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Co(NO3)2 as an inverted umbrella-type chiral noncoplanar ferrimagnet
Physical Review B: Condensed Matter and Materials Physics. 2020. Vol. 102. No. 9. P. 0.
Danilovich I. L., Deeva E. B., Bukhteev K. Y., Vorobyova A., Morozov I., Volkova O., Zvereva E. A., Maximova O. V., Solovyev I. V., Nikolaev S. A., Phuyal D., Abdel-Hafiez M., Wang Y. C., Lin J., Chen J. M., Gorbunov D. I., Puzniak K., Lake B., Vasiliev A.
The low-dimensional magnetic systems tend to reveal exotic spin-liquid ground states or form peculiar types of long-range order. Among systems of vivid interest are those characterized by the triangular motif in two dimensions. The realization of either ordered or disordered ground state in triangular, honeycomb, or kagome lattices is dictated by the competition of exchange interactions, also being sensitive to anisotropy and the spin value of magnetic ions. While the low-spin Heisenberg systems may arrive to a spin-liquid long-range entangled quantum state with emergent gauge structures, the high-spin Ising systems may establish the rigid noncollinear structures. Here, we present the case of chiral noncoplanar inverted umbrella-type ferrimagnet formed in cobalt nitrate Co(NO3 )2 below TC = 3 K with the comparable spin and orbital contributions to the total magnetic moment
Keywords: crystal structure
Kuzmin A. V., Flakina A., Nazarov D. et al., Crystal Growth & Design 2025 Vol. 25 P. 6332 –6344
Oxidation of tetraselenatetracene (TSeT) and bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) by p-chloranil in the presence of metal hexafluoroacetylacetonates: MnII(hfac)₂, CoII(hfac)₂ and PrIII(hfac)₃ followed by precipitation of crystals by n-hexane produces (TSeT₁.₅)⁺{MnII(hfac)₃⁻} (1), (TSeT₁.₅)⁺{PrIII(hfac)₄⁻} (3), (TSeT₂)⁺{CoII(hfac)₂Cl⁻} (4), and (ET₃)⁺{MnII(hfac)₃⁻} (5). Thioindigo dye is introduced into (TSeT₁.₅)⁺(Thioindigo₁.₅){MnII(hfac)₃⁻} (2) due to the appearance of specific C=O···(Se−Se bond) interactions accompanied by the ...
Added: May 6, 2026
Kalle P., Bezzubov S., Vener M. et al., Crystal Growth & Design 2025 Vol. 25 No. 20 P. 8658–8664
Sodium acetate (NaOAc), a simple and widely used compound, has been studied structurally in several works; still, uncertainties concerning its polymorphism remain. In the present study, the crystallization conditions of the known polymorphs of anhydrous NaOAc were clarified, whereas their crystal structures were corrected. Two new polymorphs were discovered, one of which (NaOAc II) crystallizes ...
Added: October 15, 2025
Flakina A., Nazarov D., Faraonov M. et al., International Journal of Molecular Sciences 2024 Т. 25 № 25 С. 8068
The oxidation of tetraselenatetracene (TSeT) by tetracyanoquinodimethane in the presence of dysprosium(III) tris(hexafluoroacetylacetonate), DyIII(hfac)3, produces black crystals of {TSeT1.5}●+[DyIII(hfac)4]− (1) salt, which combines conducting and magnetic sublattices. It contains one-dimensional stacks composed of partially oxidized TSeT molecules (formal averaged charge is +2/3). Dimers and monomers can be outlined within these stacks with charge and spin ...
Added: April 30, 2025
Deltsov I., Ivan V. Ananyev, Meerov D. et al., Journal of Organic Chemistry 2023 Vol. 89 No. 1 P. 174–182
A majority of known and newly synthesized energetic materials comprise polynitrogen or nitrogen–oxygen heterocycles with various explosophores. However, available structural combinations of these organic scaffolds are finite and are about to reach their limits. Herein, we present the design and synthesis of a series of sulfur-containing polyazole structures comprising 1,3,4-thiadiazole and furazan rings linked by ...
Added: June 24, 2024
Vorobyova A., Shilov A. I., Boltalin A. I. et al., Mendeleev Communications 2021 Vol. 31 No. 3 P. 356–358
A new protic ionic liquid (Tс = 14±1 °C) – pyridinium hydrogen dinitrate – was obtained at room temperature from a solution of pyridinium nitrate in anhydrous nitric acid in a desiccator over P2O5. Single crystal X-ray diffraction study revealed that the solid state structure of [(PyH)2(NO3)][H2(NO3)3] consists of hydrogen bonded cations [(PyH)2(NO3)]+ and anions ...
Added: June 5, 2024
Petr A. Buikin, Ivan S. Lunkov, Ilyukhin A. et al., Polyhedron 2024 Vol. 264 Article 117223
Solid solutions of 4-methylpyridinium bromoiodobismuthates have been isolated from aqueous solutions and structurally characterized. It was found that the composition of the resulting solid solutions [PiH]4Bi2X10, [PiH]BiX4 и [PiH]3Bi2X9 (PiH = 4-methylpyridinium; X = Br, I) depends on the ratio of organic cation/bismuth and bromine/iodine in the initial solution. The existence of two polymorphic modifications ...
