Abstract
The B ̃ ← X ̃ band system of NO 2, 2 Σ − g(π u) ← 2A 1 , has been measured in absorption in a neon matrix at 6 K, using 15NO 2 and N 18O 2 in addition to the normal isotope. The spectrum consists essentially of a single, long progression of bands terminating on successive levels of the bending mode in the upper state. Transitions to odd- and even- v 2′ states occur with a uniform intensity distribution indicating that the rotation of the bent ground state of NO 2 about its near-prolate axis is hindered in the matrix. The observations strongly suggest that the top axis of the molecule coincides with a C 2 axis of neon crystals in the polycrystalline matrix. Relative to the vapor absorption the matrix spectrum is red shifted by about 150 cm −1, the crystal field parameter V 2 and principal constants of the B ̃ state of 14N 16O 2 in neon being T 010 14 571 cm −1: x 22, −0.3 cm −1; w 2 460.2 cm −1: V 2, 80 cm −1.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
