SUPRAMOLECULAR ARCHITECTURE OF A 1:1 COMPLEX OF 5–AMINOISOPHTHALIC ACID WITH 1,2–BIS(4–PYRIDYL)ETHANE
S.F. Lush1, F.M. Shen2
1General Education Center, Yuanpei University, HsinChu, Taiwan
2Biotechnology, Yuanpei University, HsinChu, Taiwan
Keywords: 5–aminoisophthalic acid, 1,2–bis(4–pyridyl)ethane, hydrogen bonding, centrosymmetric, supramolecular
Abstract
The crystal structure has been solved for a 1:1 molecular complex of 5–aminoisophthalic acid and 1,2–bis(4–pyridyl)ethane. Crystal data: C20H19N3O4, M = 365.38, orthorhombic, P21/n space group; unit cell parameters: a = 10.7521(6) Å, b = 11.9151(6) Å, c = 13.7645(8) Å, V = 1763.40(17) Å3, Z = 4, dx = 1.376 g/cm3, R1 = 0.0514, T = 110 K. The 5–aminoisophthalic acid molecule is linked by O–H···N hydrogen bond to 1,2–bis(4–pyridyl)ethane, forming a linear hydrogen bonded chain running parallel to [0 3 0]. In the crystal, the intermolecular interactions link 5–aminoisophthalic acid molecules with head–to–head N–H···O hydrogen bonds generating R22(14) centrosymmetric dimers, which are extended head–to–tail via amine and carboxyl group N–H···O=C hydrogen bond. The supramolecular structure is consolidated by C–H···O hydrogen bonds and π···π interactions.
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