In the title Schiff base compound, C(12)H(15)N(3)O(2), obtained from a condensation reaction of cyclo-hexa-none and 2-nitro-phenyl-hydrazine, the phenyl-hydrazone group is planar, the largest deviation from the mean plane being 0.0252 (12) Å, and the nitro fragment is twisted slightly with respect to the mean plane, making a dihedral angle of 6.96 (17)°. The cyclo-heaxanone ring displays a chai...

The title compound, C16H22Cl2O, was synthesized from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from the essential oil of the Atlas cedar (Cedrus Atlantica). The mol-ecule is built up from fused six- and seven-membered rings and an additional three-membered ring arising from the reaction of himachalene with di-chloro-carbene. The six-...

In the title compound, C(27)H(21)N(3)O(3), the cyclo-hexa-1,3-diene ring has a screw-boat conformation, and the fused ring system is folded, the dihedral angle between the outer benzene rings being 27.61 (6)°. The N-acetyl-acetamide residue (r.m.s. deviation = 0.0935 Å) has an anti conformation and is essentially perpendicular to the benzene ring to which it is connected [dihedral angle = 89.14...

In the title compound, C(32)H(25)NO(3), the pyrrolidine ring adopts an envelope conformation, whereas the cyclo-hexa-none ring in the tetra-hydro-naphthalene fused-ring system adopts a half-chair conformation. The indanedione unit is oriented at an angle of 58.9 (1)° with respect to the naphthyl ring system. Three intra-molecular C-H⋯O close contacts and an intra-molecular C-H⋯π inter-action ar...

The title compound, C(21)H(24)Br(2)N(2)O(3), was synthesized by the condensation reaction of 3-methoxy-salicylaldehyde with 4-(2-amino-3,5-dibromo-benzyl-amino)cyclo-hexa-nol in a methanol solution. The dihedral angle between the two benzene rings is 76.4 (3)°. The cyclo-hexyl ring adopts a chair configuration. There is an intra-molecular O-H⋯N hydrogen bond which affects the solid state confor...

The title compound, C16H28O, was synthesized by three steps from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from the essential oil of the Atlas cedar (Cedrus atlantica). The mol-ecule is built up from fused six- and seven-membered rings and an appended three-membered ring. The six-membered ring has twist-boat conformation, whereas the...

The title compound, C16H23BrCl2O, was synthesized in three steps from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from the essential oil of the Atlas cedar (cedrus atlantica). The mol-ecule is built up from two fused six- and seven-membered rings, each linked to a three-membered ring. The six-membered ring has a screw-boat conformation...

In the six-membered ring of the low-temperature crystal structure of benzofurazan 1-oxide, C(6)H(4)N(2)O(2), the two C atoms adjacent to the N atoms are linked by a delocalized aromatic bond [1.402 (2) Å]; each is connected to its neighbour by a longer, more localized, bond [1.420 (2), 1.430 (2) Å]. However, the next two bonds in the ring approximate double bonds [1.357 (2), 1.366 (2) Å]. As su...

In the cation of the title compound, C(16)H(14)N(3) (+)·Cl(-)·2H(2)O, the cyclo-hexa-1,3-diene ring displays a screw-boat conformation and the pyridine ring is slightly twisted with respect to the pyrazole ring with a dihedral angle of 4.56 (12)°. In the crystal, ions and water mol-ecules are linked into a three-dimensional network by classical N-H⋯O, N-H⋯Cl, O-H⋯Cl and O-H⋯O hydrogen bonds and...

In the title compound, C28H27NO3, the cyclo-hexa-none and isoxazole rings have envelope conformations, with the methyl-ene and spiro C atoms as the flaps, respectively. The mean plane of the isoxazole ring is inclined slightly to the p-tolyl ring, making a dihedral angle of 14.20 (9)°, and is nearly perpendicular to the mean plane through the tetra-lone moiety and to the meth-oxy-phenyl ring [d...