The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section C: Structural Chemistry.
The first crystal structures of six- and seven-membered tellurium- and nitrogen-containing (Te—N) heterocycles: 2H-1,4-benzotellurazin-3(4H)-one and 2,3-dihydro-1,5-benzotellurazepin-4(5H)-one
The structures of a six- and a seven-membered tellurium- and nitrogen-containing (Te—N) heterocycle represent the first structurally characterized members of their respective classes. When compared to their sulfur analogs, they exhibit slightly greater deviations from planarity to accommodate the larger chalcogenide atom. Intermolecular N—H⋯O hydrogen bonding forms centrosymmetric (8) dimers in the six-membered hetereocyclic compound and chains in the seven-membered hetereocyclic compound, while intermolecular Te⋯O contacts exist in the former. [OK]
Synthesis, crystal structure and magnetic properties of a two-dimensional cyanide-based heterometallic coordination polymer with cationic piperazinium ligands: poly[aquatetra-μ2-cyanido-κ8C:N-dicyanido-κ2C-(piperazinium-κN4)cobalt(III)copper(II)]
A two-dimensional cyanide-bridged bimetallic coordination polymer [CuIICoIII(CN)6(Hpip)(H2O)]n (Hpip is piperazinium) exhibits a two-dimensional (4,4) grid-like structure, in which cationic [CuII(Hpip)(H2O)]3+ and anionic [CoIII(CN)6]3− units are linked through bridging cyanide ligands. The grid is further extended into a three-dimensional supramolecular network through hydrogen-bonding interactions. A magnetic investigation shows antiferromagnetic coupling in the compound.