Wyniki wyszukiwania dla: anomeric effect

• Structural and spectroscopic analysis of a new family of monomeric diphosphinoboranes

  Publikacja

  • A. Ordyszewska
  • N. Szynkiewicz
  • E. Perzanowski
  • J. Chojnacki
  • A. Wiśniewska
  • R. Grubba

  - DALTON TRANSACTIONS - Rok 2019

  We present a series of amino- and aryl(diphosphino)boranes R2PB(R’’)PR’2, where R2P, R’2P = tBu2P, tBuPhP, Ph2P, Cy2P, and R’’ = iPr2N, Ph, which were obtained via the metathesis reaction of iPr2NBBr2 or PhBBr2 with selected lithium phosphides. The structures of isolated diphosphinoboranes were characterized in the solid state and in solution by means of X-ray diffraction and NMR spectroscopy, respectively. The utility of these...

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• A study of a reduction of a micro- and nanometric bismuth oxide in hydrogen atmosphere

  Publikacja

  • B. J. Trawiński
  • B. Bochentyn
  • B. Kusz

  - THERMOCHIMICA ACTA - Rok 2018

  A reduction of bismuth oxide in hydrogen atmosphere was investigated. The reaction was performed with a material in various structural forms: powder: with micrometric grains, powder with nanometric grains and powder pressed into pellets. The process was performed in both isothermal and non-isothermal conditions. An activation energy of the reaction calculated with Friedman method was found to be about 85 kJ/mol for the reduction...

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• Perfect Beat

  Czasopisma

  ISSN: 1038-2909 , eISSN: 1836-0343

• Small isomeric push–pull chromophores based on thienothiophenes with tunable optical (non)linearities

  Publikacja

  • J. Podlesný
  • O. Pytela
  • M. Klikar
  • V. Jelínková
  • I. Kityk
  • K. Ozga
  • J. Jedryka
  • M. Rudysh
  • F. Bureš

  - ORGANIC & BIOMOLECULAR CHEMISTRY - Rok 2019

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• A comparison of structural and luminescence properties of lead(II) coordination polymers with isomeric thiophenecarboxylate ligands

  Publikacja

  • M. Kowalik
  • J. Masternak
  • K. Kazimierczuk
  • B. Kupcewicz
  • O. Khavryuchenko
  • B. Barszcz

  - INORGANICA CHIMICA ACTA - Rok 2018

  Two new lead(II) coordination polymers with isomeric thiophenecarboxylates, namely [Pb(2tpCOO)2]n (1) and [Pb(3tpCOO)2(H2O)]n (2) (2tpCOO− = thiophene-2-carboxylate, 3tpCOO− = thiophene-3-carboxylate), were synthesized and characterized. Single crystal X-ray crystallography revealed a distorted pentagonal pyramidal geometry {PbO6} around Pb in 1 and a distorted dodecahedral geometry {PbO8} in 2. The distortion derived from the...

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• Monomeric Triphosphinoboranes: Intramolecular Lewis Acid–Base Interactions between Boron and Phosphorus Atoms

  Publikacja

  • A. Ordyszewska
  • N. Szynkiewicz
  • J. Chojnacki
  • R. Grubba

  - INORGANIC CHEMISTRY - Rok 2022

  Herein, we present the synthesis of the first fully characterized monomeric triphosphinoboranes. The simple reaction of boron tribromide with three equivalents of bulky lithium phosphide tBu2PLi yielded triphosphinoborane (tBu2P)3B. Triphosphinoboranes with diversified phosphanyl substituents were obtained via a two-step reaction, in which isolable bromodiphosphinoborane (tBu2P)2BBr is first formed and then reacts with one equivalent...

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• Effect of elliptical defect orientation on the durability of specimens subjected to cyclic bending

  Publikacja

  • Z. Marciniak
  • R. Branco
  • R. F. Martins
  • D. Rozumek
  • W. Macek

  - Procedia Structural Integrity - Rok 2022

  This work presents the effect of elliptical defects orientation on the durability of specimens made of C45 steel. Three kinds of specimens with elliptical defects in the form of a one-sided notch oriented at different angles 45, 60, and 90 degrees were subjected to cyclic bending (R=-1). The stress state analysis was performed using local and non-local methods to determine an equivalent amplitude of stress, and then the results...

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• FEM (Finite Element Method) Numeric Analyses of the Syrenka S201 Car Model

  Publikacja

  • K. Podkowski
  • Z. Barszcz
  • J. Seńko

  - Rok 2017

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• The Werther Effect, the Papageno Effect or No Effect? A Literature Review

  Publikacja

  • J. Domaradzki

  - International Journal of Environmental Research and Public Health - Rok 2021

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• RADIATION EFFECTS AND DEFECTS IN SOLIDS

  Czasopisma

  ISSN: 1042-0150 , eISSN: 1029-4953