroxy­phenyl)­ethane–methanol (1/1/1), C12H10N2·C20H18O3·CH4O, the mol­ecules are linked by O—H⋯O and O—H⋯N hydrogen bonds into three interwoven three-dimensional frameworks, generated by single spiral chains along [010] and [001] and a triple-helical spiral along [100].