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Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

January 2025 issue

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Cover illustration: Porous materials such as silicalite-1 (SL-1) are important shape-selective catalysts and adsorbents. This report describes the structure of p-xylene@SL-1 obtained by adsorbing p-xylene, where the p-xylene molecules occupy two different positions, one located at the intersection of the straight and sinusoidal channels, and the other in the center of the sinusoidal channel. See: Hwang [Acta Cryst. (2025). E81, 6–10].

research communications


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A compound of composition [Cu(C5H7O2)2(C8H9N3)] was obtained. In the crystal, the CuII ion exhibits a square-pyramidal geometry with the ligands (two acetyl­acetone and one 2-amino-1-methyl­benzimidazole). Hirshfeld surface analysis was used to investigate the inter­molecular inter­actions.

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In order to observe the maximum adsorption amount and arrangement state of p-xylene mol­ecules in a microporous single-crystal of silicalite-1 (SL-1), single-crystal X-ray diffraction analysis was performed.

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In the title compound, a central sp3-hybridized carbon atom is decorated with three hepta­fluoro-2-meth­yloxy(cyclo­pent-1-ene) arms and a methyl group. The primary packing is determined by C—F⋯F—C inter­actions, forming [001] chains, which are consolidated via weaker C—F⋯F—C and C—H⋯F—C contacts.


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The title compound consists of one anti-4-(19H,59H-3-aza-1,5(3,9)-dicarbazola­cyclo­octa­phane-3-yl)benzo­nitrile (host mol­ecule) and one di­chloro­methane solvate mol­ecule. The host mol­ecule adopts an anti configuration, in which two carbazole rings are partially overlapped, forming an intra­molecular π–π inter­action. In the crystal, the mol­ecules are cross-linked via inter­molecular host–host and host–guest C—H⋯π inter­actions, forming a three-dimensional network.

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The crystal structure of luliconazole (LCZ) has been determined. The di­thiol­ane ring adopts an envelope conformation. In the crystal, two inter­molecular C—H⋯N hydrogen bonds are observed.

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In the title compound, the cadmium cations are octa­hedrally coordinated by four bromide anions and two 2–5-di­methyl­pyrazine ligands and linked into chains via pairs of μ-1,1-bridging Br anions that are further connected into layers by the bridging 2,5-di­methyl­pyrazine coligands.

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The crystal structure of the title compound contains infinite inorganic two-dimensional layers formed by [GeI6]4− octa­hedra. These layers are inter­leaved with the organic 2-iodo­ethyl­ammonium cations.

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Crystals of a multi-aromatic substituted 1,2,3-triazole have an extensive hydrogen-bonding network with two water and two aceto­nitrile mol­ecules participating in the structure. The compound is a dimer serving as a starting material for higher oligomers and mol­ecules featuring extensive functionality.

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The hybrid perovskite (C2H8NO)2[SnBr4] features polymeric inorganic layers formed by corner-sharing {SnBr6} octa­hedra, which alternate with the organic cations.

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The CuII and ZnII complexes containing 1,1′-[(3-fluoro­phen­yl)methyl­ene]bis­[3-(3-fluoro­phen­yl)imidazo[1,5-a]pyridine] show potential as cancer treatment agents. The crystal-structure determination of the CuII complex confirms a distorted tetra­hedral N2Cl2 coordination set for the CuII atom.

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The asymmetric unit of the title compound contains one 2,2,6,6 tetra­methyl­piperidine-1-ium cation, one 1,2,3,4-tetra­fluoro-5,6-di­iodo­benzene mol­ecule, and one uncoordinated bromide anion. In the crystal, the bromide anions link the 2,2,6,6-tetra­methyl­piperidine mol­ecules by inter­molecular C—H⋯Br and N—H⋯Br hydrogen bonds, leading to dimers, with the coplanar 1,2,3,4-tetra­fluoro-5, 6-di­iodo­benzene mol­ecules filling the space between them.

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In the crystal structure of the title compound, Co(NCS)2(C6H7N)2 (C6H7N = 4-methyl­pyridine), the CoII cations are in an alternating octa­hedral all-trans and cis-cis-trans coordination and linked into corrugated chains by pairs of μ-1,3 bridging thio­cyanate anions.

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The mol­ecular and crystal structure of the tetra­aqua­bis­{2-[(5-methyl-1,3,4-thia­diazol-2-yl)sulfan­yl]acetato}­cobalt(II) complex were studied and Hirshfeld surfaces and fingerprint plots were generated to investigate the various inter­molecular inter­actions.

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The substituents on the phenyl ring are rotated slightly out of the mean plane of the ring while the piperidine moiety is nearly perpendicular to that plane. In the crystal, C—H⋯O hydrogen bonds form chains of mol­ecules extending along the c-axis direction, which are linked by C=O⋯π(ring) inter­actions. A Hirshfeld surface analysis showed the majority of inter­molecular inter­actions to be H⋯H contacts while O⋯H/H⋯O contacts are the second most numerous.

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The crystal structures of a fused tetra­cyclic benzoate and its epimer obtained in synthetic study of Paclitaxel are described. The corresponding ring conformations in both tetra­cycles are similar; however, one epimer shows two orientational disorders and while none occurs for the other. In each crystal, pairs of inter­molecular O—H⋯O hydrogen bonds connect the mol­ecules into inversion dimers. The dimers are further linked by weak inter­molecular C—H⋯O and/or C—H⋯π inter­actions.

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The synthesis, crystal structure, Hirshfeld surface analysis, and anti­fungal assessment of a new monohydrated Schiff base with a triazole moiety are reported.

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In the title Schiff base binuclear lanthanum(III) complex, the two metal ions have the same environment and the LaIII ion is coordinated by three soft nitro­gen atoms from the Schiff base ligand, four hard oxygen atoms from carboxyl­ate co-ligands and two water oxygen atoms. Each LaIII ion is nine coordinate and its environment is best described as a tricapped trigonal–prismatic geometry.

Research communications

Research communications are designed to help authors bring out the science behind their structure determinations. Authors are encouraged to report more than one structure in the same communication and also to include the results of investigations with other techniques. The Research communications format makes Acta E the natural home for structure determinations with interesting science to report.

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