Heng-Yun Ye

(Z)-3-Ferrocenyl-2-phenyl-acrylonitrile.

In the structure of the title compound, [Fe(C5H5)(C14H10N)], the unsubstituted cyclopentadiene (Cp) ring is disordered over two positions, with site-occupancy factors 0.76u2005(2) and 0.24u2005(2). The dihedral angles between the substituted Cp ring and the major and the minor components of the disordered ring are 0.9u2005(5) and 6(2)°, repectively. The plane of the acrylonitrile unit makes dihedral angles of 6.1u2005(18) and 6.5u2005(4)° with the substituted Cp ring and the phenyl ring planes, respectively.

5-(4′-Methylbiphenyl-2-yl)-2-triphenylmethyl-2H-tetrazole

The title compound, C33H26N4, was synthesized in two steps from 2-phenylxadbenzonitrile. Geometric parameters are in the usual ranges. The tetraxadzole ring encloses dihedral angles of 45.76u2005(9), 71.44u2005(8) and 72.38u2005(6)° with the three phenyl rings of the triphenylxadmethyl group. The dihedral angle between the tetrazole ring and the benzene ring directly attached to it is 49.13u2005(8)° and the dihedral angle between the aromatic rings of the biphenyl group is 54.29u2005(8)°.

Julolidine-1,6-dione

The title molxadecule, C12H11NO2, has crystallographic mirror symmetry. Weak interxadmolecular C—H⋯O hydrogen bonds help stabilize the crystal structure.

(E,E)-2,2'-[1,1'-(Cyclohexane-1,2-diyl-dinitrilo)diethylidyne]diphenol.

The title compound, C22H26N2O2, is chiral; the absolute configuration follows from the known chirality of the input reagents. The asymmetric unit contains two crystallographically independent molecules in different orientations. The two molecules are related to each other by a non-crystallographic twofold rotation axis, while each molecule exhibits a further pseudo-twofold axis. Bond distances and angles are similar in the two molecules. Intermolecular C—H⋯π(ring) interactions and intramolecular O—H⋯N hydrogen bonds are observed in the crystal structure.

rac-(4aR,8aR)-2,3-Diphenyl-4a,5,6,7,8,8a-hexa­hydro­quinoxaline

The structure of the title racemic compound, C20H20N2, shows close similarity to that of the enantiomerically pure (4aR,8aR)-2,3-diphenyl-4a,5,6,7,8,8a-hexahydroquinoxaline [Wang & Ye (2008 ▶). Acta Cryst. E64, o359–o359]. The similarity applies to the unit-cell parameters as well as to the packing of the constituent molecules. Similar packing is conditioned by a lack of directed intermolecular interactions such as hydrogen bonds in either structure.

catena-Poly[[chloridocobalt(II)]-μ-5-(8-quinolyloxymeth­yl)tetra­zolato-κ4N5,O,N1:N4]

In the title compound, [Co(C11H8N5O)Cl]n, the CoII atom is pentacoordinated by one O atom and two N atoms from a 5-(8-quinolyloxymethyl)tetrazolate ligand, one N atom from another symmetry-related ligand, and a Cl atom. The coordination geometry can be described as slightly distorted trigonal–bipyramidal. Adjacent Co atoms are connected by the bridging tetrazole groups into a chain. The dihedral angle between the quinoline and tetrazole planes is 21.2u2005(1)°. The structure involves intra- and interchain C—H⋯N hydrogen bonds.

1-Benzyl-2,3-dihydro­quinolin-4(1H)-one

In the title compound, C16H15NO, the two aromatic rings are approximately perpendicular; the carbonyl group is twisted out of the adjacent benzene ring by 14.8u2005(2)°. In the heterocyclic ring, the C atom linked to the carbonyl group and the C atom linked to the N atom have opposite deviations of 0.467u2005(5) and 0.184u2005(4)u2005Å, respectively, from the plane of the benzene ring. The N atom lies approximately in the plane of the phenyl ring. There are no conventional hydrogen bonds; the packing of molecules in the crystal structure is stabilized by van der Waals forces.

1,3,5-Tris(2H-tetra­zol-5-ylmeth­oxy)­benzene

The title compound, C12H12N12O3, was obtained by the hydrothermal reaction of 1,3,5-tricyanomethoxybenzene and (CH3)3SiN3. The molecule is almost planar, with an r.m.s. deviation of 0.0976u2005Å from the plane through all atoms in the molecule. The three tetrazole rings make dihedral angles of 13.09u2005(19), 2.01u2005(19) and 11.56u2005(18)° with one another and corresponding angles of 8.66u2005(17), 5.44u2005(16) and 3.51u2005(17)° with the central benzene ring. In the crystal structure, intermolecular N—H⋯N hydrogen bonds form well separated one-dimensional planar sheets.

(Z)-3-Ferrocenyl-2-(3-pyrid­yl)­acrylo­nitrile

The molecular structure of the title compound, [Fe(C5H5)(C13H9N2)], (I), is analogous to that of the compound (Z)-3-ferrocenyl-2-phenylacrylonitrile [Cao & Ye (2008). Acta Cryst. E64, m822], (II), with the pyridine ring in (I) replacing the benzene ring in (II). While the corresponding bond distances and angles in the two compounds show no significant differences, the two dihedral angles between the planes through the acrylonitrile group and the two rings attached to it (substituted Cp and pyridine) of 16.8u2005(4) and 20.1u2005(4)° in (I) are different from the corresponding dihedral angles [19.6u2005(3) and 6.5u2005(4)°] in (II). The unsubstituted ring is disordered over two positions, with site-occupancy factors of 0.70u2005(1) and 0.30u2005(1). The major and minor components of the disordered ring are almost coplanar and are also parallel to the substituted cyclopentadiene ring plane, with a dihedral angle of 0.3u2005(6)°.

(2S,4aR,3S,8aR,9R,10R)-1,4-Diallyl-2,3-diphenyl­perhydro­quinoxaline

In the title compound, C26H32N2, the cyclohexane and piperazine rings each adopt a chair conformation. Both phenyl rings and the two propen-3-yl residues are in equatorial positions. There are no C—H⋯N hydrogen bonds nor π–π interactions between the aromatic rings. The absolute configuration was assigned with reference to the starting material.