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.
Soulard
Pascale
P
Université Pierre et Marie Curie-Paris 6, CNRS Laboratoire Dynamique Interactions et Réactivité, UMR 7075, Case 49, Place Jussieu, 75252 Paris Cedex 05, France.
Asselin
Pierre
P
Cuisset
Arnaud
A
Aviles Moreno
Juan Ramon
JR
Huet
Thérèse R
TR
Petitprez
Denis
D
Demaison
Jean
J
Freedman
Teresa B
TB
Cao
Xiaolin
X
Nafie
Laurence A
LA
Crassous
Jeanne
J
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