Better Insights Into Reactions

  • Author: ChemistryViews
  • Published: 13 February 2011
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Science/AAAS
thumbnail image: Better Insights Into Reactions

Andrew Orr-Ewing and co-workers, Bristol University, UK, have used transient infrared absorption spectra to observe how solvent collisions affect the energy of the products of a chemical reaction. The results were obtained with picoseconds time resolution, allowing them to follow a chemical reaction in more detail than ever before.

The team studied the reaction of CN radicals with cyclohexane in chlorinated organic solvents. The main product, HCN, exhibited one quantum of the C–H stretching mode and up to two quanta of the bending mode. In the gas phase, HCN exhibits greater excitation in both the bending and stretching modes. The HCN products were seen to relax to the ground state through coupling to the solvent bath in ~100 to 300 ps. The reduced excitation in solution is attributed to dampening by the vibrational motion of the solvent.

This data will be used to better inform computer models designed to simulate chemical reactions in liquids for use in drug design, industrial processing, and applications in bio- and atmospheric chemistry.

Article Views: 2955

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permisson guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH