کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5378009 | 1504829 | 2017 | 4 صفحه PDF | دانلود رایگان |
- Weakly-bound trimer CO-(CO2)2 observed for first time.
- b-type band in carbon monoxide C-O stretch region.
- Missing levels with (Ka“, Kc”)Â =Â (e, o) and (o, e).
- Structure like CO2 dimer, plus CO along symmetry axis.
- C-bonded form observed, but not O-bonded.
The infrared spectrum of the weakly-bound trimer CO - (CO2)2 is observed in the carbon monoxide CO stretch region. Both 12C16O - (12C16O2)2 and 12C16O - (12C18O2)2 isotopologues are studied. The trimer band which is composed uniquely of b-type transitions and with missing levels establishes the trimer structure as that of a CO2 dimer plus a CO monomer aligned along the dimer C2 symmetry axis. The dimer to monomer center of mass separation is 3.55 à , and the structural parameters within the CO2 dimer subunit are about 3.45 à and 58°. It is not certain if the (CO2)2 remains planar within the trimer.
94
Journal: Chemical Physics Letters - Volume 677, 1 June 2017, Pages 127-130