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N-(9H-Fluoren-9-yl-idene)-4-methyl-aniline.

ABSTRACT: In the title compound, C(20)H(15)N, the fluorene unit is essentially planar [r.m.s. deviation 0.0334?Å] and the benzene ring bound to the imine N atom bears a methyl group which is nearly coplanar [dihedral angle 0.5?(1)°]. The dihedral angle between the substituent benzene ring and the 9H-fluoren-9-imine unit is 71.1?(3)°. Inter-molecular ?-? inter-actions between the benzene rings of adjacent fluorene units [centroid-centroid distance 3.8081?(13)?Å] are present in the crystal structure, resulting in a one-dimensional supra-molecular architecture.

PROVIDER: S-EPMC2969441 | BioStudies |

REPOSITORIES: biostudies

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(Z)-tert-Butyl 2-(4-amino-9H-fluoren-9-yl-idene)acetate.

Project description:The title compound, C(19)H(19)NO(2), obtained as an almost equimolar mixture (as shown by (1)H NMR) with the E isomer through a Wittig reaction between 4-amino-9H-fluoren-9-one and the stabilized ylide Ph(3)P=CHCO(2)C(CH(3))(3), was obtained pure in the Z configuration following crystallization from toluene. The mol-ecule shows a planar arrangement of the ring system and the new double bond, whereas the carbonyl O atom forms a 45.1?(3)° dihedral angle with it. The mol-ecules are linked by N-H?O hydrogen bonds, forming cyclic structures with R(4) (4)(24) graph-set motifs. These motifs are connected to each other, giving rise to a sheet structure parallel to the ab plane. The linkage within the sheets is further enhanced by ?-? stacking inter-actions between the fluorene units [centroid-centroid distance = 3.583?(2)?Å].

| S-EPMC2959429 | BioStudies

9-Chloro-methyl-9-[(9H-fluoren-9-yl)meth-yl]-9H-fluorene.

Project description:In the title compound, C(28)H(21)Cl, the dihedral angle between the two fluorene ring systems is 71.97?(4)°. There is an intra-molecular C-H?Cl hydrogen bond. In the crystal structure, the centroid-to-centroid distance between stacked fluorene ring systems is ca 4.22?Å, which indicates that there are no ?-? stacking inter-actions between them.

| S-EPMC2961556 | BioStudies

N-(4,5-Diaza-9H-fluoren-9-yl-idene)-4-meth-oxy-aniline.

Project description:In the title compound, C(18)H(13)N(3)O, the diaza-fluorene ring system is almost coplanar (r.m.s. deviation = 0.0640?Å) and subtends an angle of 61.5?(4)° with the plane of the meth-oxy-substituted benzene ring. In the crystal structure, pairs of C-H?O hydrogen bonds link mol-ecules into centrosymmetric dimers parallel to the ab plane. Mol-ecules are also stacked in an obverse fashion along the c axis by a variety of ?-? inter-actions with centroid-centroid distances in the range 3.557?(2)-3.921?(2)?Å.

2010-01-01 | S-EPMC3006891 | BioStudies

Crystal structure of (E)-N-[(E)-3-(4-meth-oxy-phen-yl)allyl-idene]naphthalen-1-amine.

Project description:In the title compound, C20H17NO, the dihedral angle between the mean planes of the 4-meth-oxy-phenyl ring and the naphthalene ring is 69.50?(7)°. The meth-oxy group is almost coplanar with the benzene ring to which it is connected [Cb-Cb-Om-Cm torsion angle of -7.9?(2)°; b = benzene and m = meth-oxy] and the imine group displays a C-C-N=C torsion angle is -57.2?(2)°. The imine (C=N) group has an E conformation. In the crystal, weak ?-? inter-actions between the benzene rings [centroid-centroid distance = 3.7781?(10)?Å] are observed.

| S-EPMC4257298 | BioStudies

3-(Adamantan-1-yl)-4-[(E)-(2,6-di-fluoro-benzyl-idene)amino]-1-[(4-ethyl-piperazin-1-yl)meth-yl]-4,5-di-hydro-1H-1,2,4-triazole-5-thione.

