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1.  1-[5-(4-Meth­oxy­phen­yl)-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl]ethanone 
The title mol­ecule, C18H18N2O2, is V-shaped with the pyrazoline moiety being inclined to the adjacent phenyl ring by an angle of 6.49 (9)°, while the 4-meth­oxy-substituted ring is inclined to the pyrazoline ring by 82.99 (9)°. In the crystal, adjacent mol­ecules are linked by C—H⋯O inter­actions, forming chains propagating in [100]. There are also C—H⋯π inter­actions involving adjacent mol­ecules and those related by an inversion center.
PMCID: PMC3011559  PMID: 21589470
2.  1-{5-[4-(Hex­yloxy)phen­yl]-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl}ethanone 
The crystal structure of the title compound, C23H28N2O2, is composed of discrete mol­ecules with bond lengths and angles quite typical for pyrazoline derivatives of this class. The plane containing the pyrazoline unit is nearly planar with the mean plane of the phenyl ring at the 3-position, making a dihedral angle of 1.96 (3)°. The crystal packing is stabilized by weak C—H⋯π inter­actions involving both of the aromatic rings.
PMCID: PMC2983223  PMID: 21587501
3.  (E)-4-Nitro­benzaldehyde oxime 
In the title compound, C7H6N2O3, the planes containing the CNO and ONO atoms subtend dihedral angles of 5.47 (5) and 8.31 (5)°, respectively, with the benzene ring. In the crystal structure, inter­molecular O—H⋯N hydrogen bonds link the mol­ecules into centrosymmetric dimers with an R 2 2(6) graph-set motif.
PMCID: PMC2979095  PMID: 21579179

Results 1-3 (3)