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(E)-N'-(4-Nitro-benzyl-idene)-2-(8-quinol-yloxy)acetohydrazide methanol solvate.

ABSTRACT: In the title compound, C(18)H(14)N(4)O(4)·CH(3)OH, the mean planes of the benzene ring and the quinoline ring system make a dihedral angle of 15.5?(2)°. The methanol solvent mol-ecule forms an O-H?N hydrogen bond to the quinoline ring system and accepts an N-H?O hydrogen bond from the hydrazide NH group. The mol-ecules lie in layers approximately parallel to (101) and C-H?O inter-actions exist between mol-ecules within the layers.

SUBMITTER: Ren CY

PROVIDER: S-EPMC2969732 | BioStudies | 2009-01-01T00:00:00Z

REPOSITORIES: biostudies

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(E)-N'-(3,4-Dimethoxy-benzyl-idene)-2-(8-quinol-yloxy)acetohydrazide-methanol-water (1/1/1).

Project description:In the title compound, C(20)H(19)N(3)O(4)·CH(4)O·H(2)O, the Schiff base mol-ecule is almost planar, with a dihedral angle of 1.2?(1)° between the benzene ring and the quinoline ring system. An intra-molecular N-H?O hydrogen bond generates an S(6) ring. In the crystal, the methanol and water solvent mol-ecules are linked to the Schiff base mol-ecule via N-H?O, O-H?O, O-H?N and O-H?(O,N) hydrogen bonds.

2009-01-01 | S-EPMC2972133 | BioStudies

N-(4-Chloro-phen-yl)-2-(8-quinol-yloxy)acetamide monohydrate.

Project description:In the title compound, C(17)H(13)ClN(2)O(2)·H(2)O, the dihedral angle between the quinoline ring system and the benzene ring is 13.0?(1)°. An intra-molecular N-H?O hydrogen bond may influence the mol-ecular conformation. In the crystal structure, acetamide mol-ecules are linked to water mol-ecules via inter-molecular O-H? N and N-H?O hydrogen bonds and in turn linked into chains along [010] via O-H?O hydrogen bonds.

2010-01-01 | S-EPMC3007349 | BioStudies

(E)-N'-(3-Nitro-benzyl-idene)-4-(8-quinol-yloxy)butano-hydrazide.

Project description:In the title Schiff base compound, C(20)H(18)N(4)O(4), the conformation along the bond sequence linking the benzene and quinoline rings is trans-(+)gauche-trans-trans-(+)gauche-trans-trans. The dihedral angle between the aromatic ring systems is 80.3?(6)°. In the crystal, a pair of inter-molecular N-H?N hydrogen bonds link the mol-ecules into centrosymmetric R(2) (2)(20) dimers, which are aggregated via ?-? inter-actions into sheets [quinoline-benzene ring centroid-centroid separation = 3.572?(2)-3.773?(3)?Å].

2010-01-01 | S-EPMC3007025 | BioStudies

(E)-N'-(2,5-Dimethoxy-benzyl-idene)-2-(8-quinol-yloxy)acetohydrazide methanol solvate.

Project description:The two mol-ecules in the asymmetric unit of the title compound, C(20)H(19)N(3)O(4)·CH(4)O, are paired via O-H?(O,N), N-H?O, and C-H?O hydrogen bonds. The mol-ecular skeleton of the acetohydrazide mol-ecule is close to planar; the benzene and quinoline mean planes form a dihedral angle of 3.9?(3)°. The crystal packing exhibits weak inter-molecular C-H?O hydrogen bonds and ?-? inter-actions, indicated by short distances of 3.668?(3)?Å, between the centroids of N-containing six-membered rings from neighbouring acetohydrazide mol-ecules.

1000-01-01 | S-EPMC2977820 | BioStudies

(E)-N'-(4-Nitro-benzyl-idene)-4-(8-quinol-yloxy)butano-hydrazide.

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1000-01-01 | S-EPMC3007085 | BioStudies

(E)-N'-(3,4,5-Trimethoxy-benzyl-idene)-2-(8-quinol-yloxy)acetohydrazide methanol solvate.

Project description:In the title compound, C(21)H(21)N(3)O(5)·CH(4)O, the quinoline plane and the benzene ring form a dihedral angle of 3.6?(2)°. The methanol solvent mol-ecule is linked with the acetohydrazide mol-ecule via O-H?N and N-H?O hydrogen bonds. In the crystal structure, weak inter-molecular C-H?O hydrogen bonds help to consolidate the crystal packing, which also exhibits ?-? inter-actions, as indicated by short distances of 3.739?(4)?Å between the centroids of the aromatic rings.

