Nitrous oxide tetramer has two highly symmetric isomers

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Journal titleJournal of Chemical Physics
Article number74310
SubjectFundamental bands; Infrared spectrum; Isotopic substitution; Nitrous oxide; Non-polar; Pulsed supersonic jet expansions; Symmetric rotors; Tetramers; Tunable diode lasers; Anesthetics; Nitrogen oxides; Oligomers; Rotors; Spectroscopy; Supersonic aerodynamics; Isomers
AbstractInfrared spectra of the nitrous oxide tetramer, (N 2O) 4, are studied in the region of the N 2O 1 fundamental band (∼2200 cm -1). The spectra are observed using a tunable diode laser to probe a pulsed supersonic jet expansion. Parallel (ΔK = 0) bands are observed for the previously observed isomer of (N 2O) 4, which is confirmed by isotopic substitution to have an oblate symmetric rotor structure with D 2d symmetry. A distinct new isomer of (N 2O) 4 is observed by means of a perpendicular (ΔK = ±1) band. It has a prolate symmetric rotor structure with S 4 symmetry. These isomers represent two distinct, but almost equally favorable, ways of bringing together a pair of nonpolar N 2O dimers to form a tetramer. It is not clear at present which one represents the true ground state. © 2011 American Institute of Physics.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Steacie Institute for Molecular Sciences (SIMS-ISSM)
Peer reviewedYes
NPARC number21271534
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Record identifier4be6e402-be79-46c2-8dc7-c26b74515814
Record created2014-03-24
Record modified2016-05-09
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