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Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

April 2022 issue

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Cover illustration: Hybrid organic–inorganic halide salts have long been studied for optoelectronic applications because of their versatile photophysical properties combined with the tunability of their electronic and crystal structures. In particular, research has focused on engineering hybrid halometallate salts with large organic cations to improve air, moisture and thermal stability. Against this background, three new isomorphous 0-D hybrid salts of general formula [L]2[MCl4] (L = imidazo[1,5-a]pyridinium-based organic cation, M = Zn, Cd, X = Cl, Br, I), namely, 2-methyl­imidazo[1,5-a]pyridinium tri­chlorido­iodido­zincate(II), 2-methyl­imidazo[1,5-a]pyridinium di­bromido­dichlorido­cadmate(II) and 2-methyl­imidazo[1,5-a]pyridinium tri­chlorido­iodido­cadmate(II), have been synthesized and characterized both structurally and spectroscopically. See Vassilyeva, Buvaylo, Kokozaya & Skelton [Acta Cryst. (2022). E78, 359–364].

research communications


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The title Schiff base compound, synthesized by the condensation reaction of methyl 3-amino-4-methyl­benzoat and glyoxal in ethanol, crystallizes in the the monoclinic space group P21/n. The mol­ecule is Z-shaped with the C—N—C—C torsion angle being 47.58 (18)°. In the crystal, pairs of mol­ecules are linked via C—H⋯N hydrogen bonds, forming centrosymetric dimers with an [R_{2}^{2}](8) ring motif; this conectivity leads to the formation of columns running along the a-axis direction.

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The structure of racemic (R/S,E)-2-(4-hy­droxy­phen­yl)-4-(2-phenyl­hydrazin-1-yl­idene)chromane-5,7-diol ethanol monosolvate, has been determined. The packing is assisted by C—H⋯O, O—H⋯O, O—H⋯N and O—H⋯C(π) type hydrogen bonds, and the pyran ring has an envelope pucker.

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In the title Schiff base tetra­nuclear copper(II) complex, two discrete environments are present in the structure: CuNO4 and CuNO3. Two copper(II) cations are situated in distorted square-pyramidal environment, while two copper(II) cations are located in a slightly square-planar geometry. One bridging acetate group acting in an η112-mode connects two copper(II) ions, while another bridging acetate group connects three copper(II) ions in an η1:-η2–μ3-mode.

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The crystal structure and supra­molecular inter­actions of a new terbium(III) complex with an acetohydrazide ligand are reported.

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The three isomorphous hybrid salts are assembled from discrete 2-methyl­imidazo[1,5-a]pyridinium cations and ZnII or CdII tetra­halometallate anions that show disorder involving partial substitution of Br by Cl and Cl by I in the [CdBr2.42Cl1.58]2–, [CdCl3.90I0.10]2– and [ZnCl3.19I0.81]2– anions.

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The crystal structure of the free base of the ubiquitous neurotransmitter serotonin is reported for the first time.

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The double-bond system of the acrylo­nitrile moiety is significantly non-planar and displays one very wide angle C—C(CN)=C.

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The crystal structure and Hirshfeld surface analysis of 7,7-dimethyl-2-phenyl-3,3a,4,6,7,8,9,9a-octa­hydro-1H-benzo[f]iso­indole-1,5(2H)-dione obtained via the reaction of N-allyl-N-phenyl­acryl­amide with 3-iodo­cyclo­hex-2-en-1-one using PdCl2(PPh3)2 as a catalyst,, is reported.

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The crystal structure of methanol imidazole featuring a tri-mol­ecule hydrogen-bonded macrocycle is described.

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The crystal structures of anhydrous and hydrated ceftibuten are reported. Both crystallize as zwitterions.

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Bis(catecholato)bis­(DMSO)titanium crystallizes with two crystallographically independent mol­ecules related by pseudo-glide symmetry in a distorted octa­hedral O6 donor-atom geometry around titanium.

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Normal mode structural decomposition (NSD) shows the title chlorin compounds to have considerable saddling deformation from planarity.

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The title heterobimetallic silver(I)–vanadium(V) oxide-fluoride compound is built on the {Ag2(VO2F2)2(tr)4} secondary building unit supported by 1,2,4-triazole ligands [4-benzyl-(4H-1,2,4-triazol-4-yl)].

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The packing of the title compound features C—H⋯O hydrogen bonds, C—F⋯π inter­actions, aromatic π–π stacking and short Br⋯O contacts.

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The asymmetric unit of 2-(2-hy­droxy­phen­yl)quinoline-6-sulfonamide contains two crystallographically independent mol­ecules. The crystal structure features hydrogen bonding and π–π stacking inter­actions.

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The channel structure of trithallium penta­anti­monate(V) Tl3Sb5O14 is characterized and compared to the K, Rb and Cs analogues.

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Recently, inter­est in the isosteric replacement of a nitro­gen atom to selenium, sulfur or oxygen atoms has been highlighted in the design of potential inhibitors for cancer research. In this context, the structures of 5-(1H-indol-3-yl)-2,1,3-benzotriazole derivatives [5-(1H-indol-3-yl)-2,1,3-benzo­thia­diazole (bS, C14H9N3S) and 5-(1H-indol-3-yl)-2,1,3-benzoxa­diazole (bO, C14H9N3O)], as well as a synthesis inter­mediate of the selenated bioisostere [5-[1-(benzensulfon­yl)-1H-indol-3-yl]-2,1,3-benzoselena­diazole (p-bSe, C20H13N3O2SSe)] were determined using single-crystal X-ray diffraction (SCXRD) analyses.

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In the title compound, the di­hydro­quinoline moiety is not quite planar and an intra­molecular C—H⋯O hydrogen bond helps to establish the rotational orientation of the carboxyl group. In the crystal, sheets of mol­ecules parallel to (10[\overline{1}]) are generated by C—H⋯O and C—H⋯Cl hydrogen bonds.

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The title coordination pyrazole-containing coordination polymer, was synthesized using a one-pot reaction of copper powder, anhydrous copper(II) sulfate and 3,5-dimethyl-1H-pyrazole (Hdmpz) in aceto­nitrile under ambient conditions. The crystal structure is built up from packed parallel polymeric chains, which are stabilized by an extensive hydrogen-bond network, which forms with the participation of bridging sulfate ligands.

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In the title compound, the thio­urea chromophore is planar to an r.m.s deviation of 0.032 Å with the thiol­ate sulfur atom being the most deviated. Bifurcated N—H⋯O intra­molecular hydrogen bonds result in an S(6) supra­molecular synthon. In the crystal, mol­ecules are linked by N—H⋯O inter­molecular hydrogen-bonding inter­actions and stabilized by C—H⋯π and π–π inter­actions.

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The title compound was synthesized efficiently in the solid state by exploiting pepsin catalysis. The ring systems are nearly coplanar. A short intra­molecular S⋯O=C contact is observed.

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The mol­ecule of the title compound contains an essentially planar indole ring system and a phenyl ring. In the crystal, the mol­ecules are linked by a weak inter­molecular C—H⋯O hydrogen bond and C—H⋯π inter­actions, forming a two-dimensional network structure.

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In the crystal, the mol­ecules are linked by N—H⋯N and C—H⋯N hydrogen bonds, forming double layers parallel to the (001) plane. The layers are connected by van der Waals inter­actions, generating a three-dimensional supra­molecular structure.

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Three intra­mol­ecular hydrogen bonds are observed in the title compound. In the crystal, mol­ecules are connected by C—H⋯Cl and N—H⋯O hydrogen bonds.

addenda and errata


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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