1000-01-01 | S-EPMC2980132 | BioStudies

(E)-N'-(5-Chloro-2-hydroxy-benzyl-idene)-4-(8-quinol-yloxy)butanohydrazide monohydrate.

Project description:The crystal of the title Schiff base compound, C(20)H(18)ClN(3)O(3)·H(2)O, was twinned by a twofold rotation about (100). The asymmetric unit contains two crystallographically independent mol-ecules with similar conformations, and two water mol-ecules. The C=N-N angles of 115.7?(6) and 116.2?(6)° are significantly smaller than the ideal value of 120° expected for sp(2)-hybridized N atoms and the dihedral angles between the benzene ring and quinoline ring system in the two mol-ecules are 52.5?(7) and 53.9?(7)°. The mol-ecules aggregate via C-Cl?? and ?-? inter-actions [centroid-centroid distances = 3.696?(5)-3.892?(5)?Å] and weak C-H?O inter-actions as parallel sheets, which are further linked by water mol-ecules through N-H?O and O-H?O hydrogen bonds into a supra-molecular two-dimensional network.

2009-01-01 | S-EPMC2969487 | BioStudies

4-Nitro-N-(8-quinol-yl)benzamide.

Project description:In the title compound, C(16)H(11)N(3)O(3), the amide group is twisted away from the plane of the quinoline benzene ring by 3.93?(5)°, but is twisted away from the nitro-benzene ring by 22.68?(4)°. A weak intra-molecular C-H?O hydrogen bond is observed. In the crystal structure, mol-ecules are linked into a chain along the a axis by inter-molecular C-H?O hydrogen bonds.

1000-01-01 | S-EPMC2959822 | BioStudies

(E)-N'-(4-Pyridylmethyl-ene)-4-(8-quinol-yl-oxy)butanohydrazide 0.25-hydrate.

Project description:The asymmetric unit of the title compound, C(19)H(18)N(4)O(2)·0.25H(2)O, contains two organic mol-ecules and a solvent water mol-ecule with 50% occupancy. The two molecules differ in their conformations: in one mol-ecule it is (+)gauche-trans-trans-(+)gauche-trans, whereas in the other it is (-)gauche-trans-trans-(-)gauche-trans. The dihedral angles between the pyridine ring and the quinoline ring system are 67.4?(3) and 68.0?(2)°. Mol-ecules are linked into a supra-molecular two-dimensional array via N-H?N hydrogen bonds, with each partially occupied water mol-ecule connected via an O-H?O hydrogen bond. C-H?O inter-actions are also present.

1000-01-01 | S-EPMC2968356 | BioStudies

Crystal structures of the two isomeric hydrogen-bonded cocrystals 2-chloro-4-nitro-benzoic acid-5-nitro-quinoline (1/1) and 5-chloro-2-nitro-benzoic acid-5-nitro-quinoline (1/1).

Project description:The structures of two isomeric com-pounds of 5-nitro-quinoline with chloro- and nitro-substituted benzoic acid, namely, 2-chloro-4-nitro-benzoic acid-5-nitro-quinoline (1/1), (I), and 5-chloro-2-nitro-benzoic acid-5-nitro-quinoline (1/1), (II), both C7H4ClNO4·C9H6N2O2, have been determined at 190?K. In each com-pound, the acid and base mol-ecules are held together by an O-H?N hydrogen bond. In the crystal of (I), the hydrogen-bonded acid-base units are linked by a C-H?O hydrogen bond, forming a tape structure along [10]. The tapes are stacked into a layer parallel to the ab plane via N-O?? inter-actions between the nitro group of the base mol-ecule and the quinoline ring system. The layers are further linked by other C-H?O hydrogen bonds, forming a three-dimensional network. In the crystal of (II), the hydrogen-bonded acid-base units are linked into a wide ribbon structure running along [10] via C-H?O hydrogen bonds. The ribbons are further linked via another C-H?O hydrogen bond, forming a layer parallel to (110). Weak ?-? inter-actions [centroid-centroid distances of 3.7080?(10) and 3.7543?(9)?Å] are observed between the quinoline ring systems of adjacent layers. Hirshfeld surfaces for the 5-nitro-quinoline mol-ecules of the two com-pounds mapped over shape index and d norm were generated to visualize the weak inter-molecular inter-actions.

2019-01-01 | S-EPMC6829746 | BioStudies

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