2-Bromo-acetamide.

The title compound, CHBrNO, crystallizes in the monoclinic space group 2/ with one mol-ecule in the asymmetric unit. The almost planar mol-ecules are organized N-H⋯O hydrogen bonds into a ladder-type network, which can be characterized by the graph sets (8) and (8). In addition, the mol-ecules are connected by C-H⋯O and C-H⋯Br contacts.

,'-[1,4-Phenyl-enebis(imino-carbon-yl)]bis-(l-phenyl-alanine) tetra-hydro-furan disolvate.

The title compound, CHNO·2CHO, representing a bis-urea with terminal phenyl-alanine units, crystallized with two tetra-hydro-furan (THF) mol-ecules. The main mol-ecule is located on a crystallographic twofold axis, while the solvent mol-ecule is disordered over two positions, with occupancies of 0.571 (15) and 0.

Formation of a macrocycle from di-chloro-dimethyl-silane and a pyridoxalimine Schiff base ligand.

The reaction of di-chloro-dimethyl-silane with a polydentate Schiff base ligand derived from pyridoxal and 2-ethano-lamine yielded the macrocyclic silicon compound (8,22)-4,4,12,18,18,26-hexa-methyl-3,5,17,19-tetra-oxa-8,13,22,27-tetra-aza-4,18-disilatri-cyclo-[22.4.0.

Crystal structure of 9,9-di-ethyl-9-fluorene-2,4,7-tricarbaldehyde.

The title compound, CHO, crystallizes in the space group 2/ with one mol-ecule in the asymmetric unit of the cell. The fluorene skeleton is nearly planar and the crystal structure is composed of mol-ecular layers extending parallel to the (302) plane. Within a layer, one formyl oxygen atom participates in the formation of a C-H⋯O bond, which is responsible for the formation of an inversion symmetric supra-molecular motif of graph set (10).

Crystal structures of 2-[3,5-bis-(bromo-meth-yl)-2,4,6-tri-ethyl-benz-yl]isoindoline-1,3-dione and 2-{5-(bromo-meth-yl)-3-[(1,3-dioxoisoindolin-2-yl)meth-yl]-2,4,6-tri-ethyl-benz-yl}isoindoline-1,3-dione.

The title compounds, CHBrNO () and CHBrNO (), crystallize in the space group 2/ with two ( and ) and one mol-ecules, respectively, in the asymmetric unit of the cell. The mol-ecular conformation of these compounds is stabilized by intra-molecular C-H⋯O hydrogen bonds and C-H⋯N or C-H⋯π inter-actions. The crystal structure of features a relatively strong Br⋯O=C halogen bond, which is not observed in the case of .

Bis-(triphenylphosphane) Aluminum Hydride: A Simple Way to Provide, Store, and Use Non-Polymerized Alane for Synthesis.

AlH (PPh ) was synthesized as a stable solid being the first known 1 : 2 alane arylphosphane adduct. Although only weakly intra-molecularly coordinated, it displays as a molecular crystal significant inertness against atmospheric humidity and oxygen due to strong steric screening of the alane unit. The compound readily dissociates PPh in solution allowing for its use as a Lewis acidic reducing agent.

Crystal structure of a methanol solvate of a macrocycle bearing two flexible side-arms.

Di--butyl ,'-{[13,15,28,30,31,33-hexa-ethyl-3,10,18,25,32,34-hexa-aza-penta-cyclo-[25.3.1.

The heteroscorpionate ligand 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethanol and an easy preparation of its tungsten complex.

The heteroscorpionate ligand 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethanol, CHNO, features in the solid state an intramolecular O-H...

Different supramolecular interactions mediated by Br atoms in the crystal structures of three anisole derivatives.

Three anisole building blocks featuring bis(hydroxymethyl) or bis(bromomethyl) pendants have been analyzed with regard to their molecular structures and packing behaviour. The compounds are ethyl 3,5-bis(hydroxymethyl)-4-methoxybenzoate, CHO, (I), [5-bromo-3-(hydroxymethyl)-2-methoxyphenyl]methanol [or 4-bromo-2,6-bis(hydroxymethyl)anisole], CHBrO, (II), and 5-bromo-1,3-bis(bromomethyl)-2-methoxybenzene [or 4-bromo-2,6-bis(bromomethyl)anisole], CHBrO, (III). A typical supramolecular pattern involved C-H.

Two reversible enantiotropic phase transitions in a pentacoordinate silicon complex with an O,N,O'-tridentate valinate ligand.

Dimethyl[N-(4-oxidopent-3-en-2-ylidene)valinato-κ(3)O,N,O']silicon(IV), C12H21NO3Si, (II), crystallizes in the orthorhombic space group P2₁2₁2₁. The chiral compound undergoes two sharp enantiotropic phase transitions upon cooling. The first transformation occurs at 163 K to yield a unit cell with one axis having double length.

Crystal structure of 4'-bromo-2,3,5,6-tetra-fluoro-biphenyl-4-carbo-nitrile.

The title compound, C13H4BrF4N, synthesized from 1,4'-bromo-iodo-benzene and 4-bromo-2,3,5,6-tetra-fluoro-benzo-nitrile in a coupling reaction was found to crystallize in the ortho-rhom-bic space group P212121. The two phenyl rings are rotated with respect to each other by 40.6 (6)°.

5,8-Bis[bis-(pyridin-2-yl)amino]-1,3,4,6,7,9,9b-hepta-aza-phenalen-2(1H)-one dimethyl sulfoxide monosolvate dihydrate.

