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]