Added: May 24, 2024
Buikin P., Zhavoronkov A. S., Ilyukhin A. B. et al., Russian Journal of Inorganic Chemistry 2024 Vol. 69 No. 2 P. 172–177
Solid solutions of pyridinium bromo-iodobismutates were isolated from aqueous solutions and structurally characterized. The composition of the resulting solid solutions [HPy]BiX4 and [HPy]3Bi2X9 (X = Br, I) was found to depend on the ratios of pyridinium/bismuth and bromine/iodine in the initial solution. The existence of five polymorphic modifications in the system for [HPy]BiX4 compounds was ...
Added: May 24, 2024
Ekaterina M. Dudko, Petr A. Buikin, Ilyukhin A. et al., CrystEngComm 2024 Vol. 26 P. 3490–3500
Eight new solvates of 1,1'-(1,4-phenylenebis(methylene))bis(1-pyridinium)) hybrid halobismuthates were obtained from the dimethyl sulfoxide (DMSO) and dimethylformamide (DMF) solutions and structurally characterized. The thermal stability of the solvates was studied using TGA/DSC methods and the appropriate conditions for the solvent molecules loss were defined. As a result, five new hybrid halobismuthates were prepared by the thermal ...
Added: May 24, 2024
Guzelia I. Sadrtdinova, Daniil A. Bardonov, Konstantin A. Lyssenko et al., Mendeleev Communications 2023 Vol. 33 No. 3 P. 357–359
Mononuclear [CpNd(BH4)2L] borohydrides comprising
L = 1,3,5-trimethyl-1,3,5-triazacyclohexane (Me3tach) and
L = 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3tacn) were
obtained and structurally characterized. Their catalytic
activity in coordination–insertion ring-opening polymerization
of e-caprolactone was studied. ...
Added: January 18, 2024
Makhaneva A. Y., Zakharova E., Nesterenko S. et al., Journal of Solid State Chemistry 2023 Vol. 322 Article 123969
Mixed calcium-platinum phosphide CaPt4P6 was synthesized using flux-assisted high-temperature ampoule
technique. According to single-crystal XRD data it crystallizes in the monoclinic space group C2/c with Z ¼ 4 (a ¼
8.1361(3) Å, b ¼ 7.9489(3) Å, c ¼ 11.3803(5) Å, β ¼ 90.860(2)o, R1 ¼ 0.0240, wR2 ¼ 0.0618) and belongs to the
BaPt4As6 structure type, the structure ...
Added: October 23, 2023
Berseneva D. A., Shpakovsky D. B., Nikitin E. A. et al., Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya 2023 Vol. 49 No. 9 P. 622–630
New complexes I–IV of di-tert-butyltin with ligands based on heterocyclic thioamides (2-mercaptobenzoxazole, 2-mercaptobenzothiazole, 2-mercaptobenzimidazole) and 2,6-di-tert-butyl-4-mercaptophenol are synthesized and studied by X-ray diffraction (XRD). The XRD results for single crystals of I, II, and IV are presented (CIF files CCDC nos. 2251495, 2251493, and 2251494, respectively). Specific features of the synthesized crystal structures are discussed. Complexes I and II contain the expected Sn–C and Sn–S bonds ...
Added: September 20, 2023
Tararushkin E., Smirnov G., Kalinichev A. G., Minerals 2023 Vol. 13 No. 8 Article 1018
The 10-Å phase is an important member of the family of dense hydrous magnesium silicates (DHMSs) that play a major role in the water budget in the Earth’s upper mantle. Its nominal composition is usually written as Mg3Si4O10(OH)2·xH2O, and its structure is often described as layers of talc with some amount of water present in ...
Added: August 1, 2023
Makhaneva A., Zakharova E., Nesterenko S. et al., Dalton Transactions 2022 Vol. 51 No. 48 P. 18583–18592
Three quaternary phosphide platinides, Ca2Pt7AlP3.00(4), Ca2Pt7TiP3.24(4), and Ca2Pt7ZnP2.78(2), were synthesized by a high-temperature technique using lead as a flux. According to the single-crystal diffraction data, they are isotypic and crystallize in the tetragonal space group I4/mmm with Z = 2 (Ca2Pt7AlP3.00(4): a = 3.9893(6) Å, c = 26.832(5) Å; Ca2Pt7TiP3.24(4): a = 3.99610(10) Å, c = 26.9074(17) Å; Ca2Pt7ZnP2.78(2): a = 4.0020(2) Å, c = 26.5549(17) Å) and thus represent first ...
Added: January 23, 2023
Orlova E., Sorokin T., Antipin A. et al., Crystal Growth & Design 2023 Vol. 23 No. 1 P. 473–479
Cadmium-doped lanthanum and praseodymium oxymolybdates were synthesized as single crystals and polycrystalline samples. X-ray diffraction analysis confirmed that Cd cations replace rare-earth atoms in the oxymolybdate structure (sp. gr. I4̅c2), shifting from the main position to a distance of approximately 0.6 A. It is shown that in the temperature range of 20−600 °C, Cd doped ...