Project description:In the title compound, C26H34F2N6S, the triazole ring is linked to a benzene ring via an imine bond [N=C = 1.255?(2)?Å; conformation: E], with a dihedral angle of 25.21?(11)° between the rings. The 4-ethyl-piperazinyl residue is folded away from the thione-S atom. In the crystal, helical supra-molecular chains propagating along [010] and sustained by weak C-S??(triazole) inter-actions occur [S?centroid distance = 3.2872?(10)?Å]. Links between these chains are of the type benzene-C-H?N(imine) and ?-? [between centrosymmetrically related benzene rings with an inter-centroid distance of 3.9241?(15)?Å] and result in a three-dimensional architecture.

2013-01-01 | S-EPMC3647879 | BioStudies

9-Phenyl-4,5-diaza-9H-fluoren-9-ol monohydrate.

Project description:The title compound, C(17)H(12)N(2)O·H(2)O, was synthesized by the reaction of 4,5-diaza-fluoren-9-one with a Grignard reagent in ether (the reaction mixture being hydrolysed with saturated NH(4)Cl solution), and crystallizes with two organic mol-ecules and two water mol-ecules in the asymmetric unit. The 4,5-diaza-fluorene fragment is approximately planar, with r.m.s. deviations of 0.0448 and 0.0198?Å in the two mol-ecules. The dihedral angles between the 4,5-diaza-fluorene planes and the phenyl ring are 80.49?(6) and 76.57?(7)°. The crystal packing features O-H?N and O-H?O hydrogen bonds involving the bridging solvent water mol-ecules, which link the mol-ecules into a three-dimensional network.

| S-EPMC3379391 | BioStudies

3-(9H-Fluoren-9-yl)-1,3-diphenyl-propan-1-one.

Project description:In the title compound, C(28)H(22)O, the fluorene ring system is approximately planar [maximum deviation = 0.044?(2)?Å] and forms dihedral angles of 69.88?(6) and 89.46?(6)° with the phenyl rings. The crystal packing is stabilized by weak ?-? stacking inter-actions, with centroid-centroid distances of 3.7172?(13) and 3.7827?(11)?Å.

2012-01-01 | S-EPMC3470216 | BioStudies

Fluoren-9-one oxime.

Project description:In the title mol-ecule, C13H9NO, the fluorene system and the oxime group non-H atoms are essentially coplanar, with a maximum deviation from the fluorene mean plane of 0.079?(2)?Å for the oxime O atom. A short intra-molecular C-H?O generates an S(6) ring. In the crystal, mol-ecules related by a twofold screw axis are connected by O-H?N hydrogen bonds, forming [100] chains Within these chains, mol-ecules related by a unit translation along [100] show ?-? stacking inter-actions between their fluorene ring systems with an inter-planar distance of 3.347?(2)?Å. The dihedral angle between the fluorene units of adjacent mol-ecules along the helix is 88.40?(2)°. There is a short C-H?? contact between the fluorene groups belonging to neighbouring chains.

2014-01-01 | S-EPMC3998413 | BioStudies

2-(9,9-Diethyl-9H-fluoren-2-yl)-1-benzofuran.

Project description:In the title compound, C(25)H(22)O, the dihedral angle between the benzofuran and fluorene ring systems is 9.06?(6)°, and that between the two benzene rings of the fluorene system is 1.78?(12)°. Weak inter-molecular C-H?? inter-actions help to stabilize the crystal structure.

| S-EPMC3052132 | BioStudies

(9H-Fluoren-9-yl)(phen-yl)phosphinic acid.

Project description:The crystal structure of the title compound, C19H15O2P, features pairs of mol-ecules joined by O-H?O hydrogen bonds across crystallographic inversion centers. In addition, ?-? inter-actions, with a centroid-centroid distance of 3.6273?(9)?Å between the fluorene ring systems, connect the dimers into chains along [01-1]. The three rings make dihedral angles of 1.34?(9), 1.52?(10) and 1.51?(7)° with each other.

| S-EPMC3588309 | BioStudies

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