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Hydrogen bonding to metal fluoride complexes

Posted on 20 October 2015

Every chemist knows about hydrogen bonding or thinks they do so

Hydrogen bonding to metal fluoride complexes

Yet, try to answer a few questions about hydrogen bonding to the ligands in the immediate vicinity of a transition metal.

  • Which metal fluoride will form the stronger H-bond, a d0 complex of very electropositive metals or a d8 complex of rather electronegative metals?
  • How do H-bonds to metal-fluoride complexes compare as H-bond acceptors to organic molecules? Are they like pyridine or like trimethylamine-N-oxide? Where would they sit on the scales of H-bond strength?
  • Molecular assemblies based on H-bonds are commonplace, so can we build one on the basis of metal-fluorides as H-bond acceptors?

These are some of the questions we have tried to answer in our new paper in JACS, resulting from our York-Sheffield-Cambridge collaboration.1 You will find some answers in the diagrams. Maybe we will be able to go to address the H-bonds to the ligands in metalloproteins or those formed during the extraction of metals.  

  1. The Contrasting Character of Early and Late Transition Metal Fluorides as Hydrogen Bond Acceptors, D. A. Smith, T. Beweries, C. Blasius, N. Jasim, R. Nazir, S. Nazir, C. C. Robertson, A. C. Whitwood, C. A. Hunter, L. Brammer and R. N. Perutz, J. Am. Chem. Soc. ASAP DoI: 10.1021/jacs.5b07509