Journal of inclusion phenomena

, Volume 4, Issue 1, pp 93–98

Coordination chemistry of alkali and alkaline earth cations. X-ray structural analysis of bis (benzo-15-crown-5) potassium nitrate monohydrate

  • W. S. Sheldrick
  • N. S. Poonia


The 1:2 charge separated KNO3 complex with benzo-15-crown-5 (B15C5) has been crystallized from a 50% water-methanol solution. K(B15C5)2NO3·H2O is monoclinic,P21/c,a=12.717(2),b=19.569(2),c=13.025(3) Å, β=100.79(1)o,Z=4,Dc=1.37 g·cm−3. The X-ray structure was refined toR=0.052 for 3049 independent reflections withF02≥2.0σ(F02), collected with MoK α radiation for a 2 θ-range of 4–44°. The K+ ion is coordinated tenfold in a crown sandwich through all five oxygen atoms of the macrocyclic ligand. Nitrate and water oxygens are not involved in the cation coordination sphere.

Key words

Potassium benzo-15-crown-5 sandwich complex counteracting anion effect X-ray structural analysis 


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Copyright information

© D. Reidel Publishing Company 1986

Authors and Affiliations

  • W. S. Sheldrick
    • 1
  • N. S. Poonia
    • 2
  1. 1.Fachbereich Chemie der Universität KaiserslauternKaiserslauternGermany
  2. 2.Chemistry DepartmentUniversity of IndoreIndoreIndia

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