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Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

November 2023 issue

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Cover illustration: High levels of greenhouse gas emissions, in particular carbon dioxide, are considered the primary source of the global warming that our planet is experiencing. Among several strategies being explored for the mitigation and control of these emissions are processes that separate, capture and store CO2 through the so-called carbon capture and sequestration materials (CCS). The stored gases can then be used in reactions leading to materials useful in other different processes such as the synthesis of catalysts or pharmaceutical compounds. This article presents the structure of a novel Cu-carbamato complex, bis­[N-(5-methyl-1H-pyrazol-3-yl-κN2)carbamato-κO]copper(II) tetra­hydrate, obtained in a reaction driven by absorption of CO2 present in the environment. See Sirenko, Kuzevanova, Vynohradov, Naumova & Shova [Acta Cryst. (2023). E78, 988–992].

research communications


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The crystal structure of the title compound consists of dinuclear complexes, in which the CoII cations are fivefold coordinated and linked by centrosymmetric pairs of μ-1,1(O,O)-bridging 2-methyl­pyridine N-oxide coligands.

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The structure of the title compound is composed of rare Z-shaped octa­bromide anions embedded within N-methyl­nicotinic acid cations.

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The mol­ecular and crystal structure of (E)-2-[(benzo[d]thia­zol-2-yl­imino)­meth­yl]-5-(di­ethyl­amino)­phenol and its reaction product with tri­phenyl­borane are described. In compound Et2N-Bz, one of the ethyl groups and the benzo­thia­zole ring are disordered over two sets of atomic sites with major occupancy components of 0.822 (5) and 0.843 (2), respectively.

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A mononuclear square-planar CuII complex was synthesized by reacting 5-methyl-3-pyrazolamine and copper(II) acetate in water under ambient conditions. Di­ethano­lamine was added to facilitate carbon dioxide adsorption, creating an alkaline environment. Structural analysis revealed that the complex crystallizes in the P21/c space group of the monoclinic crystal system, with the central copper(II) atom in a square-planar coordination environment N2O2. Co-crystallized water mol­ecules are present, forming O—H⋯O hydrogen bonds with the CuII mononuclear complex. Hirshfeld surface analysis highlighted the importance of various inter­actions, including H⋯O/O⋯H, H⋯C/C⋯H, and H⋯N/N⋯H, in providing crystal structure packing.

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The synthesis, crystal structure and Hirshfeld surface analysis of a new PdII cinnamaldehyde 4-thio­semicarbazone homoleptic complex is reported. As a result of H⋯S intra­molecular inter­actions, graph-set motif S(5), the coordination sphere resembles a hydrogen-bonded macrocyclic environment-type. In the crystal, the mol­ecules are linked by H⋯S inter­actions, with graph-set motifs [R_{2}^{2}](8), forming a mono-periodic hydrogen-bonded polymer along [001].

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2-[(4-Acetyl­phen­yl)carbamo­yl]phenyl acetate, a derivative of aspirin, has been structurally characterized revealing a structure based on inter­molecular N—H⋯O hydrogen bonds and π–π inter­actions.

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The title salt consists of three components, comprising one di­benzyl­ammonium cation, [(C6H5CH2)2NH2]+, one hydrogen (4-amino­phen­yl)arsonate anion, [H2NC6H4As(OH)O2], and one mol­ecule of water. In the crystal, these components are organized in infinite zigzag chains via inter­molecular hydrogen bonds. Weak inter­actions between the chains lead to a three-dimensional network.

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Cs2GdNb6Cl15O3 is an octa­hedral Nb-cluster compound containing three inner ligands of oxygen atoms. Individual Nb6 clusters are linked to each other via GdIII and CsI atoms, which exhibit a coordination number of 9 (three O and six Cl ligands) and 12 (twelve Cl ligands).

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A modification of a B—Cl 1,2–aza­borinine precursor with anthracenyl lithium generates an air-stable analog of cyclo­hexa­diene. In the crystal packing, van der Waals inter­actions are dominant.

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The structures of five gold complexes involving piperidine or pyrrolidine, either as neutral ligands or protonated counter-cations, are presented.

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In the crystal structure of the title compound, the copper(I) cations are tetra­hededrally coordinated and linked by pairs of bromide anions into dinuclear units that are further connected into layers by the 1,2-bis­(pyridin-4-yl)ethene (4-bpe) coligands. The layers are stacked so that cavities are formed in which disordered 4-bpe mol­ecules are embedded.

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The pendant dodecyl chain in the title compound adopts an all-trans conformation apart from the gauche terminal C—C—C—Br moiety.

