Abstract
Resonance Raman spectra were obtained within and to the red of the B-band absorption spectrum of gas phase chloroiodomethane and chloroiodomethane in cyclohexane solvent. The spectra show the fundamental and overtones of the nominal CI stretch ( nν 5) and combination bands of the CH 2 wag ( ν 3), ICCl bend ( ν 6), and the CH 2 scissor ( ν 2) fundamentals with the CI stretch bands ( nν 5). The chloroiodomethane B-band short-time photodissociation dynamics have significant substituent effects relative to the B-band of iodomethane due to the presence of the CCl chromophore n( X) → σ ∗ ( CX) transitions ≈170 nm that are close to the B-band absorption of chloroiodomethane but absent in iodomethane.
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