Photodissociation Spectroscopy of

Abstract

The photodissociation spectrum of is obtained from the yields of fragment ion as a function of photodissociation wavelength in the 400–1400 nm region. Two bands at 440 and 580 nm are attributed to the C ← X and the B ← X local excitation (LE) bands, respectively. Both the most intense band at 920 nm and relatively weak one at 1160 nm are assigned to charge resonance (CR) bands. The red‐shift of the B ← X band from that of and the cross sections at the CR bands much larger than those at the LE bands are consistent with a sandwich structure for . The appearance of the two CR bands is explained on the basis of displaced sandwich structures for .