Synthesis, structure and photophysical properties of two tetra­nuclear copper(I) iodide com­plexes based on acetyl­pyridine and diphosphine mixed ligands

Two copper(I) iodide tetra­mers have been synthesized from reactions of CuI, 1,3-bis­(diphenyphosphan­yl)propane and 3- or 4-acetyl­pyridine. Structure analysis and photoluminescence studies indicate that the position of the acetyl group on the heterocyclic ligand has an obvious influence on the structural arrangement, inter­molecular inter­action and photophysical properties.

Conformational analysis of two new organotin(IV) structures com­pleted with a CSD survey

The con­formational analysis of two new organotin(IV) com­plexes and their analogous structures from the Cambridge Structural Database (CSD) are presented. The factors influencing the con­formational behaviours and the CSD structures with inter­esting structural geometry parameters are studied.

The structure of Ce₂Al₃Ge₄ refined for the first time from single-crystal X-ray diffraction data

Single crystals of dicerium trialuminium tetra­germanide, Ce₂Al₃Ge₄, have been synthesized from a high-temperature reaction using an eutectic mixture of Al and Ge as a metal flux. Through single-crystal X-ray diffraction it was established that Ce₂Al₃Ge₄ crystallizes in the centrosymmetric space group Cmce (No. 64) with the Ba₂Cd₃Bi₄ structure type (Pearson code oC36).

Δ⁹-Tetra­hydro­cannabinolic acid A, the precursor to Δ⁹-tetra­hydro­cannabinol (THC)

Δ⁹-Tetra­hydro­cannabinolic acid A (THCA-A) crystallizes in the space group P2₁2₁2₁, with Z′ = 2, and has the two independent mol­ecules related by a pseudo-twofold axis. The two independent carboxyl­ate groups form a nonplanar (8) hydrogen-bonded ring, with an inter­planar angle of 28.89 (8)°.

Alkali and alkaline earth coordination polymers constructed from benzene-1,2,4,5-tetra­carb­oxy­lic acid and flexible di­carboxyl­ate acid ligands: syntheses, structures and spectroscopic and thermal properties

Two new alkali/alkaline earth coordination polymers were prepared from benzene-1,2,4,5-tetra­carb­oxy­lic acid as a rigid polycarboxyl­ate metal linker and two types of flexible di­carboxyl­ate ligands as the second linker under similar hydro­thermal reaction conditions. The polymers were structurally characterized by single-crystal X-ray diffraction. The flexible di­carboxyl­ate ligands play an important role in tuning the detailed structures and characteristics of the com­plexes.

Manganese(II) com­plexes derived from acyclic ligands having flexible alcohol arms: structural chracterization and SOD and catalase mimetic studies

Seven com­plexes of four pyridine/dimine ligands having two flexible alcohol arms have been prepared and their structures determined. The com­plexes were found to catalyze the catalytic dismutation of both peroxide and superoxide, and only show catalase-like activity in the presence of a base. The com­plexes with coordinated water or chloride at the axial positions show higher superoxide dismutase activity than those with coordinated thio­cyanate ligands.

Honeycomb mol­ecular network based upon a hydrate of 4,6-di­chloro­resorcinol and the photoproduct rtct-tetra­kis­(pyridin-4-yl)cyclo­butane

The formation of a self-inter­penetrated honeycomb mol­ecular network based upon 4,6-di­chloro­resorcinol, water, and the photoproduct rtct-tetra­kis­(pyridin-4-yl)cyclo­butane is reported. The photoproduct acts as a three-connected node to form a honeycomb network that contains channels running along the crystallographic b axis.

Structural characterization and theoretical calculations of the monohydrate of the 1:2 cocrystal salt formed from acriflavine and 3,5-di­nitro­benzoic acid

A monohydrate of the 1:2 cocrystal salt formed from acriflavine and 3,5-di­nitro­benzoic acid was synthesized and structurally characterized. Detailed analysis and theoretical calculations of the inter­molecular inter­actions occurring in the crystal, with an emphasis on inter­actions involving nitro groups, were carried out.