Three independent mol-ecules comprise the asymmetric unit of the title compound, C(23)H(20)ClF(3)N(4)S. The conformations of the mol-ecules are similar with the chloro-benzene and CF(3)-benzene rings almost perpendicular to, and almost co-planar with, the pyrimidinyl ring [range of dihedral angles = 80.36 (13)-88.07 (14) and 11.89 (14)-23.30 (14)°, respectively]; the benzene rings are roughly o...

The title compound, C(22)H(28)N(2)O(6), crystallizes with four half-mol-ecules in the asymmetric unit: each mol-ecule is located about a crystallographic inversion centre. The central methyl-ene groups of two mol-ecules are disordered over two sets of equally occupied sites. The crystal packing is characterized by sheets of mol-ecules parallel to (14).

In the title mol-ecule, C(14)H(10)Br(2)S, the two benzene rings form a dihedral angle of 48.35 (14)°. The seven-membered ring adopts a boat conformation. In the crystal structure, mol-ecules are related by translation along the b axis and exhibit C-H⋯π inter-actions.

The complete mol-ecule of the title compound, C(16)H(14)N(4), is generated by crystallographic inversion symmetry. In the crystal, mol-ecules are linked by N-H⋯N hydrogen bonds, generating (001) sheets. Weak aromatic π-π stacking inter-actions [centroid-centroid distances = 3.7383 (13) and 3.7935 (14) Å] are also observed.

In the title Schiff base compound, C(15)H(14)FNO, the benzene rings make a dihedral angle of 72.75 (13)°. The mol-ecular structure is stabilized by an intra-molecular O-H⋯N hydrogen bond. In the crystal, weak π-π stacking occurs between the phenol rings of inversion-related mol-ecules, the centroid-centroid distance being 3.7731 (14) Å.

Mol-ecules of the title compound, C(14)H(14)ClNO(2)S, are bent at the S atom with a C-SO(2)-NH-C torsion angle of 57.7 (2)°. The benzene rings are rotated relative to each other by 68.1 (1)°. In the crystal, N-H⋯O(S) hydrogen bonds pack the mol-ecules into infinite chains parallel to the b axis.

The asymmetric unit of the title co-crystal solvate, C(14)H(10)O(4)S(2)·2C(14)H(12)N(2)·C(4)H(8)O, comprises a 2,2'-(disulfanedi-yl)dibenzoic acid mol-ecule, two mol-ecules of 2,9-dimethyl-phenanthroline and a tetra-hydro-furan (THF) solvent mol-ecule. Each end of the twisted diacid [dihedral angle between the benzene rings = 74.33 (17)°] forms a strong O-H⋯N hydrogen bond with a 2,9-dimethyl-p...

1 Investigation of cooperativity in the binding of ligands to the D 2 dopamine receptor. Abstract The D 2 dopamine receptor exists as dimers or as higher order oligomers, based on data from physical experiments. In this study we have sought evidence that this oligomerisation leads to cooperativity by examining the binding of three radioligands ([ 3 H]nemonapride, [ 3 H]raclopride, [ 3 H]spipero...

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