In the asymmetric unit of the title compound, C26H17N13O·C2H6OS·2H2O, there is one independent hepta-zine-based main mol-ecule, one dimethyl sulfoxide mol-ecule and two water mol-ecules as solvents. The tri-s-triazine unit is substituted with two dipyridyl amine moieties and a carbonylic O atom. As indicated by the bond lengths in this acid unit of the hepta-zine derivative [C=O = 1.

Photochemical dimerization of a fluorinated dibenzylideneacetone in chloroform solution.

(1E,4E)-1,5-Bis(2,6-difluorophenyl)penta-1,4-dien-3-one, C17H10F4O, (I), dimerizes under sunlight in chloroform solution to form the corresponding cyclobutane derivative, (2E,2'E)-1,1'-[2,4-bis(2,6-difluorophenyl)cyclobutane-1,3-diyl]bis[3-(2,6-difluorophenyl)prop-2-en-1-one], C34H20F8O2, (II). The crystal structure of (I) explains why no topochemical dimerization can occur in the solid state. In the solid, molecules of dimer (II) show the `truxillic acid'-type arrangement of crystallographic centres of inversion, with half a molecule per asymmetric unit and cell dimensions closely related to those of the monomer.

Enantiotropic phase transition in a binuclear tin complex with an O,N,O'-tridentate ligand.

The crystal structure of chlorido{μ-2-[(2-oxidobenzylidene)amino]ethanolato-κ(4)O,N,O':O'}{2-[(2-oxidobenzylidene)amino]ethanolato-κ(3)O,N,O'}trivinylditin(IV), [Sn2(C2H3)3(C9H9NO2)2Cl], is disordered above 178 K. A doubling of the unit-cell volume is observed on cooling. The asymmetric unit at 93 K contains two ordered molecules.

Use of melem as a nucleophilic reagent to form the triphthalimide C6N7(phthal)3--new targets and prospects.

Melem (1), as one of the most important representatives of the tri-s-triazine compounds, can be used as a nucleophilic reagent in reactions with phthalic acid derivatives. The synthesis of 2,5,8-triphthalimido-tri-s-triazine (C(6)N(7)(phthal)(3), 2) was investigated starting from phthalic anhydride or phthalic dichloride in various solvents, at different temperatures as well as in the solid state. NMR measurements (solution and solid state), IR spectroscopy and elemental analysis indicated the formation of a cyclic imide.

Three new fluorinated N-phenyl-substituted pentacyclic ethanoanthracenedicarboximides.

Diels-Alder reaction between maleimides featuring 3,5-di-, 2,4,6-tri- and pentafluorinated N-phenyl substituents and anthracene yields the corresponding pentacyclic ethanoanthracenedicarboximide compounds, namely N-(3,5-difluorophenyl)-9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboximide, C(24)H(15)F(2)NO(2), (IIa), N-(2,4,6-trifluorophenyl)-9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboximide, C(24)H(14)F(3)NO(2), (IIb), N-(2,3,4,5,6-pentafluorophenyl)-9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboximide, C(24)H(12)F(5)NO(2), (IIc). The crystal structures of (IIa)-(IIc) reveal an expected molecular geometry with a `V'-shape of the anthracene-derived tricyclic moiety. The crystal packings of (IIa) and (IIb) are dominated by π-π and C-H···O/F interactions, while F···F and C-H···π contacts are absent.

1-Bromo-2,3,5,6-tetra-fluoro-4-nitro-benzene.

In the title compound, C(6)BrF(4)NO(2), the nitro group is twisted by 41.7 (3)° with reference to the arene ring mean plane. The main inter-actions stabilizing the crystal structure include O⋯Br contacts [3.

5,7-Dibromo-2-methyl-quinolin-8-ol.

In the title compound, C(10)H(7)Br(2)NO, the mol-ecule possesses a planar geometry with an r.m.s deviation of 0.

C(6)N(7)Cl[N(C(6)H(5))(2)](2).p-C(6)H(4)(CH(3))(2)-a mono-chloro-tri-s-triazine adduct.

We report the synthesis and comprehensive characterization including the first crystal structure of a disubstituted tri-s-triazine. The molecule bears one chlorine atom as a reactive site for further derivatisation.

(E)-1,3-Bis(2,3,4,5,6-penta-fluoro-phen-yl)prop-2-en-1-one.

In the title compound, C(15)H(2)F(10)O, the two perfluorinated arene rings are tilted at an angle of 66.08 (5)° with respect to each other. The olefinic double bond adopts an E configuration and the single bond between the olefinic and carbonyl double bonds has an s-trans conformation.

1,5-Bis(penta-fluoro-phen-yl)-3-phenyl-pent-2-ene-1,5-dione.

In the title compound, C(23)H(8)F(10)O(2), the three arene rings are twisted one with respect to the other: the two perfluorinated arene rings are tilted to each other by an angle of 60.39 (7)°. They are inclined to the non-fluorinated phenyl unit by 38.

Formation of a silicon-containing macrocycle with a pyridoxalimine Schiff base ligand.

The reaction of dichlorodiphenylsilane with a polydentate Schiff base ligand derived from pyridoxal and 2-hydroxyaniline yields the macrocyclic centrosymmetric silicon compound 9,27-dimethyl-3,3,21,21-tetraphenyl-2,4,20,22-tetraoxa-8,13,26,31-tetraaza-3,21-disilapentacyclo[30.4.0.