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(E)-2-(3-Chloro-benzyl-idene)-5,6-dimeth-oxy-2,3-dihydro-1H-inden-1-one.

ABSTRACT: In the title compound, C(18)H(15)ClO(3), the dihydro-indenone group makes a dihedral angle of 8.56 (6)° with the bezene ring. In the crystal, the mol-ecules are inter-connected into a three-dimensional network via inter-molecular C-H⋯O hydrogen bonds. Weak C-H⋯π and π⋯π [centroid-centroid distances 3.6598 (9)-3.6913 (9) Å] inter-actions are also observed.

SUBMITTER: Ali MA

PROVIDER: S-EPMC3008978 | biostudies-literature |

REPOSITORIES: biostudies-literature

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(E)-2-(3,4-Dimeth-oxy-benzyl-idene)-5,6-dimeth-oxy-2,3-dihydro-1H-inden-1-one.

Project description:In the title compound, C(20)H(20)O(5), the 2,3-dihydro-1H-indene ring system is essentially planar [maximum deviation = 0.010 (1) Å] and is inclined at an angle of 4.09 (4)° with respect to the phenyl ring. The C=C bond has an E configuration. In the crystal, the mol-ecules are linked into chains propagating in [102] via inter-molecular C-H⋯O hydrogen bonds. The crystal structure is further consolidated by C-H⋯π inter-actions.

| S-EPMC3009320 | biostudies-literature

(E)-5,6-Dimeth-oxy-2-(pyridin-4-yl-methyl-idene)-2,3-dihydro-1H-inden-1-one.

Project description:The mol-ecule of the title compound, C(17)H(15)NO(3), is slightly twisted, with a dihedral angle of 12.12?(3)° between the dihydro-indenone group and the pyridine ring. In the crystal, mol-ecules are connected into layers parallel to the ab plane via inter-molecular C-H?O hydrogen bonds. Weak ?-? [centroid-centroid distance = 3.5680?(6)?Å] inter-actions are also observed.

| S-EPMC3009365 | biostudies-literature

(Z)-3-Chloro-methyl-idene-5,6-dimeth-oxy-2-methyl-2,3-dihydro-1,2-benzothia-zole 1,1-dioxide.

Project description:The title compound, C(11)H(12)ClNO(4)S, adopts a Z configuration about the C=C double bond. The benzisothia-zole system is essentially planar [maximum deviation of 0.235?(2)?Å for the S atom]. In the crystal, the mol-ecules stack parallel to each other in the b-axis direction, with inter-planar spacings for the benzene and thia-zole rings ranging from 3.402?(2) to 3.702?(2)?Å.

| S-EPMC3050289 | biostudies-literature

(E)-2-[4-(Trifluoro-meth-yl)benzyl-idene]-2,3-dihydro-1H-inden-1-one.

Project description:In the title mol-ecule, C(17)H(11)F(3)O, the indan ring system and the trifluoro-methyl-substituted benzene ring are approximately individually planar and form a dihedral angle of 1.81?(5)° with each other. In the crystal, mol-ecules are linked by pairs of weak bifurcated (C-H)(2)?O hydrogen bonds to form centrosymmetric dimers, generating R(2) (1)(6) and R(2) (2)(10) ring motifs. These dimers are connected by further weak C-H?O hydrogen bonds into one-dimensional chains along the b axis. Weak C-H?? inter-actions are also present.

| S-EPMC3275283 | biostudies-literature

(E)-2-[4-(Piperidin-1-yl)benzyl-idene]-2,3-dihydro-1H-inden-1-one.

Project description:In the title compound, C(21)H(21)NO, the indene ring system is essentially planar with a maximum deviation of 0.066?(1)?Å and makes dihedral angles of 7.93?(6) and 2.43?(6)°, respectively, with the benzene plane and the mean plane of the piperidine ring. These latter two planes make a dihedral angle of 7.61?(7)°. In the crystal, mol-ecules are linked by C-H?O inter-actions, forming infinite chains along the b axis.

| S-EPMC3009073 | biostudies-literature

(Z)-3-(3,4-Dimeth-oxy-benzyl-idene)-2,3-dihydro-1,5-benzothia-zepin-4(5H)-one.

