metal-organic compounds
Open access
The title compound, [Cu6I6(C2H6N2S)6], was obtained from the reaction of copper(I) iodide with N-methylthiourea (Metu) in equimolar amounts in acetonitile. The complex consists of two six-membered trinuclear Cu3S3I3 cores that combine through triply bridging Metu, forming a hexanuclear core which has -3 symmetry. The CuII atom is coordinated by three S atoms of Metu and one iodide ion in a distorted tetrahedral geometry. The crystal structure is stabilized by N—HI hydrogen bonds and cuprophilic interactions [CuCu = 3.0264 (9) Å].
organic compounds
Open access
The title dammarane tritepene, 3α,20(S)-dihydroxydammar-24-ene, which crystallized out in a hydrated form, C30H52O2.1.075H2O, was isolated from the Aglaia eximia bark. The three cyclohexane rings adopt chair conformations. The cyclopentane has an envelope conformation with the quaternary C at position 14 as the flap atom with the maximum deviation of 0.288 (2) Å. The methylheptene side chain is disordered over two positions with 0.505 (1):0.495 (1) site occupancies and is axially attached with an (+)-syn-clinal conformation. The hydroxyl group at position 3 of dammarane is in a different conformation to the corresponding hydroxyl in Dammarenediol II. In the crystal, the dammarane and water molecules are linked by ODammarane—HOwater and Owater—HODammarane hydrogen bonds into a three-dimensional network.
organic compounds
Open access
The title compound, C16H13Cl2F3N2, exists in an E conformation with respect to the C=N bond [1.2952 (11) Å] and the C—N—N=C torsion angle is 175.65 (8)°. The dihedral angle between the benzene rings is 42.09 (4)°. An intramolecular C—HF hydrogen bond generates an S(6) ring. In the crystal, the molecules are linked into [101] chains by C—HF hydrogen bonds.