102 research outputs found
Study Of Hydrogen Bondings In Phenol-Amine Adducts [QP517.H93 M991 2008 f rb].
Lima sampel telah disediakan bagi tujuan mengkaji transisi fasa yang disebabkan oleh ikatan hidrogen di dalam sebatian fenol-amina.
Five samples have been prepared to study the phase transition caused by hydrogen bonds in phenol-amine adducts
Crystal structure of bromidobis(naphthalen- 1-yl)antimony(III)
In the title compound, [SbBr(C10H7)2], the SbIII atom has a
distorted trigonal–pyramidal coordination geometry and the
planes of the two naphthalene ring systems make a dihedral
angle of 80.26 (18)�. An intramolecular C—H� � �Br hydrogen
bond forms an S(5) ring motif. In the crystal, weak C—H� � �Br
interactions link the molecules into helical chains along the baxis
direction
(2,2′-Bipyridyl-κ2 N,N′)chlorido(dl-threoninato-κ2 N,O 1)copper(II) monohydrate
In the title compound, [Cu(C4H8NO3)Cl(C10H8N2)]·H2O, the CuII atom is in a slightly distorted square-pyramidal coordination geometry with the basal plane defined by the two N atoms of the bipyridine ligand and the N and O atoms from the threoninate ion and the apical site occupied by the Cl atom. In the crystal, intermolecular O—H⋯O, N—H⋯O, O—H⋯Cl, C—H⋯O and C—H⋯Cl interactions link the molecules into a three-dimensional network. A π–π interaction with a centroid–centroid distance of 3.461 (1) Å is also present
3,3′-[1,2-Phenylenebis(methylene)]bis(1-ethyl-1H-benzimidazol-1-ium) bis(hexaflourophosphate)
In the title compound, C26H28N4
2+·2PF6
−, the complete cation is generated by a crystallographic twofold axis. The benzimidazole ring is almost planar (r.m.s. deviation = 0.0207 Å) and makes dihedral angles of 50.12 (2)° with its symmetry-related component and 65.81 (2)° with the central benzene ring. In the crystal, molecules are linked into a three-dimensional network by C—H⋯F interactions. A π–π interaction with a centroid–centroid distance of 3.530 (1) Å is observed. Four F atoms of the hexafluorophosphate anion are disordered over two sets of sites in a 0.889 (6):0.111 (6) ratio
3,3′-Dicyclopentyl-1,1′-(1,3-phenylenedimethylene)dibenzimidazol-1-ium bis(hexafluorophosphate)
In the title compound, C32H36N4
2+·2PF6
−, the cation and the anions each have crystallographic twofold rotation symmetry. The benzimidazole ring is almost planar [r.m.s. deviation = 0.0161 (1) Å] and makes a dihedral angle of 5.77 (4)° with its symmetry-related component and a dihedral angle of 80.96 (5)° with the central benzene ring. The cyclopentyl ring adopts a half-chair conformation. In the crystal, molecules are linked into a three-dimensional network through C—H⋯F hydrogen bonds. A C—H⋯π interaction is also observed
9-(Pent-4-enyl)anthracene
In the title compound, C19H18, the anthracene system is almost planar, with a maximum deviation of −0.039 (1) Å. The structure is stabilized by C—H⋯π interactions. The pentene moiety is not planar and is twisted away from the attached anthracene system with a maximum torsion angle of 91.2 (1)°
3-[5-(2,4-Dichlorophenyl)-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-4-hydroxy-2H-chromen-2-one
In the title compound, C24H16Cl2N2O3, the chromene ring system is almost planar, with a maximum deviation of 0.042 (1) Å. It makes dihedral angles of 3.72 (6), 73.37 (5) and 12.00 (5)° with the dihydropyrazole, benzene and phenyl rings, respectively. An intramolecular O—H⋯N hydrogen bond forms an S(6) ring motif. In the crystal, molecules are linked via C—H⋯O interactions, forming an infinite chain along the a axis. The crystal packing is further stabilized by a π–π stacking interaction [centroid–centroid distance = 3.5471 (7) Å] and a Cl⋯Cl short contact [Cl⋯Cl = 3.214 (1) Å]
(E)-4-Hydroxy-N′-(2-methoxybenzylidene)benzohydrazide
In the title compound, C15H14N2O3, the dihedral angle between the benzene rings is 66.56 (5)°. In the crystal, N—H⋯O, O—H⋯O and C—H⋯O interactions link the molecules into a three-dimensional network. A π–π interaction, with a centroid–centroid distance of 3.628 (6) Å, helps to establish the packing
5-[(E)-2-Bromobenzylidene]-8-(2-bromophenyl)-2-hydroxy-10-methyl-3,10-diazahexacyclo[10.7.1.13,7.02,11.07,11.016,20]henicosa-1(20),12,14,16,18-pentaen-6-one
In the title compound, C33H26Br2N2O2, the piperidine group adopts an envelope conformation while the two pyrrolidine groups adopt half-chair and envelope conformations. The dihydroacenaphthylene group is almost planar, with a maximum deviation of 0.105 (1) Å. The dihedral angle between the two bromophenyl rings is 60.19 (8)°. An intramolecular O—H⋯N interaction is observed, generating an S(5) ring motif. The crystal structure is stabilized by intermolecular C—H⋯O interactions. Short Br⋯Br [3.461 (1) Å] and Br⋯C [3.322 (2) Å] intermolecular contacts are observed, as well as π–π interactions [centroid–centroid distance = 3.793 (1) Å]
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