Project description:In the title compound, C18H17NO3S, the seven-membered thia-zepine ring adopts a slightly distorted sofa conformation. The dihedral angle between the mean plane of the benzothia-zepine ring system and the benzene ring is 5.9 (1)°. The mol-ecular conformation is stabilized by an intra-molecular C-H⋯S hydrogen bond, which generates an S(7) ring motif. In the crystal, N-H⋯O and C-H⋯O hydrogen bonds link inversion-related mol-ecules into dimers, incorporating R 1 (2)(6) and R 2 (2)(8) ring motifs; the acceptor O atom is bifurcated. These dimers are further linked by C-H⋯O hydrogen bonds, forming supra-molecular tapes running along the a axis. These are connected into the three-dimensional architecture by C-H⋯π inter-actions.

| S-EPMC3629613 | biostudies-literature

N-(2,3-Dimeth-oxy-benzyl-idene)naphthalen-1-amine.

Project description:The title compound, C(19)H(17)NO(2), represents a trans isomer with respect to the C=N bond. The dihedral angle between the planes of the naphthyl ring system and the benzene ring is 71.70 (3)°. In the crystal, weak C-H⋯O hydrogen bonding is present.

| S-EPMC3051734 | biostudies-literature

Ortho-rhom-bic polymorph of (2E)-2-(2,3-dihydro-1H-inden-1-yl-idene)-2,3-di-hydro-1H-inden-1-one.

Project description:The title compound, C(18)H(14)O, is polymorphic at 123 K. The ortho-rhom-bic form reported herein has two independent mol-ecules in the asymmetric unit, with mol-ecular volume 313.5 Å(3). The previously reported triclinic (P-1) form [Raston & Scott (2000 ▶). Green Chem., 2, 49-52] has mol-ecular volume 309.6 Å(3) at the same temperature. All three mol-ecules deviate significantly and systematically from the putative C(s) symmetry (δ(r.m.s.) = 0.0265, 0.0256, 0.0497 Å). Comparison of the two molecules in the orthorhombic polymorph shows that 16 of the 19 equivalent pairs of framework atoms have a mirror-image pattern of deviations (above/below plane), suggesting that the two are quasi-enanti-omorphs. The pattern of deviations in the triclinic form is nearly the same (13 of 19 atom pairs) as the ortho-rhom-bic form.

| S-EPMC3435792 | biostudies-literature

(1E,2E)-1,2-Bis(2,3-dihydro-1H-inden-1-yl-idene)hydrazine.

Project description:In the title compound, C(18)H(16)N(2), there are two independent half-mol-ecules (A and B) in the asymmetric unit, each mol-ecule being completed by an inversion center situated in the mid-point of the central N-N bond. The mol-ecules themselves therefore are essentially planar with r.m.s. deviations of 0.015 (1) and 0.020 (1) Å, respectively. In the crystal, mol-ecules are connected via C-H⋯π inter-actions in which only type B mol-ecules are donors, while both A and B mol-ecules act as acceptors. As a result, type B mol-ecules are linked into infinite chains along b, which are inter-connected by molecules of type A.

| S-EPMC3435753 | biostudies-literature

1,3-Dimeth-oxy-2,3-dihydro-1H-isoindole-2-carbothio-amide.

Project description:In the mol-ecule of the title compound, C(11)H(14)N(2)O(2)S, the five-membered ring adopts an envelope conformation and an intramolecular N-H⋯O hydrogen bond occurs. Intra-molecular N-H⋯O, C-H⋯S and C-H⋯N hydrogen bonds result in the formation of two five- and one six-membered rings, having twisted conformations. In the crystal structure, inter-molecular N-H⋯O, N-H⋯S and C-H⋯S hydrogen bonds link the mol-ecules, forming polymeric sheets. The π-π contacts between the isoindole ring systems, [centroid-centroid distances = 3.5883 (8) and 4.0619 (8) Å] may further stabilize the structure. A C-H⋯π inter-actions also occur.

| S-EPMC2967958 | biostudies-literature

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