Identification Of New cis Vibrational Levels In The S 1 State Of C 2 H 2 J. H. Baraban, P. B. Changala, R. G. Shaver, R. W. Field, J. F. Stanton, A. J.

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Identification Of New cis Vibrational Levels In The S 1 State Of C 2 H 2 J. H. Baraban, P. B. Changala, R. G. Shaver, R. W. Field, J. F. Stanton, A. J. Merer

S 1 C 2 H 2 cis-trans Isomerization Primer cis bend, q 6 trans bend, q 3 trans T cis T E TS ≈ 4979

Extra Levels

cis B 1 vibrational symmetry

6.3 cm  One-photon hot bands IR-UV double resonance via 3 ’’, J’’ = K-staggering in cis-6 2 “ A  B ” = 

Merer et. al., J. Chem. Phys, 134, , K-staggering in cis

Merer et. al., J. Chem. Phys, 134, , 2011.

- Franck-Condon active - Stretches - Pure Bending Polyads - Stretch-Bend Combinations

- Franck-Condon active - Stretches - Pure Bending Polyads - Stretch-Bend Combinations - 3 n B n

Excitation in v 3 distorts bending polyads Steeves et. al., J. Mol. Spec., 256, 256, 2009.

Acknowledgements Field Group Members: Anthony P. Colombo G. Barratt Park Adam Steeves Hans Bechtel Funding DOE J. H. Baraban, J. F. Stanton, A. J. Merer, R. W. Field, Mol. Phys. (FASE special issue), 2012, accepted. J. H. Baraban, P. B. Changala, A. J. Merer, A. H. Steeves, H. A. Bechtel, R. W. Field, Mol. Phys. (FASE special issue), 2012, accepted.