4-Chloro-N-(3-chloro­phen­yl)benzamide

The title compound, C13H9Cl2N, has an intra­molecular C—H⋯O close contact, and presents the NH group syn to the meta-chloro group in the aniline ring and trans to the C=O group. The crystal packing is formed by infinite chains of N—H⋯O hydrogen bonds along the c axis. Cl⋯Cl [3.474 (1) Å] contacts link chains. The crystal used for data collection was a twin, the domains related by the twin law 0.948 (1)/0.052 (1)

From metallic cluster-based ceramics to nematic hybrid liquid crystals: a double supramolecular approach.

International audienceWe describe a new supramolecular approach combining host-guest and electrostatic interactions to design hybrid materials containing polyanionic bulky inorganic compounds and showing liquid crystalline properties

C–halogen…O supramolecular synthons:in situcryocrystallisation of 1,2-dihalotetrafluoroethane/HMPA adducts

The in situ cryocrystallisation technique has been used to obtain four adducts between hexamethylphosphortriamide and 1,2-dihalotetrafluoroethanes having iodine, bromine and chlorine as halogen-bonding donor atoms. These systems allowed for a precise comparison of different C-X···O synthons. The effectiveness and reliability of the pharmacologically important C-Cl···O synthons are proven. © 2013 Copyright Taylor and Francis Group, LLC

Ethyl 4-(1,3-benzodioxol-5-yl)-6-methyl-2-sulfanylidene-1,2,3,4-tetra­hydro­pyrimidine-5-carboxyl­ate

In the title compound, C15H16N2O4S, the dihedral angles between the planes of the benzodioxole and ester groups and the plane of the six-membered tetra­hydro­pyrimidine ring are 89.5 (1) and 20.2 (1)°, respectively. Inter­molecular N—H⋯S hydrogen bonds assemble the mol­ecules into dimers, which are further connected via N—H⋯O inter­actions into chains parallel to [010]. Weak C—H⋯S and C—H⋯π inter­actions enhance the stability of the crystal structure

Ethyl 6-methyl-2-sulfanyl­idene-4-[4-(trifluoro­meth­yl)phen­yl]-1,2,3,4-tetra­hydro­pyrimidine-5-carboxyl­ate

The title compound, C15H15F3N2O2S, adopts a conformation with an intra­molecular C—H⋯π inter­action. The dihedral angles between the planes of the 4-(trifluoro­meth­yl)phenyl and ester groups with the plane of the six-membered tetra­hydro­pyrimidine ring are 81.8 (1) and 16.0 (1)°, respectively. In the crystal structure, inter­molecular N—H⋯S hydrogen bonds link pairs of mol­ecules into dimers and N—H⋯O inter­actions generate hydrogen-bonded mol­ecular chains along the crystallographic a axis

Ethyl 4-(4-chloro­phen­yl)-6-methyl-2-thioxo-1,2,3,4-tetra­hydro­pyrimidine-5-carboxyl­ate

In the title compound, C14H15ClN2O2S, the tetra­hydro­pyrimidine ring adopts a twisted boat conformation with the carbonyl group in an s-trans conformation with respect to the C=C double bond of the six-membered tetra­hydro­pyrimidine ring. The mol­ecular conformation is determined by an intra­molecular C—H⋯π inter­action. The crystal structure is further stabilized by inter­molecular N—H⋯O mol­ecular chains and centrosymmetric N—H⋯S dimers

Ethyl 4-(4-hydroxy­phen­yl)-6-methyl-2-oxo-1,2,3,4-tetra­hydro­pyrimidine-5-carboxyl­ate monohydrate

In the title compound, C14H16N2O4·H2O, the dihedral angles between the planes of the 4-hydroxy­phenyl and ester groups with the plane of the six-membered tetra­hydro­pyrimidine ring are 87.3 (1) and 75.9 (1)°, respectively. The crystal structure is stabilized by O—H⋯O and N—H⋯O hydrogen bonding between the water mol­ecule and the organic functionalities

2-(4-Chloro-3-nitro­phen­yl)-4-(4-chloro­phen­yl)-1,3-thia­zole

The title compound, C15H8Cl2N2O2S, crystallizes with two mol­ecules in the asymmetric unit. The dihedral angles between the 4-chloro-3-nitro­phenyl ring and the thia­zole ring are 0.5 (1) and 7.1 (1)° and those between the 4-chloro­phenyl ring and the thia­zole ring are 7.1 (1) and 7.4 (1)° in the two mol­ecules. The crystal structure is stabilized by inter­molecular C—H⋯Cl and C—H⋯O hydrogen bonds