XLVIII.—3 : 5-Dibromo- and 3 : 5-dichloro-phenylhydrazine

2,3-Dibromo-1-(2,4-dichloro-5-fluoro­phen­yl)-3-phenyl­propan-1-one

In the title compound, C(15)H(9)Br(2)Cl(2)FO, the dihedral angle between the two aromatic rings is 6.0 (1)°. The dibromo-ethane fragment of the propan-1-one unit is disordered over two positions, with occupancies of ca 0.83 and 0.17. The crystal structure is stabilized by inter-molecular C-H⋯O hydrogen bonds, C-H⋯π inter-actions, and Br⋯Cl [3.505 (2) and 3.576 (6) Å] and Cl⋯F [3.176 (2) Å] shor...

4,6-Dichloro-5-methoxy­pyrimidine

The mol-ecule of the title compound, C(5)H(4)Cl(2)N(2)O, is close to being planar (r.m.s. deviation = 0.013 Å), apart from the C atom of the meth-oxy group, which deviates by 1.082 (2) Å from the mean plane of the other atoms. In the crystal, short Cl⋯N contacts [3.0940 (15) and 3.1006 (17) Å] generate a three-dimensional framework.

3,5-Dibromo-2′,3′,4′,5′,6′-penta­methyl-1,1′-biphen­yl

In the crystal structure of the title compound, C(17)H(18)Br(2), the benzene rings are almost perpendicular [dihedral angle = 84.0 (3)°]. The crystal structure is consolidated by the presence of C-Br⋯π inter-actions.

Differential modulation of glutamatergic transmission by 3 , 5 - dibromo - L -

Methyl 4′,5-dichloro-2-hy­droxy-4,6-dimethyl­biphenyl-3-carboxyl­ate

In the title compound, C(16)H(14)Cl(2)O(3), the dihedral angle between the mean planes of the two benzene rings is 55.30 (5)°. The methyl ester group lies within the ring plane due to an intra-molecular O-H⋯O hydrogen bond [maximum deviation from the C(8)O(2) mean plane is 0.0383 (13) Å]. In the crystal, mol-ecules are held together by rather weak C-H⋯O hydrogen bonds.