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R-1,t-3-Bis[4-(di-methyl-amino)-phen-yl]-c-2,t-4-bis-(pyridin-4-yl)cyclo-butane.

ABSTRACT: The title compound, C30H32N4, was synthesized by the photodimerization of trans-4-{2-[4-(di-methyl-amino)-phen-yl]ethen-yl}pyridine in benzene upon irradiation with UV light. This photodimer has a puckered cyclo-butane ring with the four aryl substituents in an r-1,t-2,c-3,t conformation. The puckering angle of the cyclo-butane ring is 32.22?(7)°, which is the largest among reported tetra-aryl-substituted cyclo-butanes. In the crystal, the mol-ecules form a hollow, one-dimensional structure extending parallel to the c axis via two different pairs of C-H?? inter-actions.

SUBMITTER: Zhang S

PROVIDER: S-EPMC3998431 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature

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r-1,t-3-Bis[4-(di-methyl-amino)-phen-yl]-c-2,t-4-bis-(pyridin-4-yl)cyclo-butane.

Zhang Shuguang S Zhuang Junpeng J

Acta crystallographica. Section E, Structure reports online 20140215 Pt 3

The title compound, C30H32N4, was synthesized by the photodimerization of trans-4-{2-[4-(di-methyl-amino)-phen-yl]ethen-yl}pyridine in benzene upon irradiation with UV light. This photodimer has a puckered cyclo-butane ring with the four aryl substituents in an r-1,t-2,c-3,t conformation. The puckering angle of the cyclo-butane ring is 32.22 (7)°, which is the largest among reported tetra-aryl-substituted cyclo-butanes. In the crystal, the mol-ecules form a hollow, one-dimensional structure exte ...[more]

PMID: 24765012

Similar Datasets

Crystal structures of (E)-5-(4-methyl-phen-yl)-1-(pyridin-2-yl)pent-2-en-4-yn-1-one and [3,4-bis(phenyl-ethyn-yl)cyclo-butane-1,2-di-yl]bis-(pyridin-2-yl-methanone).

Project description:Recrystallization of (E)-5-phenyl-1-(pyridin-2-yl)pent-2-en-4-yn-1-one at room temperature from ethyl-ene glycol in daylight afforded [3,4-bis-(phenyl-ethyn-yl)cyclo-butane-1,2-di-yl)bis-(pyridin-2-yl-methanone], C32H22N2O2 (3), while (E)-5-(4-methyl-phen-yl)-1-(pyridin-2-yl)pent-2-en-4-yn-1-one, C17H13NO (2), remained photoinert. This is the first experimental evidence that pentenynones can be photoreactive when fixed in nearly coplanar parallel positions. During the photoreaction, the bond lengths and angles along the pentenyne chain changed significantly, while the disposition of the pyridyl ring towards the keto group was almost unchanged. The cyclo-butane ring adopts an rctt conformation.

| S-EPMC7001831 | biostudies-literature

1,1'-(Butane-1,4-di-yl)bis-[2-(pyridin-2-yl)-1H-benzimidazole].

Project description:The complete mol-ecule of the title compound, C(28)H(24)N(6), is generated by inversion symmetry with the inversion centre located at the mid-point of the central C-C bond of the butanediyl unit. The benzimidazole and pyridine rings are almost coplanar, the dihedral angle between their mean planes being 6.86?(11)°.

| S-EPMC3344554 | biostudies-literature

Bis[1-(2,3-di-methyl-phen-yl)piperazine-1,4-diium] bis-(oxonium) cyclo-hexa-phosphate dihydrate.

Project description:In the title compound, 2C12H20N2 (2+)·2H3O(+)·P6O18 (6-)·2H2O, a protonated water mol-ecule bridges the centrosymmetrical anionic P6O18 ring via O-H?O hydrogen bonds. The centrosymmetric hydrogen-bonded rings formed by four oxonium cations and four phosphate anions can be described by an R 4 (8)(36) graph-set motif. The ring motifs are connected by hydrogen bonds into inorganic layers perpendicular to [100]. The 1-(2,3-di-methyl-phen-yl)piperazine-1,4-diium cations are located between the layers, compensating their negative charge and establishing N-H?O hydrogen bonds with the O atoms of the anionic framework.

| S-EPMC3770409 | biostudies-literature

2,2'-[2,4-Bis(naphthalen-1-yl)cyclo-butane-1,3-di-yl]bis-(1-methyl-pyridinium) diiodide: thermal-induced [2?+?2] cyclo-addition reaction of a heterostilbene.

Project description:The asymmetric unit of the title compound, C(36)H(32)N(2) (2+)·2I(-), consists of one half-mol-ecule of the cation and one I(-) anion. The cation is located on an inversion centre. The dihedral angle between the pyridinium ring and the naphthalene ring system in the asymmetric unit is 19.01?(14)°. In the crystal, the cations and the anions are linked by C-H?I inter-actions into a layer parallel to the bc plane. Intra- and inter-molecular ?-? inter-actions with centroid-centroid distances of 3.533?(2)-3.807?(2)?Å are also observed.

| S-EPMC3254423 | biostudies-literature

(4-{[(Pyridin-4-yl)methyl-idene]amino}-phen-yl)ferrocene.

