title: Structure of a 2,6-pyridinophane.
abstract: 2,5,11,14-Tetraoxa-19,20-diazatricyclo-[13.3.1.1(6,10)] icosa-1(19),6,8,10(20),15,17-hexaene, C14H14N2O4, Mr = 274.3, monoclinic, P2(1)/c, a = 9.354(2), b = 9.011(3), c = 7.954(2) A, beta = 101.75(2) degrees, V = 656.4(6) A3, Z = 2, Dx = 1.388 g cm-3, lambda(Mo K alpha) = 0.71073 A, mu = 0.97 cm-1, F(000) = 288, T = 299 K, R = 0.035 for 834 observations with I greater than 3 sigma(I). The molecule lies on an inversion center and is in the anti or stepped conformation. The ethylene glycol chains are fully extended, and the two N-C-O-C torsion angles about the ring-O bonds are near zero, 1.6(2) and -2.3(2) degrees.
authors.affiliation: Department of Chemistry, University of South Florida, Tampa 33620.
authors.forename: G R
authors.initials: GR
authors.lastname: Newkome
authors.forename: T
authors.initials: T
authors.lastname: Kawato
authors.forename: F R
authors.initials: FR
authors.lastname: Fronczek
mesh_terms: D001372:Aza Compounds / Q000737:chemistry*; D001952:Bridged-Ring Compounds / Q000737:chemistry*; D015394:Molecular Structure; D014961:X-Ray Diffraction
chemical_list: D001372:Aza Compounds; D001952:Bridged-Ring Compounds; C068781:2,6-pyridinophane