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Crystal structure of 3-meth-oxy-2-[5-(naphthalen-1-yl)-4,5-di-hydro-1H-pyrazol-3-yl]phenol.

ABSTRACT: In the title compound, C20H18N2O2, the central pyrazoline ring has an envelope conformation with the atom substituted by the naphthalene ring as the flap. It bridges a benzene ring and a naphthalene ring system which are almost normal to one another, making a dihedral angle of 82.03?(6) °. There is an intra-molecular O-H?N hydrogen bond forming an S(6) ring motif. In the crystal, mol-ecules are linked by pairs of N-H?? inter-actions, forming inversion dimers. There are also C-H?? inter-actions present and the dimers are linked via C-H?O hydrogen bonds, forming ribbons propagating along the a-axis direction.

SUBMITTER: Koh D

PROVIDER: S-EPMC4645021 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

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Crystal structure of 3-meth-oxy-2-[5-(naphthalen-1-yl)-4,5-di-hydro-1H-pyrazol-3-yl]phenol.

Koh Dongsoo D

Acta crystallographica. Section E, Crystallographic communications 20151007 Pt 11

In the title compound, C20H18N2O2, the central pyrazoline ring has an envelope conformation with the atom substituted by the naphthalene ring as the flap. It bridges a benzene ring and a naphthalene ring system which are almost normal to one another, making a dihedral angle of 82.03 (6) °. There is an intra-molecular O-H⋯N hydrogen bond forming an S(6) ring motif. In the crystal, mol-ecules are linked by pairs of N-H⋯π inter-actions, forming inversion dimers. There are also C-H⋯π inter-actions p ...[more]

PMID: 26594549

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3-Meth-oxy-2-[5-(naphthalen-2-yl)-4,5-di-hydro-1H-pyrazol-3-yl]phenol.

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Synthesis, crystal structure and Hirshfeld surface analysis of 4-[3-(4-hy-droxy-phen-yl)-4,5-di-hydro-1H-pyrazol-5-yl]-2-meth-oxy-phenol monohydrate.

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4-[3-(Biphenyl-4-yl)-1-phenyl-4,5-di-hydro-1H-pyrazol-5-yl]-3-(4-meth-oxy-phen-yl)-1-phenyl-1H-pyrazole dioxane monosolvate.

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3-(4-Amino-phen-yl)-5-(4-meth-oxy-phen-yl)-4,5-di-hydro-1H-pyrazole-1-carbo-thio-amide.

Project description:In the mol-ecule of title pyrazoline derivative, C17H18N4OS, the pyrazole ring adopts an envelope conformation with the flap atom, which bears the meth-oxy-phenyl substituent, displaced by 0.0750?(12)?Å from the plane through the other ring atoms. The two substituted benzene rings make a dihedral angle of 70.59?(6)°. The meth-oxy group is twisted slightly with respect to the attached benzene ring [Cmeth-yl-O-C-C torsion angle = -8.84?(15)°]. An intra-molecular N-H?N hydrogen bond occurs. In the crystal, the pyrazoline mol-ecules are linked by N-H?O and N-H?S hydrogen bonds into zigzag layers parallel to the bc plane and stacked along the a axis by ?-? inter-actions with centroid-centroid distances of 3.4690?(7) and 3.5792?(7)?Å. C-H?? inter-actions are also present.

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Crystal structure of (E)-2-[(2-bromopyridin-3-yl)methyl-idene]-6-meth-oxy-3,4-di-hydro-naphthalen-1(2H)-one and 3-[(E)-(6-meth-oxy-1-oxo-1,2,3,4-tetra-hydro-naphthalen-2-ylidene)meth-yl]pyridin-2(1H)-one.

Project description:The title compounds C17H14BrNO2, (I), and C17H15NO3, (II), were obtained from the reaction of 6-meth-oxy-3,4-di-hydro-2H-naphthalen-1-one and 2-bromo-nicotinaldehyde in ethanol. Compound (I) was the expected product and compound (II) was the oxidation product from air exposure. In the crystal structure of compound (I), there are no short contacts or hydrogen bonds. The structure does display π-π inter-actions between adjacent benzene rings and adjacent pyridyl rings. Compound (II) contains two independent mol-ecules, A and B, in the asymmetric unit; both are non-planar, the dihedral angles between the meth-oxy-benzene and 1H-pyridin-2-one mean planes being 35.07 (9)° in A and 35.28 (9)°in B. In each mol-ecule, the 1H-pyridin-2-one unit participates in inter-molecular N-H⋯O hydrogen bonding to another mol-ecule of the same type (A to A or B to B). The structure also displays π-π inter-actions between the pyridyl and the benzene rings of non-equivalent mol-ecules (viz., A to B and B to A).

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Crystal structure of 5-(4-meth-oxy-phen-yl)-3-(4-methyl-phen-yl)-4,5-di-hydro-1H-pyrazole-1-carbaldehyde.

Project description:In the title compound, C18H18N2O2, the pyrazole ring has a twisted conformation on the CH-CH2 bond. The tolyl ring and the 4-meth-oxy-phenyl ring are inclined to the mean plane of the pyrazole ring by 4.40?(9) and 86.22?(9)°, respectively, while the two aromatic rings are inclined to one another by 88.75?(9)°. In the crystal, mol-ecules are linked via bifurcated C-H?(O,O) hydrogen bonds and C-H?? inter-actions, forming sheets lying parallel to the ab plane.

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1-[5-(4-Meth-oxy-phen-yl)-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl]ethanone.

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