1. rac-2-tert-Butyl-2,4,5,6,6-penta-chloro-cyclo-hex-3-en-1-one
Elmar Y Mammadov, Mirza A Allahverdiyev, Ayten R Askerova, Bahruz A Rashidov, Abel M Maharramov Acta Crystallogr Sect E Struct Rep Online . 2011 Apr 1;67(Pt 4):o881. doi: 10.1107/S160053681100897X.
The title compound, C(10)H(11)Cl(5)O, is a chiral mol-ecule with two stereogenic centres. However, it crystallizes as a racemate. One of enanti-omers reveals the relative configuration (2S*,5R*). The cyclo-hexene ring adopts a half-chair conformation.
2. N-[4-Acetyl-5-(2-methylprop-1-enyl)-5-(2-p-tolyl-prop-yl)-4,5-dihydro-1,3,4-thia-diazol-2-yl]acetamide
Lahcen El Ammari, Ahmed Benharref, Slimane Dahaoui, Nouzha Bouhmaida, Moha Berraho, Noureddine Mazoir Acta Crystallogr Sect E Struct Rep Online . 2009 May 14;65(Pt 6):o1269-70. doi: 10.1107/S1600536809017127.
The title heterocyclic compound, C(20)H(27)N(3)O(2)S, was synthesized from 2-(4-methyl-cyclo-hex-3-en-yl)-6-methyl-hepta-2,5-dien-4-one, which was isolated from the essential oil Cedrus atlantica. The thia-diazole ring is essentially planar [maximum deviation 0.006 (2) Å] and it forms a dihedral angle of 18.08 (9)° with the benzene ring. The dihedral angle between the thia-diazole ring and the acetamide plane is 7.62 (10)°. In the crystal, mol-ecules are linked into chains running along the c axis by inter-molecular N-H⋯O hydrogen bonds.
3. Dimethyl 2-(3-chloro-phen-yl)-6-hy-droxy-6-methyl-4-(methyl-amino)-cyclo-hex-3-ene-1,3-dicarboxyl-ate
S Amirthaganesan, S Sundaramoorthy, D Velmurugan, Y T Jeong Acta Crystallogr Sect E Struct Rep Online . 2011 Jun 1;67(Pt 6):o1424. doi: 10.1107/S1600536811017089.
In the title compound, C(18)H(22)ClNO(5), the cyclo-hexene ring adopts a distorted half-chair conformation. The mol-ecular structure is stabilized by pairs of intra-molecular N-H⋯O and O-H⋯O inter-actions, generating S(6) motifs. In the crystal, the mol-ecules are linked by inter-molecular C-H⋯O inter-actions, forming centrosymmetric dimers.
