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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69df1ee7d8e87
DTSTAMP:20260415T011519
DTSTART:20141117T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20141117T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/490853
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Defining the nature of halogen bonding and other weak noncovalent i
 nteraction – Prof. Pierre Kennepohl\, UBC
DESCRIPTION:Prof. Pierre Kennepohl\, Department of Chemistry\,University o
 f British Columbia\, Vancouver\, BC\, Canada.Halogen bonding (XB) is a rec
 ently popular form of intramolecular interaction (often called noncovalent
  interaction) for the construction of supramolecular assemblies as an alte
 rnative to hydrogen bonding (HB) and coordinate bonding (CB). XB interacti
 ons are an attractive choice in this regard as they are highly directional
  and the strength of the interaction can be tuned over a very large range 
 (~ 5-150kJ/mol). Theoretical studies have converged on the idea that XB in
 teractions are (for the most part) dominated by electrostatic bonding but 
 the corresponding experimental data have been thus far lacking. This semin
 ar will outline our initial forays into defining XB interactions using a c
 ombination of electronic and vibrational spectroscopies. Most notably\, ou
 r results indicate that XB have a strong covalent (charge transfer) contri
 bution that must have important consequences on their chemical nature. The
  covalent contribution is significantly greater than what is observed in H
 B but of a similar magniture to CB. Our results are presented within the c
 ontext of providing an experimentally validated description of so-called n
 oncovalent interactions as a whole.Site web du groupe du Prof. KennepohlC
 ette conférence est présentée par le RQMP Versant Nord du Département
  de physique de l'Université de Montréal et le Département de génie ph
 ysique de Polytechnique Montréal.
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