Chlorofluoroiodomethane as a potential candidate for parity violation measurements.
CHFClI is among the more favorable molecules for parity violation (PV) measurements in molecules. Despite the fact that calculated PV effects are two orders of magnitude smaller than in some organometallic compounds, CHFClI displays interesting features which could make possible a new experimental PV test on this molecule. Indeed, ultrahigh resolution spectroscopy using an ultrastable CO(2) laser is favored by several intrinsic properties of this molecule. For example, the high vapor pressure of CHFClI allows investigation by supersonic beam spectroscopy. Indeed, the spectroscopic constants have been accurately determined by microwave and millimetre wave spectroscopy. This is important for the subsequent selection of an appropriate absorption band of CHFClI that could be brought to coïncide with the absorption of CO(2). Partially resolved (+)- and (-)-CHFClI enantiomers with respectively 63.3 and 20.5% ee's have been recently prepared and analyzed by molecular recognition using chiral hosts called cryptophanes. Finally, the S-(+)/R-(-) absolute configuration was ascertained by vibrational circular dichroïsm (VCD) in the gas phase.
Université Pierre et Marie Curie-Paris 6, CNRS Laboratoire Dynamique Interactions et Réactivité, UMR 7075, Case 49, Place Jussieu, 75252 Paris Cedex 05, France.
Pascale
P
Soulard
Pierre
P
Asselin
Arnaud
A
Cuisset
Juan Ramon
JR
Aviles Moreno
Thérèse R
TR
Huet
Denis
D
Petitprez
Jean
J
Demaison
Teresa B
TB
Freedman
Xiaolin
X
Cao
Laurence A
LA
Nafie
Jeanne
J
Crassous
D002942:Circular Dichroism; D006846:Hydrocarbons, Halogenated / Q000138:chemical synthesis / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D013057:Spectrum Analysis; D013237:Stereoisomerism
D006846:Hydrocarbons, Halogenated; C509810:chlorofluoroiodomethane