Crystal engineering using tris-phenols.: Cross-linked, pairwise-interwoven two-dimensional nets in the 2:1 adduct of 1,1,1-tris(4-hydroxyphenyl)ethane with 1,2-diaminoethane

In 1,1,1-tris(4-hydroxyphenyl)ethane-1, 2-diaminoethane (2/1), [CH3C(C6H4OH)(3)](2).H2NCH2CH2NH2 (1), triclinic, P (1) over bar, with Z = 2, a = 10.9430(12), b = 11.1075(12), c = 15.249(2) Angstrom, alpha = 98.672(15), beta = 96.312(10), gamma = 98.377(13)degrees, the tris-phenol units form continuous two-dimensional nets, built from pseudohexagonal R-4(4)(38) rings, interwoven pairs of which are cross-linked by the Id-diaminoethane units. Each tris-phenol unit acts as a triple donor, forming two O-H...O and one O-H...N hydrogen bonds, and as a double acceptor in two O-H...O hydrogen bonds: the diamine unit, in which the CH2 groups are disordered over two sets of sites with site-occupation factors of 0.740(5) and 0.260(5), respectively, acts as a double acceptor only and the N-H bonds play no role in the hydrogen bonding. The O...O distances in the O-H...O hydrogen bonds are 2.642(2), 2.690(2), 2.810(2) and 2.835(2) Angstrom, and the two independent 0 N distances are both 2.665 (3) Angstrom. Adjacent bilayers are connected into a continuous three-dimensional array by C--H O hydrogen bonds, all having a C...O distance of 3.468 (4) Angstrom.