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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
4.  4-Hex­yloxy-3-methoxy­benzaldehyde 
The title compound, C14H20O3, is a synthetic analogue with a long aliphatic side chain of the important food additive and flavoring agent, vanillin. There are two independent mol­ecules in the asymmetric unit, each having an essentially planar conformation (r.m.s. deviations of 0.023 and 0.051Å for all non–H atoms of the two mol­ecules in the asymmetric unit).
PMCID: PMC2969539  PMID: 21583143
5.  (E)-3-[4-(Pent­yloxy)phen­yl]-1-phenyl­prop-2-en-1-one 
The title compound, C20H22O2, crystallizes with two independent mol­ecules in the asymmetric unit. In each mol­ecule, all the non-H atoms lie in a common plane (r.m.s. deviations of 0.098 and 0.079 Å). There is a π–π stacking inter­action in the crystal structure. The central aromatic rings of the two mol­ecules, which are stacked head-to-tail one above the other, are separated by centroid-to-centroid distances of 3.872 (13) and 3.999 (10) Å.
PMCID: PMC2969684  PMID: 21583142
6.  Ethyl 6-(4-ethoxy­phen­yl)-4-(furan-2-yl)-2-oxocyclo­hex-3-ene-1-carboxyl­ate 
The title compound, C21H22O5, was prepared by NaOH-catalysed cyclo­condensation of 3-(4-ethoxy­phen­yl)-1-(furan-2-yl)prop-2-en-1-one with ethyl acetoacetate. In the crystal, C—H⋯O and C—H⋯π inter­actions link the mol­ecules. In the title mol­ecule, the furan and cyclo­hexene rings are almost parallel [6.77 (11)°] and the cyclo­hexene ring is approximately perpendicular to the benzene ring [84.79 (5)°].
PMCID: PMC2967980  PMID: 21581709

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