(E)-4-Bromo-2-[(phenyl­imino)­meth­yl]phenol: a new poly­morph and thermochromism

A novel poly­morph of (E)-4-bromo-2-[(phenyl­imino)­meth­yl]phenol is reported, with a dihedral angle between the planes of the two aromatic rings of 45.6 (1)°, significantly different to that of the previously published poly­morph. The structure contains an intra­molecular O—H⋯N hydrogen bond forming an S(6) ring.

Platinum(II) com­plex with 4-nitro-N-(pyridin-2-yl­methyl­idene)aniline: synthesis, characterization, crystal structure and anti­oxidant activity

A novel com­plex has been prepared using the (E)-4-nitro-N-(pyridin-2-yl­methyl­idene)aniline bidentate Schiff base ligand and PtCl₂. The neutral mol­ecules form a one-dimensional chain structure through C—H⋯Cl and C—H⋯O hydrogen bonds. DPPH and ABTS inhibition studies revealed that the com­pound is proficient in donating electrons or H atoms and subsequently terminating chain reactions in a dose-dependent manner.

Crystal structures of salts of bedaquiline

The single-crystal structures of three salts of bedaquiline, a drug used for the treatment of drug-resistant tuberculosis (TB), are described.

Two new Cd^II MOFs of 1,4-bis­(1H-benzimidazol-1-yl)butane and flexible di­carboxyl­ate ligands: luminescence sensing towards Fe³⁺

Two new Cd^II MOFs based on 1,4-bis­(1H-benzimidazol-1-yl)butane and pimelate/sebacate (Pim/Seb) mixed ligands have been synthesized under hydro­thermal conditions. Structure analysis reveals that the Pim MOF is a 2D sql layer structure containing a (H₂O)₈ water cluster. The Seb MOF shows an 8-connected hex supramolecular structure based on the hxl layer. Luminescence sensing studies reveal that both MOFs have good selectivity and sensitivity for the detection of the Fe³⁺ cation in water.

Crystal structure of monoclinic hafnia (HfO₂) revisited with synchrotron X-ray, neutron diffraction and first-principles calculations

This work reports the precise crystal structure parameters of monoclinic hafnia (HfO₂) and its validation from first-principles calculations. Complementary synchrotron X-ray and neutron diffraction experiments were performed and it was observed that the high-resolution neutron diffraction data significantly improves the precision of the constituent O-atom positions in bulk HfO₂ relative to that obtained from earlier X-ray diffraction studies.