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Radiochemistry

, Volume 52, Issue 2, pp 145–151 | Cite as

Crystal and molecular structures of tricarbonyltechnetium acetylacetonate and its adduct with diethylamine

  • G. V. Sidorenko
  • M. S. Grigor’ev
  • V. V. Gurzhiy
  • S. V. Krivovichev
  • A. E. Miroslavov
  • D. N. Suglobov
Article

Abstract

The crystal and molecular structures of tricarbonyltechnetium acetylacetonate and its adduct with diethylamine were studied by single crystal X-ray diffraction. Tricarbonyltechnetium acetylacetonate crystallizes in the triclinic system, space group \( P\bar 1 \), a = 8.1154(1), b = 8.1961(2), c = 8.2695(1) Å, α = 64.5618(9)°, β = 69.7899(8)°, γ = 83.6925(9)°, V = 465.652(14) Å3 (at 100 K); Z = 2. The adduct also crystallizes in the triclinic system, space group P{ie145-2}, a = 7.9338(3), b = 8.5421(3), c = 12.1506(7) Å, α = 96.961(3)°, β = 99.952(3)°, γ = 112.001(2)°, V = 736.25(6) Å3 (at 100 K); Z = 2. Tricarbonyltechnetium acetylacetonate has a centrosymmetrical dimeric structure. The dimerization occurs through the formation of a bridging bond with the methine carbon atom of the acetylacetonate ligand which is thus coordinated in the tridentate chelating-bridging fashion. The adduct has a monomeric structure with chelating coordination of the acetylacetonate ligand and coordination of diethylamine to the technetium atom via N atom. In both complexes, the carbonyl groups are in the fac position. Differences between the structures of tricarbonyltechnetium acetylacetonate in the crystal and in solution are discussed.

Key words

technetium acetylacetonates carbonyls crystal and molecular structure single crystal X-ray diffraction 

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • G. V. Sidorenko
    • 1
  • M. S. Grigor’ev
    • 2
  • V. V. Gurzhiy
    • 3
  • S. V. Krivovichev
    • 3
  • A. E. Miroslavov
    • 1
  • D. N. Suglobov
    • 1
  1. 1.Khlopin Radium Institute, Research and Production AssociationFederal State Unitary EnterpriseSt. PetersburgRussia
  2. 2.Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of SciencesMoscowRussia
  3. 3.Geological FacultySt. Petersburg State UniversitySt. PetersburgRussia

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