In a spectroscopic study of C 60 , Negri et al. (J. Phys. Chem. 100, 10849 (1996))

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In a spectroscopic study of C60, Negri et al. (J. Phys. Chem. 100, 10849 (1996)) assigned peaks in the fluorescence spectrum. The molecule has icosahedral symmetry (Ih). The ground electronic state is A1g, and the lowestlying excited states are T1g and Gg.

(a) Are photon-induced transitions allowed from the ground state to either of these excited states? Explain your answer.

(b) What if the molecule is distorted slightly so as to remove its centre of inversion?

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