OBSERVATION OF A PLANAR ISOMER OF THE N${_2}$O-(C${_2}$H${_2}$)${_2}$ TRIMER
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Date
2013
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Publisher
Ohio State University
Abstract
Infrared spectra of a planar isomer of the N${_2}$O-(C${_2}$H${_2}$)${_2}$ are observed in the region of $\nu_1$ fundamental band of N${_2}$O monomer ($\sim$2224~cm$^{-1}$) using a quantum cascade laser to probe a pulsed supersonic slit jet expansion. The band is simulated by an asymmetric top Hamiltonian with rotational constants of $A=2871$ MHz, $B=1140$ MHz, $C=816$ MHz and hybrid a/b-type transitions. It shows a relatively large blue-shift of about 9 cm$^{-1}$ with respect to the N${_2}$O monomer band origin. In addition to the normal istopologue, $^{15}$N${_2}$O-(C${_2}$H${_2}$)${_2}$ and N${_2}$O-(C${_2}$D${_2}$)${_2}$ are also observed. Here, we present our observation and experimental results which agree fairly well with a semi-empirical calculation which indicates that the lowest energy isomer has a planar structure very similar to that of OCS-(C${_2}$H${_2}$)${_2}$. \textbf{512}, 167 (2011).}
Description
Author Institution: Department of Physics and Astronomy, University of Calgary, 2500 University Drive North West, Calgary, Alberta, Canada T2N 1N4; National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6