title: Three related benzoannelated diazapolyether macrocycles: effects of macrocycle ring size and position of benzo groups on hydrogen bonding of the amine H atoms.
abstract: The benzoannelated diazapolyether macrocycles 6,7,9,10,17,18-hexahydro-5H,11H-8,16,19-trioxa-5,11-diazadibenzo[a,g]cyclopentadecene, C(18)H(22)N(2)O(3), (I), 6,7,9,10,12,13,20,21-octahydro-5H,14H-8,11,19,22-tetraoxa-5,14-diazadibenzo[a,g]cyclooctadecene, C(20)H(26)N(2)O(4), (II), and 6,7,9,10,17,18,20,21-octahydro-16H,22H-5,8,11,19-tetraoxa-16,22-diazadibenzo[a,j]cyclooctadecene 0.3-hydrate, C(20)H(26)N(2)O(4) x 0.304H(2)O, (III), show different patterns of hydrogen bonding. In (I), the amine H atoms participate only in intramolecular hydrogen bonds with ether O atoms. In (II), the amine H atoms form intramolecular hydrogen bonds with the phenoxy ether O atoms and intermolecular hydrogen bonds with alkyl ether O atoms in an adjacent molecule, forming a chain linking the macrocycles together via an R(2)(2)(10) motif. Molecules of (II) were found on a crystallographic twofold axis. In (III), the amine H atoms participate in a hydrogen-bond network with adjacent ether O atoms and with a water molecule [having a partial occupancy of 0.304 (6)] that links the molecules together via a C(2)(2)(7) motif.
authors.affiliation: Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Room 208, Norman, OK 73019-3051, USA.
authors.forename: Gary L N
authors.initials: GL
authors.lastname: Smith
authors.forename: Douglas R
authors.initials: DR
authors.lastname: Powell
authors.forename: Masood A
authors.initials: MA
authors.lastname: Khan
authors.forename: Richard W
authors.initials: RW
authors.lastname: Taylor
mesh_terms: D000588:Amines / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006575:Heterocyclic Compounds, 3-Ring / Q000737:chemistry*; D006860:Hydrogen Bonding; D047028:Macrocyclic Compounds / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation
chemical_list: C523137:6,7,9,10,12,13,20,21-octahydro-5H,14H-8,11,19,22-tetraoxa-5,14-diazadibenzo(a,g)cyclooctadecene; C523138:6,7,9,10,17,18,20,21-octahydro-16H,22H-5,8,11,19-tetraoxa-16,22-diazadibenzo(a,j)cyclooctadecene; C523136:6,7,9,10,17,18-hexahydro-5H,11H-8,16,19-trioxa-5,11-diazadibenzo(a,g)cyclopentadecene; D000588:Amines; D006575:Heterocyclic Compounds, 3-Ring; D047028:Macrocyclic Compounds