Subscribe: Forthcoming article in Acta Crystallographica Section E: Structure Reports
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Forthcoming article in Acta Crystallographica Section E Crystallographic Communications

Acta Crystallographica Section E: Crystallographic Communications is the IUCr's popular open-access structural journal. It provides a simple and easily accessible publication mechanism for inorganic, metal-organic and organic crystal structure determinati


Crystal structure of {(S)-1-phenyl-N,N-bis­[(pyridin-2-yl)meth­yl]ethanamine-κ3N,N′,N′′}bis­(thio­cyanato-κN)zinc(II) from synchrotron data
The ZnII ion in the title compound shows a distorted square-pyramidal coordination geometry with three N atoms of the chiral S-ppme ligand and two N atoms of the thio­cyanate anions. In the crystal, mol­ecules are connected by hydrogen bonds and π–π inter­actions, forming a two-dimensional supra­molecular network parallel to the bc plane.

Disorder of the dimeric TCNQ–TCNQ unit in the crystal structure of [Ni(bpy)3]2(TCNQ–TCNQ)(TCNQ)2·6H2O (TCNQ is 7,7,8,8-tetra­cyano­quinonedi­methane)
The first example of an NiII complex containing an σ-dimerized TCNQ–TCNQ unit is presented, with a C—C bond length of 1.653 (11) Å. In addition, the σ-dimerized TCNQ–TCNQ unit (refined 75% occupancy) is disordered, forming also a less populated pair of TCNQ mol­ecules (25% occupancy) with tightly π-stacked di­cyano­methanide groups.

Crystal structure of bis­(μ-N-hy­droxy­picolin­amid­ato)bis­[bis­(N-hy­droxy­picolinamide)­sodium]
In the crystal, the coordination dimers are linked via N—H⋯O, N—H⋯N and C—H⋯O hydrogen bonds and π–π stacking inter­actions into a two-dimensional framework parallel to (100).

Crystal structures of (E)-4-[1-(2-carbamo­thio­yl­hydrazinyl­idene)eth­yl]phenyl acetate and (E)-4-[1-(2-carbamo­thio­ylhydrazinyl­idene)eth­yl]phenyl benzoate
In the title compounds, the thio­semicarbazone group adopts an extended conformation, and there is a short N—H⋯N contact present forming an S(5) ring motif. In the crystals of both compounds, mol­ecules are linked by pairs of N—H⋯S hydrogen bonds, forming dimers with R_{2}^{2}(8) ring motifs.

Crystal structure of N-(7-di­bromo­methyl-5-methyl-1,8-naphthyridin-2-yl)benzamide–pyrrolidine-2,5-dione (1/1)
The title crystal is a co-crystal with the 1,8-naphthyridine derivative crystallizing with one mol­ecule of succinimide per formula unit. In the crystal, the two mol­ecules are mutually linked by N—H⋯O and N—H⋯N hydrogen bonds. The packing is consolidated by C—H⋯(O,N) hydrogen bonds and π–π stacking inter­actions.

Crystal structure of (6E,20E)-3,24-di­fluoro-13,14,28,29-tetra­hydro-5H,22H-tetra­benzo[e,j,p,u][1,4,12,15]tetra­oxa­cyclo­docosine-5,22-dione
The conformation of the title compound is cone-shaped, partially determined by short intra­molecular C—H⋯O contacts. In the crystal, mol­ecules are linked via C—H⋯O and C—H⋯F hydrogen bonds and C—H⋯π inter­actions, forming a three-dimensional supra­molecular structure.

Crystal structure of bis­{μ-(E)-2-[(2-oxido­phenyl­imino)­meth­yl]quinolin-8-olato-κ4O,N,N′,O′}bis­[di­butyl­tin(IV)]
The title compound crystallizes with two independent centrosymmetric dimers in the unit cell, each featuring a typical pincer-type structure where the dianionic ligand is tetra­dentate, coordinating to the central tin atom through both phenolate oxygen atoms, as well as through the quinoline and imine N atoms. Each metal atom adopts a distorted penta­gonal–bipyramidal SnC2N2O3 coordination arising from the N,N′,O,O′-tetra­dentate deprotonated Schiff base and two butyl groups in the axial sites.