In the title compound, [Mg(H(2)O)(6)]Br(2)·2C(6)H(5)N(5), the Mg(II) atom, lying on an inversion center, is coordinated by six water mol-ecules in a distorted octa-hedral geometry. The pyridine and tetra-zole rings in the 5-(pyridinium-3-yl)tetra-zol-1-ide zwitterion are nearly coplanar, twisted from each other by a dihedral angle of 5.70 (1)°. The zwitterions, Br anions and complex cations are...

In the title co-crystal, C(12)H(11)Br(2)N(3)O·C(4)H(5)NO(2), the naphthyridine derivative and the pyrrolidine-2,5-dione mol-ecules have crystallographic mirror-plane symmetry with all non-H atoms, except the Br atom, located on the mirror plane. In the crystal, N-H⋯N, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into heterodimers. These dimers are further linked into a one-dimensional str...

2-Mercapto-1-methyl-imidazoline (N(2)C(4)H(6)S) is converted at room temperature into 2-bromo-1-methyl-imidazole (N(2)C(4)H(5)Br) in presence of copper(I) bromide in acetonitrile-chloroform mixture via extrusion of sulfur as sulfate and oxidation of Cu(I) into Cu(II). 2-Bromo-1-methyl-imidazole was isolated as its self assembled tetranuclear Cu(II) cluster, [Cu(4)(η(1)-N-(N(2)C(4)H(5)Br)(4)(μ(4...

The semiempirical kinetic method has been used to determine the ratio of cetyltrimethylammonium bromide, CTABr, micellar binding constants of counterions X (K(X)) and Br (K(Br)), i.e., K(X)/K(Br) (= R(X)(Br)) for X = dianionic 5-methyl- and 5-methoxysalicylate ions. The values of K(X) and K(Br) have been derived from the kinetic parameters obtained in the presence of spherical/nonspherical and ...

The influence of the substituent at the C2 position on the hydrogen-bonding patterns is compared for a series of five related compounds, namely (±)-3-exo,6-exo-dibromo-5-endo-hydroxy-3-endo-nitrobicyclo[2.2.1]heptane-2-exo-carbonitrile, C(8)H(8)Br(2)N(2)O(3), (II), (±)-3-exo,6-exo-dibromo-6-endo-nitro-5-exo-phenylbicyclo[2.2.1]heptan-2-endo-ol, C(13)H(13)Br(2)NO(3), (III), (±)-methyl 3-exo,6-ex...

The CLEO collaboration has studied two-body charmless hadronic decays of B mesons into nal states containing two pseudo-scalar mesons, or a pseudo-scalar and a vector meson. We summarize and discuss results presented during the winter/spring 1999 conference season, and provide a brief outlook towards future attractions to come. In particular, CLEO presented preliminary results on the decays B !...

In the title compound, C(15)H(10)Br(2)F(2)O, the dihedral angle between the two 3-fluoro-substituted benzene rings is 5.7 (5)°. The two bromine substituents on the chalcone moiety are close to anti as the Br-C-C-Br torsion angle is 176.9 (7)°. Weak C-Br⋯π inter-actions may contribute to the crystal stability.

The title compound, C(15)H(12)Br(2), comprises a norbornane unit having a dibromo-naphthalene ring fused on one side. Both Br atoms are twisted slightly out of the plane of the naphthalene ring system with a Br-C-C-Br torsion angle of 5.3 (5)°. In the crystal, mol-ecules are linked by weak inter-molecular C-H⋯Br hydrogen bonds, forming an infinite C(9) chain along [110].