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New magnetic materials Cu x Mn1 − x S with a metal-insulator transition / G. M. Abramova [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 3. - P. 531–536, DOI 10.1134/S106378341203002X. - Cited References: 9 . - ISSN 1063-7834

РУБ Physics + Condensed Matter
Рубрики:
Alpha-MnS
Manganese
Аннотация: This paper reports on first results of the synthesis and study of the thermal, structural, electrical, resonance, and magnetic properties of new sulfide materials Mex Mn1 – S (Me = Cu, 0 ˂ x ˂ 0.2) synthesized based on manganese monosulfide. The materials have a NaCl cubic structure at 300 K and undergo a con centration metal–insulator transition with increasing degree of substitution and with varying temperature. The magnetic transition occurs in the region of the heat capacity anomaly. The Néel temperature is slightly dependent on the copper concentration. The samples with a high copper content exhibit metallic conduction at T ˂ 260 K and semiconductor conduction at T ˃ 260 K.

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Публикация на русском языке Новые магнитные материалы CuxMn1-xS с переходом металл—диэлектрик [Текст] / Г. М. Абрамова [и др.] // Физ. тверд. тела. - 2012. - Т. 54 Вып. 3. - С. 500-504

Доп.точки доступа:
Abramova, G. M.; Абрамова, Галина Михайловна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Sokolov, V. V.; Соколов В. В.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Bovina, A. F.; Бовина, Ася Федоровна; Amirov, A. A.; Aliev, A. M.; Khanov, L. N.; Patrin, G. S.; Патрин, Геннадий Семёнович
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    Crystal structure and magnetic properties of Mn substituted ludwigite Co3O2BO3 / Yu. V. Knyazev [et al.] // J. Magn. Magn. Mater. - 2012. - Vol. 324, Is. 6. - P. 923-927, DOI 10.1016/j.jmmm.2011.07.044. - Cited References: 15. - The study was supported by the Russian Foundation for Basic Research (Project no. 09-02-00171-a), the Federal Agency for Science and Innovation (Rosnauka) (Project no. MK-5632.2010.2), the Physical Division of the Russian Academy of Science, the program "Strongly Correlated Electrons", Project 2.3.1. . - ISSN 0304-8853
   Перевод заглавия: Кристаллическая структура и магнитные свойства Mn-замещенного людвигита Co3O2BO3

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
BOND VALENT SUMS
   COORDINATION CHEMISTRY
   OXIDATION -STATE
   O BONDS
   COMPLEXES
   MANGANESE
   COBALT
Кл.слова (ненормированные):
Transition metal oxyborate -- Distinct crystallographic position -- Spin glass magnetic ordering
Аннотация: The needle shape single crystals Co3−x MnxO2BO3 with ludwigite structure have been prepared. According to the X-ray diffraction data the preferable character of distinct crystallographic positions occupation by Mn ions is established. Magnetization field and temperature dependencies are measured. Paramagnetic Curie temperature value Θ=−100 K points out the predominance of antiferromagnetic interactions. Spin-glass magnetic ordering takes the onset at TN=41 K. The crystallographic and magnetic properties of Co3O2BO3:Mn are compared with the same for the isostructural analogs Co3O2BO3 and CoO2BO3:Fe.

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Доп.точки доступа:
Knyazev, Yu.V.; Князев, Юрий Владимирович; Ivanova, N. B.; Иванова, Наталья Борисовна; Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Yurkin, G. Yu.; Юркин, Глеб Юрьевич
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Chemistry of vinylidene complexes. XX. Intramolecular carbonylation of vinylidene on the MnFe center: Spectroscopic and structural study. X-ray structure of the new trimethylenemethane type MnFe complex / A. B. Antonova [et al.] // J. Organomet. Chem. - 2011. - Vol. 696, Is. 4. - P. 963-970, DOI 10.1016/j.jorganchem.2010.10.035. - Cited References: 52. - This work was partially supported by the Presidium of the Russian Academy of Sciences (Program for Basic Research, Project No. 7.18) and Russian Foundation for Basic Research (Grant No. 09-03-90745-mob_st). Authors are grateful to Prof. N.A. Ustynyuk for useful discussions, Dr. E.A. Shor and Dr. A.M. Shor for giving the data of quantum chemical study. . - ISSN 0022-328X

