Abstract
The laser-induced excitation spectrum of the (A) over tilde (2)Pi-(X) over tilde (2)Sigma(+) transition of SrCCH has been recorded at high resolution. A rotational analysis has been performed yielding rotational and fine structure parameters for the A state. In addition, a vibrational frequency for the Sr-C stretch (nu(3)) in the (A) over tilde (2)Pi state has been determined. Using the rotational constant of the A state, the Sr-C bond length was determined to be 2.43 angstrom, which is similar to 0.03 angstrom shorter than in the ground state. A comparison of the Lambda-doubling constant p, to those of the other alkaline-earth acetylides suggests that SrCCH and CaCCH appear to follow the pure precession model unlike MgCCH. Finally, a search for the (B) over tilde (2)Sigma(+)-(X) over tilde (2)Sigma(+) transition was negative, as with CaCCH, suggesting that the (B) over tilde state may be predissociative. (c) 2005 Elsevier Inc. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 197-202 |
| Number of pages | 6 |
| Journal | JOURNAL OF MOLECULAR SPECTROSCOPY |
| Volume | 233 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Oct 2005 |
Keywords
- SrCCH
- strontium-bearing molecules
- monoacetylides
- laser spectroscopy
- alkaline-earth metal bond
- METALLIC FREE-RADICALS
- C BENDING VIBRATION
- AB-INITIO
- (X)OVER-TILDE(2)SIGMA(+) STATES
- CALCIUM MONOACETYLIDE
- WAVE SPECTRUM
- SPECTROSCOPY
- CACCH
- MGCCH
- CCH