Ej. Maclean et al., Hexamethylenetetramine is a fourfold acceptor of O-H center dot center dotcenter dot N hydrogen bonds in its 1 : 2 adduct with 2,2 '-biphenol, ACT CRYST C, 55, 1999, pp. 1867-1870
In hexamethylenetetramine-2,2'-biphenol (1/2), C6H12-N-4. 2C(12)H(10)O(2),
the biphenol acts as a double donor of O-H ... N hydrogen bonds and the hex
amethylenetetramine acts as a fourfold acceptor. The molecules are assemble
d into deeply puckered pseudo-tetragonal nets built from R-8(8)(44) rings.