The asymmetric unit of the title compound, [Sn(CH(3))(2)Cl(2)(C(14)H(14)N(2))], contains two crystallographically independent mol-ecules. In each mol-ecule, the Sn(IV) atom is six-coordinated in a distorted octa-hedral geometry by one bidentate 2,4-di-methyl-N-(pyridin-2-yl-methyl-idene)aniline ligand, two methyl groups and two Cl atoms. In the crystal, inter-molecular C-H⋯Cl hydrogen bonds lin...

In the title mol-ecule, C(26)H(25)Br(3)N(2), a dihedral angle of 6.15 (10)° is present between the carbazole and benzene ring systems with an E conformation about the C=C bond [1.335 (4) Å]. The butyl group is almost perpendicular to the carbazole plane [C-N-C-C torsion angle = -98.7 (3)°]. In the crystal, supra-molecular double chains along [-7,18,-16] are formed via C-H⋯Br and π-π inter-actio...

In the title compound, C(11)H(15)N(3)O(3), one of the methyl groups attached to the benzamide unit is slightly twisted with a C-N-C-C torsion angle of 4.04 (13)°. The crystal packing is stabilized by weak intermolecular C-H⋯O hydrogen bonds together with a weak C-H⋯π inter-action.

The title compound, C(25)H(26)O(2), crystallizes with two crystallographically independent mol-ecules in the asymmetric unit. The differences between the two mol-ecules are marginal. The three benzene rings of each mol-ecule are in a propeller orientation and the 1,3-dioxane ring adopts a chair conformation.

In the title compound, C12H12N2O2, synthesized by ammonolysis of 3-phenyl-isoxazole-5-carbonyl chloride in di-chloro-methane, the dihedral angle between the isoxazole ring and the phenyl ring is 14.05 (7)°. In the crystal, centrosym-metrically related mol-ecules are linked into dimers by pairs of C-H⋯O hydrogen bonds, generating rings of graph-set motif R 2 (2)(10).

In the title mol-ecular salt [systematic name: triethyl-ammonium 1,3-dimethyl-2,6-dioxo-5-(2,4,6-trinitro-phen-yl)-1,2,3,6-tetra-hydro-pyrimidin-4-olate], C(6)H(16)N(+)·C(12)H(8)N(5)O(9) (-), the dihedral angle between the aromatic rings in the anion is 46.88 (8)°. The nitro group para to the ring junction is almost coplanar with its attached ring [dihedral angle = 0.76 (3)°], but the two ortho...

A simplified method is described for the preparation of 14 alpha-hydroxymethyl-4,4-dimethyl-5 alpha-cholest-8-en-e beta-ol, 14 alpha-hydroxymethyl-4,4-dimethyl-5 alpha-cholest-7-en-3 beta-ol, and 14 alpha-hydroxymethyl-4,4-dimethyl-5-alpha-cholest-6-en-3 beta-ol from commercial lanosterol. This method represents a modification of the approach introduced by Fried and co-workers (Fried, J., J. W....