forthcoming articles

The crystal structures of two manganese(II) complexes have been determined. The manganese(II) centers of each structure are six-coordinate with a distorted octa­hedral geometry. Although the bis­(quinolin-2-ylmeth­yl)ethanamine ligands differ only by a methyl group, the structure of one complex is dimeric with bridging acetate ligands and exhibits a trans coordination and coplanarity of the quinolyl moieties, while the second complex is monomeric with a cis coordination of the quinolyl groups.

The title compound was obtained via a two-step synthesis (Dimroth reaction and amidation) for anti­cancer activity screening and was selected from a 1H-1,2,3-triazole-4-carboxamide library. The cyclo­propyl ring is oriented almost perpendicular to the benzene ring [dihedral angle = 87.9 (1)°], while the dihedral angle between the mean plane of the cyclo­propyl ring and that of the triazole ring is 55.6 (1)°. In the crystal, the mol­ecules are linked by O—H⋯O and C—H⋯N inter­actions into infinite ribbons propagating in the [001] direction, which are inter­connected by weak C—H⋯O inter­actions into layers.

A supra­molecular two-dimensional polymer structure of caesium tetra­methyl­dithio­imidodiphosphinate is reported.

The phenyl-quinoxaline moiety in the title compound is not planar. In the crystal, C—H⋯O hydrogen bonds between neighboring quinoxaline rings form chains along the a axis direction.

Single-crystal structure analysis was required to correctly identify the mol­ecular structure and stereochemistry assignment of unexpected impurities in the preparation of a novel pharmaceutical spiro­cyclic imidazole-amine compound.