Crystal structure and Hirshfeld surface analysis of the elusive tri­chloro­bis­(di­ethyl ether)oxo­molybdenum(V)

Structural confirmation of the elusive mer-MoCl₃O(Et₂O)₂ com­plex has been achieved through single-crystal X-ray diffraction techniques and Hirshfeld surface analysis.

A new ladder-type silver(I) coordination polymer with 4,4′-bi­pyridine and 4-[(4-carb­oxy­benz­yloxy)meth­yl]benzoate ligands: synthesis, crystal structure, fluorescence properties and Hirshfeld surface analysis

A novel ladder-type silver(I) coordination polymer with 4,4′-bi­pyridine and 4-[(4-carb­oxy­benz­yloxy)meth­yl]benzoate ligands exhibits an obvious Ag—Ag interaction. The legs of the laddder are formed by parallel 4,4′-bipy ligands and silver ions, and the rungs are constructed by Ag—Ag interactions. The com­plex displays favourable fluorescence properties.

Two new polymorphic forms of combretastatin A-4, an anti­tumour agent

Two new polymorphic forms of combretastatin A-4, an inhibitor of tubulin polymerization at the colchicine binding site, were identified. The results confirm the role of weak inter­actions in the determination of crystal architecture and additionally hint at an explanation for the results of crystallization attempts: the new monoclinic form has significantly lower energy than the form reported earlier.

Crystal structure, thermal properties and detonation characterization of bis­(5-amino-1,2,4-triazol-4-ium-3-yl)methane dinitrate

Bis­(5-amino-1,2,4-triazol-4-ium-3-yl)methane dinitrate, BATZM·(NO₃)₂, is a V-shaped mol­ecule that through hydrogen bonding from BATZM to nitrate anions results in a two-dimensional sheet. The com­pound has an energetic content greater than TNT, making it a suitable candidate for explosives.

Structures of five salt forms of di­sulfonated monoazo dyes

The structures of five s-block metal salt forms of three di­sulfonated monoazo dyes are presented. The coordination behaviour of the azo ligands and the water ligands, the dimensionality of the coordination polymers and the overall packing motifs of these five structures are contrasted to those of mono­sulfonate monoazo congers. It is found that two of the com­pounds adopt similar structural types to those of mono­sulfonate species but that the other three structures do not.

The effect of cation–π inter­actions on the stability and electronic properties of anti­cancer drug Altretamine: a theoretical study

Density functional theory (DFT) calculations have been used to study the influence of cation–π inter­actions on the electronic properties of the complexes formed by Altretamine, an anti­cancer drug, with mono- and divalent (Li⁺, Na⁺, K⁺, Be²⁺, Mg²⁺ and Ca²⁺) metal cations.

When solvent becomes reactant: a study of 6-amino­thio­cytosine derivatives

The dissolution of 6-amino­thio­cytosine in common solvents (such as methanol, dimethyl sulfoxide and di­chloro­methane) under alkaline conditions is shown to afford four new com­pounds with a 6-amino­thio­cytosine skeleton. The crystal architectures of these com­pounds are found to be strongly influenced by extensive hydrogen-bond networks, although some individual features are also observed.

A new P,S-coordinating ferrocenyl ligand: synthesis of a precursor and its coordination compounds with Pd^II and Pt^II. Corrigendum

Corrigendum to Acta Cryst. (2014), C70, 460–464.