Aj. Lough et al., Chains of fused rings in the hydrogen-bonded structure of meso-6,13-diamino-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane-2,2 '-biphenol (1/2), ACT CRYST C, 56, 2000, pp. 859-861
The title compound is a salt, [C12H32N6](2+). 2[HOC6H4C6H4O](-). The centro
symmetric cation contains two intramolecular ND H ... N hydrogen bonds with
an N ... N distance of 2.8290 (13) Angstrom, and the pendent amino groups
are in axial sites; the anion contains an intramolecular O-H ... O hydrogen
bond with an O ... O distance of 2.4656 (11) Angstrom. The ions are linked
into continuous chains by means of four types of N-H ... O hydrogen bonds
with N ... O distances ranging from 2.7238 (12) Angstrom to 3.3091 (13) Ang
strom, associated with N-H ... O angles in the range 148-160 degrees.