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Organic
Рубрики:
MOLECULAR-STRUCTURE
   ORGANOMETALLIC CHEMISTRY
   TRICARBONYL COMPLEXES
   UNSATURATED CARBENES
   METAL VINYLIDENES
   TRANSITION-METALS
   ORGANIC-SYNTHESIS
   CRYSTAL-STRUCTURE
   IRON TRICARBONYL
   MANGANESE
Кл.слова (ненормированные):
Manganese -- Iron -- Carbonyl complexes -- Heteronuclear vinylidene complexes -- Intramolecular vinylidene carbonylation -- Trimethylenemethane complexes
Аннотация: Reactions of Fe-2(CO)(9) with Cp(CO)(2)Mn=C=CHPh (1) and Cp(CO)(PPh3)Mn=C=CHPh (3) gave the heterometallic trimethylenemethane complexes eta(4)-{C[Mn(CO)(2)Cp](CO)CHPh}Fe(CO)(3) (2) and eta(4)-{C[Mn(CO)(PPh3)Cp](CO)CHPh}Fe(CO)(3) (4), respectively. The formation of the benzylideneketene [PhHC=C=C=O] fragment included in complexes 2 and 4 occurs via intramolecular coupling of the carbonyl and vinylidene ligands. The structures of 3 and 4 were determined by single crystal XRD methods. The influence of the nature of the L ligands at the Mn atom on the structural and spectroscopic characteristics of eta(4)-{C[Mn(CO)(L)Cp](CO)CHPh}Fe(CO)(3) (L = CO (2), PPh3 (4)) is considered. According to the VT H-1 and C-13 NMR spectra, complex 2 reversibly transforms in solution into mu-eta(1):eta(1)-vinylidene isomer Cp(CO)(2)MnFe(mu-C=CHPh)(CO)(4) (2a), whereas complex 4 containing the PPh3 ligand is not able to a similar transformation. (C) 2010 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660049, Russia
Russian Acad Sci, Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Moscow 119991, Russia

Доп.точки доступа:
Antonova, A. B.; Chudin, O. S.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Rubaylo, A. I.; Verpekin, V. V.; Sokolenko, W. A.; Pavlenko, N. I.; Semeikin, O. V.
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Chemistry of vinylidene complexes. XXIII. Binuclear rhenium-palladium vinylidene bridged complexes, their reactions with diiron nonacarbonyl / V. V. Verpekin [et al.] // J. Organomet. Chem. - 2014. - Vol. 770. - P. 42-50, DOI 10.1016/j.jorganchem.2014.07.024. - Cited References: 56. - This article is dedicated to the memory of Alla B. Antonova. . - ISSN 0022-328X. - ISSN 1872-8561

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Organic
Рубрики:
TRANSITION-METAL-COMPLEXES
   CATIONIC CARBYNE COMPLEXES
   RAY CRYSTAL-STRUCTURE
   MOLECULAR-STRUCTURE
   HETEROBIMETALLIC COMPLEXES
   LIGANDS
   MANGANESE
   CLUSTERS
   DINUCLEAR
   PD2CL2(MU-PH2PCH2PPH2)2
Кл.слова (ненормированные):
Rhenium -- Palladium -- Iron -- Vinylidene complexes -- Heterometallic complexes
Аннотация: The reaction of [Cp(CO)2ReCCHPh] (1) with [Pd(PPh3)4] followed by the treatment of resulting [Cp(CO)2RePd(μ-CCHPh)(PPh3)2] (2) with diphosphines (dppe, dppp) gave new complexes [Cp(CO)2RePd(μ-CCHPh)(dppe)] (3) and [Cp(CO)2RePd(μ-CCHPh)(dppp)] (4). Treatment of the synthesized complexes with [Fe2(CO)9] led to mixtures of [Cp(CO)2ReFe(μ-CCHPh)(CO)4] (5), [(dppe)PdFe2(CO)8] (6), [CpReFe2(μ3-CCHPh)(CO)8] (7), [CpReFePd(μ3-CCHPh)(CO)5(dppe)] (8) and of 5, [(dppp)PdFe2(CO)8] (9), [CpReFePd(μ3-CCHPh)(CO)5(dppp)] (10), respectively. The main products of both reactions were trinuclear μ3-vinylidene clusters 8 and 10. Reactions of the trinuclear μ3-vinylidene ReFePd clusters 8 and 10 with Fe2(CO)9 were also studied. New complexes were characterized by IR, 1H, 13C, 31P NMR spectroscopy and cyclic voltammetry. The structure of [CpReFe2(μ3-CCHPh)(CO)8] was determined by single-crystal X-ray diffraction.

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Держатели документа:
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
RAS, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Verpekin, V. V.; Верпекин В. В.; Kondrasenko, A. A.; Кондрасенко, Александр Александрович; Chudin, O. S.; Чудин О. С.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Burmakina, G. V.; Бурмакина Г. В.; Pavlenko, N. I.; Павленко, Нина Ивановна; Rubaylo, A. I.; Рубайло, Анатолий Иосифович
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