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2,2'-Dichloro-N,N'-[1,3-phenyl-enebis(methyl-ene)]diacetamide.

ABSTRACT: The complete mol-ecule of the title compound, C(12)H(14)Cl(2)N(2)O(2), is generated by a crystallographic twofold axis with two C atoms of the central benzene ring lying on the axis. In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into chains parallel to the c axis.

SUBMITTER: Cai HX

PROVIDER: S-EPMC3343915 | biostudies-literature |

REPOSITORIES: biostudies-literature

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1,1'-{2,2'-[1,4-Phenyl-enebis(methyl-ene)]bis-(-oxy)bis-(2,1-phenyl-ene)}diethanone.

Project description:The asymmetric unit of the title compound, C(24)H(22)O(4), contains one half-mol-ecule, the other half being generated by a crystallographic center of inversion. The central benzene ring makes a dihedral angle of 72.49?(5)° with the terminal benzene ring. In the crystal, adjacent mol-ecules are linked through C-H?O inter-actions, forming a sheet structure parallel to the bc plane. The sheets are stacked along the a axis via ?-? inter-actions formed between the terminal benzene rings [centroid-centroid separation = 3.7276?(6)?Å].

| S-EPMC3247415 | biostudies-literature

N,N'-Diallyl-2,2',5,5'-tetra-chloro-N,N'-[1,3-phenyl-enebis(methyl-ene)]dibenzene-sulfonamide.

Project description:In the title compound, C(26)H(24)Cl(4)N(2)O(4)S(2), the dihedral angles between the central benzene ring and the pendant rings are 70.07 (12) and 59.07 (12)°. The equivalent angle between the pendant rings is 79.24 (12)°. Both sulfonamide groups lie to the same side of the central ring but the pendant chains have very different conformations, as indicated by their C-S-N-C torsion angles [104.66 (17) and -76.35 (19)°] and S-N-C-C torsion angles [129.61 (17) and 147.10 (17)°]. Both N atoms are close to planar (bond angle sums = 359.0 and 354.8°). In the crystal, inversion dimers are formed via a pair of weak C-H⋯O inter-actions which generate R(2) (2)(22) loops.

| S-EPMC3238937 | biostudies-literature

N,N'-[1,3-Phenyl-enebis(methyl-ene)]di-p-toluenesulfonamide.

Project description:In the title compound, C(22)H(24)N(2)O(4)S(2), the dihedral angles between the central benzene ring and the pendant rings are 66.96 (13) and 69.37 (13)°. The torsion angles for the C-N-S-C fragments are -68.5 (3) and -72.6 (3)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds to generate infinite (001) sheets containing R(4) (4)(28) loops. A weak aromatic π-π stacking contact between one of the terminal benzene rings and its inversion-related partner is also observed [centroid-to-centroid separation = 3.796 (2) Å and slippage = 1.581 Å], as are two possible C-H⋯π contacts.

| S-EPMC3343931 | biostudies-literature

3,3'-Di-tert-butyl-1,1'-[1,3-phenyl-enebis(methyl-ene)]diurea.

Project description:The title compound, C(18)H(30)N(4)O(2), contains two tert-butyl urea groups, each connected to a benzene ring though a methyl-ene group. One of the groups occupies a position almost normal to the aromatic plane with a C-N-C-C torsion angle of -94.4?(4)°, while the other is considerably twisted from the ring with a C-N-C-C torsion angle of -136.1?(4)°. In the crystal, pairs of mol-ecules are connected to each other, forming centrosymmetric dimers in which two NH groups of one mol-ecule act as hydrogen-bond donors to one carbonyl O atom of the other mol-ecule. The dimers are linked into sheets parallel to (100) by N-H?O hydrogen bonds involving the remaining N-H and C=O groups.

| S-EPMC2983681 | biostudies-literature

1,4-Phenyl-enebis(methyl-ene) dicarbamate.

Project description:The title compound, C(10)H(12)N(2)O(4), is a phenyl dicarbamate with crystallographically imposed inversion symmetry. The dihedral angle between the carbamo-yloxy plane [i.e. the plane of the N-C(O)-O fragment; r.m.s. deviation = 0.002?(3)?Å] and the plane of the aryl ring is 29.2?(1)°. In the crystal, two different centrosymmetric N-H?O hydrogen-bond inter-actions are observed; these are described as R(2) (2)(8) and R(2) (4)(8) in graph-set notation. The rings form an alternating sequence, linking the mol-ecules into a sheet structure parallel to (011).

| S-EPMC3344159 | biostudies-literature

2,2'-[Ethyl-enebis(azanediyl-methyl-ene)]diphenol.