Project description:The asymetric unit of the title compound, [Fe(C5H5)(C17H13N2)], contains two independent mol-ecules whose conformations differ, especially in the 4-{(pyridin-4-yl)methyl-idene]amino}-phenyl unit where one is flipped by almost 180°. The cyclo-penta-dienyl rings of the ferrocene unit also exhibit different staggered conformations: in one mol-ecule the conformation is staggered by 9.43?(2)° and in the other by 24.46?(1)° from an ideal eclipsed geometry. The plane of the benzene ring is tilted away from the ferrocene group in both mol-ecules, with dihedral angles of 6.97?(1) and 10.30?(2)°. The benzene ring is also slightly twisted from the plane of the pyridine ring, with dihedral angles of 5.98?(2) and 6.51?(2)° in the two mol-ecules.

| S-EPMC3588778 | biostudies-literature

{2-[(Dimethyl-amino)-meth-yl]phen-yl}bis-(4-methyl-phen-yl)bis-muthane.

Project description:The title compound, [Bi(C(7)H(7))(2)(C(9)H(12)N)], was obtained by treating chlorodi(p-tol-yl)bis-muthane with o-lithio-N,N-dimethyl-benzyl-amine. An intra-molecular Bi?N nonbonding inter-action is observed in the distorted trigonal triaryl-bis-muth coordination of the title compound.

| S-EPMC3050329 | biostudies-literature

2,2'-[2,4-Bis(naphthalen-1-yl)cyclo-butane-1,3-di-yl]bis-(1-methyl-pyridinium) bis-(4-chloro-benzene-sulfonate): thermal-induced [2 + 2] cyclo-addition reaction of a heterostilbene.

Project description:The asymmetric unit of the title salt, C36H32N2 (2+)·2C6H4ClO3S(-), consists of one anion and one half-cation, the other half being generated by inversion symmetry. The dihedral angle between the pyridinium ring and the napthalene ring system in the asymmetric unit is 42.86?(6)°. In the crystal, cations and anions are linked by weak C-H?O inter-actions into chains along [010]. Adjacent chains are further arranged in an anti-parallel manner into sheets parallel to the bc plane. ?-? inter-actions are observed involving the cations, with centroid-centroid distances of 3.7664?(8) and 3.8553?(8)?Å.

| S-EPMC4011255 | biostudies-literature

Bis(?-4,4;6,6-bis-(biphenyl-2,2'-diyldi-oxy)-2,2-bis-{2-[5-(pyridin-4-yl)-1,3,4-oxadiazol-2-yl]phen-oxy}cyclo-triphosphazene)di-?-chlorido-bis-[chlorido-copper(II)].

Project description:In the crystal of the title compound, [Cu(2)Cl(4)(C(50)H(32)N(9)O(8)P(3))(2)], the binuclear mol-ecule is located across an inversion center. Each Cu(2+) cation is coordinated by two pyridine N atoms from symmetry-related 4,4;6,6-bis-(biphenyl-2,2'-diyldi-oxy)-2,2-bis-{2-[5-(pyridin-4-yl)-1,3,4-oxadiazol-2-yl]phen-oxy}cyclo-triphosphazene (L) ligands, a pair of bridging Cl(-) anions and a terminal Cl(-) anion, forming a distorted CuCl(3)N(2) square-pyramidal geometry. Weak intra-molecular C-H?O and inter-molecular C-H?N inter-actions occur in the crystal.

| S-EPMC3344371 | biostudies-literature

2-[2,6-Bis(propan-2-yl)phen-yl]-1,3-di-cyclo-hexyl-guanidine.

Project description:In the title asymmetric di-cyclo-hexyl-phenyl-guanidine, C25H41N3, the central guanidine C atom deviates by only 0.004?(2)?Å from the central plane defined by the three N atoms. The benzene and the cyclo-hexyl rings are rotated out of the central plane of the N3C unit by 85.63?(12)° (benzene) and 51.52?(9) and 49.37?(12)° (cyclohexyl). The crystal packing features only by van der Waals inter-actions.

| S-EPMC4120537 | biostudies-literature

Di-?-chlorido-bis-(chlorido-{N'-[phen-yl(pyridin-2-yl-?N)methyl-idene]pyridine-2-carbohydrazide-?(2) N',O}cadmium).

Project description:The title compound, [Cd2Cl4(C18H14N4O)2], was obtained from the reaction of Cd(NO3)2·4H2O with 2-phenyl-pyridine-keton picolinoyl hydrazone and sodium chloride. Each Cd(2+) cation is coordinated by two N atoms and one O atom of the tridentate ligand and three chloride anions, forming a distorted CdNOCl3 octahedron. Each pair of adjacent metal cations is linked by two bridging chloride ligands, resulting in a dinuclear complex unit. The mol-ecular conformation is stabilized by intra-molecular N-H?N and C-H?O hydrogen bonds. In the crystal, mol-ecules are linked by nonclassical C-H?O and C-H?Cl hydrogen bonds into a three-dimensional network. In addition, ?-? stacking inter-actions [centroid-centroid distances = 3.777?(2) and 3.631?(2)?Å] contribute to the stabilization of the crystal packing.

| S-EPMC4051065 | biostudies-literature

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