issue contents

ISSN: 2056-9890

November 2022 issue

Highlighted illustration

Cover illustration: 1,4,8,11-Tetraazacyclotetradecane (cyclam) is a 14-membered azamacrocycle known for its ability to form coordination compounds with transition-metal centres, and in particular with Ni2+ cations. These complexes can act as nodes for the formation of coordination polymers of different dimensionality, depending on the linkers they are combined with. The present paper describes the synthesis and crystal structure of the first one-dimensional coordination polymer based on Ni(cyclam)2+ units connected by benzene-1,3,5-tricarboxylate anions, catena-poly[[[(1,4,8,11-tetra­aza­cyclo­tetra­decane-κ4N1,N4,N8,N11)nickel(II)]-μ2-5-carb­oxy­benzene-1,3-di­carboxyl­ato-κ2O1:O3] octa­hydrate]. See: Gavrish, Shova & Lampeka [Acta Cryst. (2022). E78, 1122–1126].

research communications

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The synthesis, crystal structure, and some spectroscopic details for the phenyl­pyrazole-based insecticide N-{3-cyano-1-[2,6-di­chloro-4- (tri­fluoro­meth­yl)phen­yl]-4-(ethyl­sulfan­yl)-1H-pyrazol-5-yl}-2,2,2- tri­fluoro­acetamide (C15H8N4Cl2F6OS) are presented.

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Three hexa­hydro­quinoline derivatives were synthesized and crystallized in an effort to study the structure–activity relationships of these calcium-channel antagonists. n these hexa­hydro­quinoline derivatives, common structural features such as a flat-boat conformation of the 1,4-di­hydro­pyridine (1,4-DHP) ring, an envelope conformation of the fused cyclo­hexa­none ring, and a substituted phenyl group at the pseudo-axial position are retained. Hydrogen bonds are the main contributors to the packing of the mol­ecules in these crystals.

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In the crystal structure of the title compound, the Ni cations are octa­hedrally coordinated and linked into chains that are arranged in such a way that channels are formed in which aceto­nitrile solvate mol­ecules are embedded that can reversibly be removed.

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4,5-Dimethyl-1,3-dioxol-2-one crystallizes on a mirror plane in P21/m and forms layered sheets that comprise anti­parallel linear strands. Close O⋯H, C⋯O and C⋯C inter­molecular contacts are formed between strands and sheets.

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The title compound, a charge-neutral bis­{2-(3,4-di­methyl­phen­yl)-4H-1,2,4-triazol-3-ato)-6-(1H-πyrazol-1-yl)pyridine} iron(II) complex di­methanol solvate, is a low-spin complex with a moderately distorted pseudo­octa­hedral coordination environment of the metal ion. As a result of the cone shape, the mol­ecules are stacked in mono-periodic columns that are bound by weak hydrogen bonds into di-periodic layers, which, in turn, are arranged in a three-dimensional lattice bound by weak inter­layer inter­actions.

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The title compound crystallizes in the triclinic space group P[\overline{1}] with a monomeric [Co(3-meo-cin)(phen)2(H2O)]+ cation and a nitrate anion (3-meo-cin = 3-meth­oxy cinnamic acid) in the asymmetric unit. The CoII ion is coordinated by four N atoms from two 1,10-phenanthroline ligands and two O atoms, the first from a meth­oxy cinnamate ligand and the second from a coordinated water mol­ecule, forming a distorted octa­hedral geometry.

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In the title compound, the dihedral angle between the mean planes of the cyclo­hexane and 1,3-dithietane rings is 9.1 (3)°. A short S⋯O contact is observed in the crystal.

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The coordination polyhedra of the complex cations in the one-dimensional coordination polymers I and II represent tetra­gonally distorted NiN4O2 octa­hedra with the four N atoms of the aza­macrocyclic cyclam ligand in the equatorial planes and two O atoms of the benzene­tri­carboxyl­ate anions in the axial positions. The crystals of both compounds are composed of parallel coordination polymeric chains running along the [010] direction in I and the [110] and [1[\overline{1}]0] directions in II. As a result of hydrogen-bonding inter­actions, the chains are joined together in layers oriented parallel to the (10[\overline{1}]) and (001) planes in I and II, respectively.

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The synthesis, crystal structure, and some spectroscopic details for 2-chloro-1-(3-hy­droxy­phen­yl) ethanone, C8H7O2Cl, an α-haloketone of use in organic synthesis, are described.

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Coordination bonds of the SO42– anions associate the copper(II) cations into polymeric chains running parallel to the c axis.

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The crystal structure of the cubic double-perovskite Sr2Cr0.82Ni0.11Os1.07O6 at 113 K is reported. The refined structure shows that this cubic form is stable at 113 K.

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The title charge-neutral complex is a low-spin complex with a moderately distorted pseudo-octa­hedral coordination environment of the metal ion. As a result of their asymmetric shape, the mol­ecules stack into chains, which eventually pack into layers and, finally, into a three-dimensional network connected by weak C—H⋯N, C—H⋯C hydrogen bonds and C—H⋯π inter­actions.

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.


Emerging Sources Citation Index

Acta E is included in the Emerging Sources Citation Index.


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