forthcoming articles

The di­hydro­imidazole ring in the title mol­ecule is slightly distorted and the lone pair on the tri-coordinate nitro­gen atom is involved in intra-ring π bonding. In the crystal, C—H⋯O hydrogen bonds form inversion dimers, which are connected along the a- and c-axis directions by additional C—H⋯O hydrogen bonds, forming layers parallel to the ac plane.

The structures of seven complexes of general formula LAuX₃ (L = methyl­pyridines or di­methyl­pyridines, X = Cl or Br) are presented. In the crystal packing, a frequent feature is the offset-stacked and approximately rectangular dimeric moiety (Au—X)₂, linked by Au⋯X contacts.

The title mol­ecule is centrosymmetric, with a pyrazine ligand bridging two {Cu₁₀Ir₃} cluster units that are arranged in an unusual shape containing 13 vertices, 22 faces, and 32 sides.

Structures of tetra­pyridine­silver(I) hexa­fluoro­phosphate and tetra­pyridine silver(I) hexa­fluoro­anti­monate are reported from data collected at 300 K and 100 K.

The multi-component solvated Lopinavir crystal was prepared using evaporative methods. The crystal structure is unusual in that although Lopinavir was crystallized in ethyl­ene glycol (ethane-1,2-diol) alone, the unit cell contains four different components, totalling 18 mol­ecules. The stoichiometric ratio of this crystal is eight lopinavir mol­ecules, two ethane-1,2-diol mol­ecules, one (E)-ethene-1,2-diol (C₂H₄O₂) and seven water mol­ecules.