Knowledge Bank

The experimental detection of molecular parity violation in \emph{Handbook of High Resolution Spectroscopy}, Vol.~1(Eds. M. Quack and F. Merkt), Wiley, Chichester, New York \textbf{2011}, 659-722, M.~Quack, J.~Stohner and M.~Willeke, \emph{Annu.~Rev.~Phys.~Chem.} \textbf{2008}, \emph{59}, 741, A.~Bakasov, T.K.~Ha, and M.~Quack, \emph{J.~Chem.~Phys.} \textbf{1998}, \emph{109}, 7263, R.~Berger and M.~Quack, \emph{J.~Chem.~Phys}, \textbf{2000}, \emph{112}, 3148.} $\Delta PVE$ is of great interest because of its importance in the understanding of fundamental aspects of molecular dynamics and symmetries. One possible method for this is measuring rovibrational or rotational frequency shifts in the infrared or microwave spectra of enantiomers \textbf{2000}, \emph{84}, 3807, M.~Quack and J.~Stohner. \emph{J.~Chem.~Phys.}, \textbf{2003}, 119, 11228.}. For that reason we have measured and analysed the rotationally resolved infrared spectrum of CDBrClF as a prototype spectrum for a chiral molecule using three different techniques. The spectrum has been recorded at room temperature with the Zurich Bruker IFS spectrometer ZP 2001 in \emph{Handbook of High Resolution Spectroscopy}, Vol.~2 (Eds. M. Quack and F. Merkt), Wiley, Chichester, New York \textbf{2011}, 965-1019, S. Albert and M. Quack, \emph{ChemPhysChem}, \textbf{2007}, \emph{8}, 1271-1281.} and with the Bruker interferometer 2009 connected to the Swiss synchrotron \textbf{2011}, \emph{150}, 71-99.} using a resolution of 0.0007~cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$. In addition, the IR spectrum of CDBrClF has been measured at low temperature with our diode laser jet setup in the $\nu 5$ region. The spectra of the two major isotopomers CD$\mathrm{<mrow\; data-mjx-texclass="ORD">81</mrow>}$Br$\mathrm{<mrow\; data-mjx-texclass="ORD">35</mrow>}$ClF and CD$\mathrm{<mrow\; data-mjx-texclass="ORD">79</mrow>}$Br$\mathrm{<mrow\; data-mjx-texclass="ORD">35</mrow>}$ClF have been analysed within the $\nu 5$ (CCl-stretch), $\nu 4$ (CF-stretch) and $\nu 3$ (CDF-bend) regions. A detailed rovibrational analysis of these bands is presented. The role for possible experiments in the experimental detection of molecular parity violation shall be discussed.