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. Author manuscript; available in PMC: 2010 Feb 23.
Published in final edited form as: Chem Phys. 2009 Feb 23;357(1-3):4–16. doi: 10.1016/j.chemphys.2008.07.011

Fig. 9.

Fig. 9

The key normal modes of all-trans C18 (left) and central-cis C18 (right) responsible for the radiationless decay of the lowest-lying 21Ag- singlet state. The dimensionless coordinate shift (ΔQ, Eq. 7) and the electronic coupling term (H, Eq. 8) are listed along with the vibrational frequency (σ), in wavenumbers.