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The A 1Π(u)←X 1Σ Electronic Transition of CCN+ and CNC+

✍ Scribed by Muriel Wyss; Evgueni Riaplov; John P. Maier; Majdi Hochlaf; Pavel Rosmus

Publisher
John Wiley and Sons
Year
2001
Tongue
German
Weight
122 KB
Volume
84
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

to Edgar Heilbronner on the occasion of his 80th birthday as reminder of all the years together in the Physikalisch-Chemische Anstalt and the common SNF projects.

The electronic absorption spectra of the A 1 P (u) 2 X 1 S g transition of CCN and CNC have been observed in a 5 K Ne matrix after mass selection of C 2 N . CCN has the origin band at 462.0(2) nm. The vibrational structure with frequencies 1223(20) and 1725(20) cm À1 corresponds to the symmetric and antisymmetric stretching modes in the excited state. The origin band of CNC is observed at 325.7(2) nm, and the system shows extensive vibrational excitation. Calculations of the potential energy functions of CCN and CNC in their X 1 S g ground state and the A 1 P state of CCN followed by variational evaluation of the rovibronic energy levels allows the assignment of the observed spectra. These spectroscopic data open the way to gas-phase studies of the astrophysically important C 2 N ions.

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