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  1. No Access

    Article

    Lanthanide Complexes of Related Click Tripodal 1,2,3-Triazole-Containing Ligands on the Ph3P(O) Platform. The N2 and N3 Coordination of Triazole Fragments

    The coordination and extraction properties of two related tripodal ligands differed by types of addition of the triazole fragment and linker length in the {2-[(4-Ph-1,2,3-triazol-1-yl)CH2CH2O]C6H4}3P(O) (L1) and ...

    A. G. Matveeva, M. P. Pasechnik, R. R. Aysin… in Russian Journal of Coordination Chemistry (2024)

  2. No Access

    Article

    Neodymium Complex with a Scorpionate Phosphoryl Pyridyl Ligand: Structure in Crystal and in Solution

    The coordination properties of the scorpionate ligand 2-PyCH[P(O)Ph2]2 were studied using complexation with neodymium nitrate as an example. The molecular structure of the [Nd{(2-PyCH[P(O)Ph2]2}(NO3)3(H2O)] compl...

    A. G. Matveeva, M. P. Pasechnik, A. V. Vologzhanina… in Russian Journal of General Chemistry (2023)

  3. No Access

    Article

    Methodology of Intensive Energy Saving in Ferrous Metallurgy. Experience and Results of Use

    Intensive energy saving and technological progress are very relevant for such an area as ferrous metallurgy. Based on many years of research and a systematic approach, the paper summarizes and further develops...

    S. V. Kartavtsev, E. G. Neshporenko, S. V. Matveev in Steel in Translation (2023)

  4. No Access

    Article

    Synthesis and Extraction Properties of Tripodal Tetraphosphoryl Ligands on the Triphenylphosphine Oxide Platform

    New tetraphosphoryl tripodal ligands on the triphenylphosphine oxide platform [2-Ph2P(O)(CH2)nOC6H4]3PO with different linker length (n = 3, 4) were synthesized. Their composition and structure were determined by...

    T. V. Baulina, I. Yu. Kudryavtsev, M. P. Pasechnik… in Russian Journal of General Chemistry (2023)

  5. No Access

    Article

    Production of Filler Rod for Repair Welding of ZK51 (ML12) Magnesium Alloy Castings

    In magnesium alloys castings, the casting defects such as shrinkage porosity often occur. Such defects can be suppressed by repair welding or surfacing using a special filler rod. Unfortunately, in Russia, a l...

    A. V. Koltygin, V. E. Bazhenov… in Russian Journal of Non-Ferrous Metals (2022)

  6. No Access

    Article

    Tripodal 1,2,3-Triazole Ligands Based on Triphenylphosphine Oxide. Coordination and Extraction Properties

    New tripodal 1,2,3-triazole ligands based on triphenylphosphine oxide platform with different linker lengths have been synthesized, and their structure has been determined by elemental analysis, 1H, 13C, and 31P ...

    A. G. Matveeva, T. V. Baulina, I. Yu. Kudryavtsev… in Russian Journal of General Chemistry (2020)

  7. No Access

    Article

    New Tetrazole Tripodal Ligand Based on Triphenylphosphine Oxide

    A new tetrazole tripodal ligand, tris[2-(tetrazol-5-ylmethoxy)phenyl]phosphine oxide, has been obtained. Its structure in crystal and solutions has been elucidated by X-ray diffraction analysis as well as IR, ...

    O. V. Bykhovskaya, A. G. Matveeva, M. P. Pasechnik… in Russian Journal of General Chemistry (2019)

  8. No Access

    Article

    Classification of Links of Small Complexity in the Thickened Torus

    We present a complete table of links in the thickened torus T2 × I of complexity at most 4. The table is constructed by the following method. First, we enumerate all abstract quadrivalent graphs with at most four...

    A. A. Akimova, S. V. Matveev, V. V. Tarkaev in Proceedings of the Steklov Institute of Ma… (2018)

  9. No Access

    Article

    The First 1-Hydroxypropylidenebisphosphonic Acid with 1,8-Naphthyridinone Substituent: Synthesis and Structure

    1-Hydroxy-3-(5,7-dimethyl-2-oxo-1,2-dihydro-1,8-naphthyridin-1-yl)propylidenebisphosphonic acid has been synthesized. The structure of the acid and its precursors synthesized for the first time, 3-(5,7-dimethy...