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In the title compound, the thia­zine ring exhibits a screw-boat conformation. In the crystal, corrugated layers of mol­ecules parallel to the ab plane are formed by N—H⋯O and C—H⋯O hydrogen bonds together with C—H⋯π(ring) and S=O⋯π(ring) inter­actions. The layers are connected by additional C—H⋯O hydrogen bonds and π-stacking inter­actions.

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The crystal structure and supra­molecular features are reported of a dimeric bis-urea-functionalized pillar[5]arene macrocycle, which functions as a receptor system to the DMF guest mol­ecule.

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In the title coordination compound, the Cd atom is octa­hedrally coordinated by two N,N′-bidentate ligands [4-(2-amino­eth­yl)morpholine] and two trans-located acetate mol­ecules. The Cd atom is located on a centre of inversion, whereas the morpholine and four water mol­ecules are adjacent to the acetate moieties. In the crystal, neighboring metal complexes and uncoordinated water mol­ecules are linked via N—H⋯O and O—H⋯O hydrogen-bonding inter­actions.

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The crystal structure of a dinuclear oxidovanadium(IV/V) complex [V2O2(μ-O)(μ-H(SO4)2)(4,4′-tBubpy)2] aceto­nitrile monosolvate has been determined.

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The title compound was obtained as a result of a template reaction between oxalohydrazide, formaldehyde and iron(III) chloride in the presence of atmospheric O2. The complex anion of the title compound reveals clathrochelate topology and includes an FeIV metal centre. In the crystal, the complex anions are connected through two Li cations into dimers, which are connected by Li—O bonds, forming infinite chains along the b-axis direction.

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The NH-deprotonation of a 10-aza-9-borabenzo[h]quinoline yields a bidentate ligand that was used for the synthesis of a 2:1 coordination complex with zinc. Its crystal packing is dominated by intense intra- and inter­molecular π–π stacking inter­actions.

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In the crystal structures of the formamide monosolvate (1a) and the n-propanol/water solvate/hydrate (1b), the host mol­ecules adopt similar geometries with an alternating arrangement of the substituents above and below the plane of the central arene ring.

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The structural parameters of yttrium chromium tetra­boride YCrB4 were refined based on single-crystal X-ray diffraction data. The present study successfully refined all the positional and atomic displacement parameters of the Y, Cr, and B atoms.

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The structure of 4-(naphthalen-2-yl)-2-oxo-6-phenyl-1,2-di­hydro­pyridine-3-carbo­nitrile, prepared by a three-component one-pot reaction, is based on dimers connected by N—H⋯O hydrogen bonds, which also inter­act through π–π contacts.

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At 106 (2) K, the title mol­ecule has monoclinic P21/c symmetry with four mol­ecules in the unit cell. The imidazole ring is rotated 80.7 (1)° relative to the phenyl ring. Inter­molecular stabilization primarily results from close contacts between the N-atom at the 3-position on the imidazole ring and the C—H bond at the 4-position on the neighboring DippIm.

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In the title salt, [Ni(C6H8N2)2(H2O)2]·(C10H6O6S2), the NiII atom exhibits a slightly tetra­gonally distorted {O2N4} octa­hedral coordination environment, with two pairs of equatorial Ni—N bonds and a pair of longer axial Ni—O bonds.

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The structure of a 2-methyl-1H-imidazol-3-ium trimesate compound was determined by single-crystal X-ray diffraction. The compound is composed of protonated 2-methyl­imidazole and singly deprotonated trimesic acid mol­ecules.

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Two complexes, 1 and 2, based on Fe(NCS)2 and 3-cyano­pyridine as coligand were synthesized, structurally characterized and investigated for their thermal behavior. In both compounds the FeII cations are octa­hedrally coordinated by two N-bonded thio­cyanate anions in trans-position as well as four 3-cyano­pyridine coligands for compound 1 and two 3-cyano­pyridine ligands and two water mol­ecules for compound 2. Upon heating, both complexes transform into an inter­mediate with bridging anionic ligands that is isotypic to its Cd(NCS)2 and Mn(NCS)2 analogs.

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The title mol­ecular coordination compound exhibits a central CuII atom with a distorted octa­hedral [N4O2] coordination environment. The axial positions are occupied by two O atoms from nitrate anions and equatorial positions occupied by pyridine-like N atoms from four 3-amino­pyrazole ligands.

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The title compound, alternatively known as benzodi­aza­borole trimer, C18H15B3N6·2C3H6O, at 100 K crystallizes in the triclinic system, space group P[\overline{1}]. The structure displays N—H⋯O hydrogen bonding connecting the main mol­ecule with the crystallization solvent.

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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