Structure and magnetic properties of a hydroxo-bridged copper(II) distorted cubane stabilized via supramolecular hydrogen bonding with an ionic hexafluoroacetylacetonate

Inorg Chem. 2006 May 29;45(11):4325-7. doi: 10.1021/ic060167e.

Abstract

Tetranuclear [Cu(II)4(OH)4(aib)4)](hfac)4 (1; aib = 2-methyl-2-amino-4-iminopentane; hfac = hexafluoroacetylacetonate) forms from the reaction of aqueous ammonia and Cu(hfac)2.2H2O in acetone. The structure of 1 reveals that four noncoordinating hfac- counterions stabilize the distorted cubane complex via multiple H-bonding contacts. Magnetic susceptibility studies reveal that cubane-like 1 is best described as a pair of independent antiferromagnetically coupled dimers with g = 2.10 and J/kB = -298 K (207 cm(-1)) (H = -2JS1.S2).

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Algorithms
  • Copper / chemistry*
  • Crystallography, X-Ray
  • Hydrocarbons, Fluorinated / chemistry*
  • Hydrogen Bonding
  • Models, Molecular
  • Pentanones / chemistry*

Substances

  • Hydrocarbons, Fluorinated
  • Pentanones
  • hexafluoroacetylacetonate
  • Copper