    G. V. Bodrin, M. P. Pasechnik, A. G. Matveeva… in Russian Journal of General Chemistry (2018)

  10. No Access

    Article

    Extraction of REE(III), U(VI), and Th(IV) from HNO3 and HClO4 solutions with (α-pyridyl)tetraphenylmethylenediphosphine N,P,P'-trioxide

    Extraction of microamounts of U(VI), Th(IV), and REE(III) from HNO3 and HClO4 solutions with solutions of (α-pyridyl)tetraphenylmethylenediphosphine N,P,P'-trioxide in dichloroethane was studied. The stoichiometr...

    A. N. Turanov, V. K. Kadandashev, A. G. Matveeva, G. V. Bodrin… in Radiochemistry (2017)

  11. No Access

    Article

    Tabulating knots in the thickened Klein bottle

    We tabulate all knots in the oriented thickened Klein bottle having diagrams with three crossings and less. For proving that the knots are distinct, we use a generalization of the Kauffman bracket polynomial i...

    S. V. Matveev, L. R. Nabeeva in Siberian Mathematical Journal (2016)

  12. No Access

    Article

    Ivan Ivanovich Eremin

    V. I. Berdyshev, V. V. Vasin, S. V. Matveev… in Proceedings of the Steklov Institute of Ma… (2015)

  13. No Access

    Article

    Dijkgraaf-Witten invariants over ℤ2 for 3-manifolds

    S. V. Matveev, V. G. Turaev in Doklady Mathematics (2015)

  14. No Access

    Article

    Classification of Knots of Small Complexity in Thickened Tori

    We present a table of knots in a thickened torus T × I the diagrams of which have less than five crossing points. The knots are constructed by a three-step process: enumeration of regular graphs of degree 4, e...

    A. A. Akimova, S. V. Matveev in Journal of Mathematical Sciences (2014)

  15. No Access

    Article

    The structure of 3-manifolds of complexity zero

    S. V. Matveev, D. O. Nikolaev in Doklady Mathematics (2014)

  16. No Access

    Article

    Synthesis and coordination properties of new preorganized ligand on the triphenylphosphine oxide platform

    Tris(2-cyanomethoxyphenyl)phosphine oxide was synthesized by the reaction of tris-(2-hydroxyphenyl)phosphine oxide with chloroacetonitrile. Its coordination properties were studied for the complexation with ne...

    I. Yu. Kudryavtsev, T. V. Baulina, M. P. Pasechnik… in Russian Chemical Bulletin (2013)

  17. No Access

    Article

    β-Diphenylphosphorylated alkanones and related compounds: synthesis and structure

    The reactions of diphenyl(diisopropyl)chlorophosphine with arylidene(heteroarylidene)-acetones and 3-benzylidenepentane-2,4-dione in the presence of acetic acid proceed at a high rate at room temperature to af...

    E. I. Goryunov, G. V. Bodrin, I. B. Goryunova… in Russian Chemical Bulletin (2013)

  18. No Access

    Article

    On the 75th birthday of Academician of the Russian Academy of Sciences Yurii Sergeevich Osipov

    N. N. Krasovskii, I. I. Eremin, A. M. Il’in… in Proceedings of the Steklov Institute of Ma… (2012)

  19. No Access

    Article

    Complexes of (2-methyl-4-oxopent-2-yl)diphenylphosphine oxide with uranyl and neodymium nitrates: synthesis and structures in the solid state and in solution

    The reactions of (2-methyl-4-oxopent-2-yl)diphenylphosphine oxide (L) with uranyl and neodymium nitrates afforded complexes with compositions M: L = 1: 2 and 1: 3. These complexes were characterized by X-ray d...

    A. G. Matveeva, M. S. Grigoriev, T. K. Dvoryanchikova… in Russian Chemical Bulletin (2012)

  20. No Access

    Article

    Reduction of knots in thickened surfaces and virtual knots

    F. G. Korablev, S. V. Matveev in Doklady Mathematics (2011)

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