Added: December 5, 2022
Serovaiskii A., Kutcherov V., Vinokurov V. et al., The Journal of Physical Chemistry Letters 2022 Vol. 13 No. 43 P. 10114–10119
BiScO3 compound was obtained in the form of dense ceramic with a perovskite-type structure, and its complex characterization was determined for the first time. The corresponding synthesis procedure is described in detail. It is demonstrated that the temperature region of the phase stability at atmospheric pressure lies at T < 700 °C (973 K). It is shown that ...
Added: October 24, 2022
Andronov M., Kuzmin A. V., Shestakov A. et al., Inorganica Chimica Acta 2022 Vol. 533 Article 120789
Series of anionic salts of fullerenes C60 and C70 with different metal tetraphenylporphyrins, MIITPP, where M = Co, Mn and Zn, and N, N, N, N‘, N‘-pentamethyldiaminoethane cations (PMDAE+) has been obtained in a crystalline form. Composition of the complexes is (PMDAE+)⋅(MIITPP)(C60−)⋅XC6H4Cl2 (M = Co, X = 1.25 (1), M = Mn, X = 0.75 (2) and M = Zn, X = 0.75 (3)) and {(PMDAE+)⋅ZnIITPP}2⋅(C70−)2⋅4C6H4Cl2 ...
Added: October 22, 2022
Romanenko N., Alexey V. Kuzmin, Mikhailenko M. et al., Dalton Transactions 2022 Vol. 51 No. 25 P. 9770–9779
The reaction of MnIIPc, FeIIPc or FeIIPcCl16 with KCN in the presence of cryptand[2.2.2] yielded dicyano-complexes {cryptand(K+)}2{MII(CN)2(macrocycle2−)}2−·XC6H4Cl2 (M = Mn and Fe, X = 1 and 2) that were used for the preparation of trinuclear assemblies of the general formula {cryptand(K+)}2{MII(CN)2Pc·(ML)2}2−·nC6H4Cl2 (MII = MnII and FeII; n = 1, 4 and 5). These assemblies were ...
Added: October 22, 2022
Kramarova E. P., Negrebetskii V. V., Volodin A. D. et al., Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya 2022 Vol. 48 No. 10 P. 647–658
Abstract: A series of anionic phenylsilicon(IV) bis-catecholate complexes, where (Cat1)– = catecholate, (Cat2)– = 3,4,5,6-tetrabromocatecholate, (Cat3)– = 4-cyanocatecholate, (Cat4)– = 4-nitrocatecholate, (Cat5)– = 3-fluorocatecholate, and (Cat6)– = 4,5-dibromocatecholate, were prepared by the reaction of trimethoxyphenylsilane with two equivalents of catechol or its derivatives containing electron-withdrawing substituents in the benzene ring in the presence of dicyclohexylamine. The complexes were characterized by IR ...
Added: October 17, 2022
S. P. Balabanova, Buikin P., Ilyukhin A. B. et al., Russian Journal of Inorganic Chemistry 2022 Vol. 67 No. 7 P. 1018–1024
New hybrid 2,2'-bipyridinium halobismuthates ([bipyH]+) (I and II), 7,8-dihydro-6H-dipyrido[1,2-a:2',1'-c][1,4]diazepine-5,9-diium ([bipyC3]2+) (III), 6,7,8,9-tetrahydrodipyrido[1,2-a:2',1'-c][1,4]diazocin-5,10-diium ([bipyC4]2+) (IV), and 1,1'-(pentanediyl)bis(2,2'-bipyridinium) ((bipyH)2C5]4+) (V) have been isolated and characterized by X-ray diffraction. The structure of I contains a monoprotonated cation 2,2'-bipyridinium and the isolated [Bi2Br10]4– anion. 2,2'-Bipyridinium bromobismuthate II contains a polymeric anion and is isostructural to the previously described iodobismuthate. Bromobismuthate III includes [BiBr6]3– anions and water molecules. Iodobismuthate [bipyC3]2[Bi2I10] ...
Added: June 6, 2022
Tararushkin E., Pisarev V., Kalinichev A. G., Cement and Concrete Research 2022 Vol. 156 Article 106759
Ettringite, (Ca6[Al(OH)6]2[SO4]3·nH2O, n = 24–27), is one of the common phases of cement and plays an important role in cement chemistry as the primary cause of sulphate corrosion in Portland cement. Molecular dynamic computer simulations have already been applied earlier to model the crystal structure of ettringite and its interfaces with aqueous salt solutions. A recently developed version of the widely ...
Added: March 28, 2022
Bardonov D., Komarov P., Sadrtdinova G. et al., Inorganica Chimica Acta 2022 Vol. 529 Article 120638
A series of mono-, bis and tris(cyclopentadienyl) complexes of La, Nd and Tb with borohydride ligands were synthesized and structurally characterized. Various structural types of complex anions and cations containing cyclopentadienyl and borohydride ligands in the coordination sphere of Ln3+ have been studied by single-crystal X-ray diffraction. Five different structural types of Cp-lanthanide borohydrides were ...
Added: November 14, 2021