Project description:In the title compound, C(16)H(20)N(2)O(4), the mol-ecule features a zigzag -CH(2)-NH-CH(2)-CH(2)-NH-CH(2)- chain whose ends are connected to the hydroxy-phenyl rings. The mol-ecules lies about a center of inversion. The imino group is a hydrogen-bond donor for the hydr-oxy group, which is a hydrogen-bond donor for the imino group of an adjacent mol-ecule. This latter inter-molecular hydrogen bonding leads to a layer structure.

| S-EPMC2971760 | biostudies-literature

2,2'-[(4-Methyl-2-phenyl-imidazolidine-1,3-di-yl)bis-(methyl-ene)]diphenol.

Project description:The methyl-substituted imidazolidine ring of the title compound, C24H26N2O2, adopts an envelope conformation with the N atom adjacent to the methyl-ene group as the flap. The meth-yl-ethyl-ene fragment in this ring is disordered over two positions with an occupancy ratio of 0.899?(4):0.101?(4). The hy-droxy-benzyl groups are inclined at 71.57?(15) and 69.97?(19)° to the mean plane of major disorder component of the heterocyclic ring with an inter-planar angle between the two hy-droxy-benzyl groups of 66.00?(5)°. The phenyl substit-uent approaches a nearly perpendicular orientation relative to the mean plane of the imidazolidine ring, making a dihedral angle of 75.60?(12)°. This conformation is stabilized by two intra-molecular O-H?N bonds, which generate S(6) ring motifs.

| S-EPMC3793710 | biostudies-literature

5,5'-[(2,4-Dichloro-phen-yl)methyl-ene]bis-(2,2-dimethyl-1,3-dioxane-4,6-dione).

Project description:The title compound, C(19)H(18)Cl(2)O(8), was prepared by the reaction of 2,2-dimethyl-1,3-dioxane-4,6-dione and 2,4-dichloro-benzaldehyde in ethanol. The two 1,3-dioxane rings exhibit boat conformations. In the crystal, mol-ecules are linked by weak inter-molecular C-H?O and C-H?Cl hydrogen bonds, forming chains parallel to the a axis.

| S-EPMC3212288 | biostudies-literature

{6,6'-Dimeth-oxy-2,2'-[o-phenyl-enebis(nitrilo-methyl-idyne)]diphenolato}cobalt(II) dichloro-methane disolvate.

Project description:The title compound, [Co(C(22)H(18)N(2)O(4))]·2CH(2)Cl(2), was isolated from the reaction of N,N'(o-phenyl-ene)bis-(vanillalimine) (H(2)L) with Co(SCN)(2). The crystal structure contains a Co(II) ion surrounded by the L(2-) ligand in a slightly distorted square-planar fashion. Inter-molecular C-H?O hydrogen-bonding contacts between the dichloro-methane solvent mol-ecules and the meth-oxy or carboxyl-ate O atoms are observed in the crystal structure. The planar complex mol-ecules stack through inversion related ?-? inter-actions between the six-membered rings of the vanillalimine half ligands. The distance between centroids is 3.498?(2)?Å and the perpendicular distance is 3.345?Å. A partial stacking is observed with a centroid-centroid distance of 3.830?(2)?Å, a perpendicular distance of 3.350?Å and a slippage of 1.856?Å.

| S-EPMC2968184 | biostudies-literature

2,2'-[4-Acetyl-1,3-phenyl-enebis(-oxy)]diacetic acid.

Project description:In the title compound, C12H12O7, the dihedral angles between the benzene ring and the mean planes of the 3-carb-oxy-meth-oxy, 1-carb-oxy-meth-oxy and acetyl substituents are 8.67?(7), 7.81?(6) and 10.3?(18)°, respectively. In the crystal, mol-ecules are linked by typical carb-oxy-lic acid O-H?O hydrogen bonds, forming a zigzag chain. C-H?O inter-actions also occur.

| S-EPMC3589043 | biostudies-literature

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