Kinetics and dynamics of azoalkane photofragmentation: Direct studies using transient CARS spectroscopy
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A fundamental and long-standing question surrounds the mechanism of primary bond cleavage in azoalkanes: do the two C-N bonds break in a synchronous or a stepwise manner? When a vapor phase azoalkane absorbs near ultraviolet light, it dissociates into two alkyl radicals and nitrogen. Transient CARS spectroscopy was used here as a time-resolved probe of the photoproducts formed from azoalkanes excited at 355 nm. In a detailed reinvestigation, azomethane was found to dissociate in a stepwise process involving a methyldiazenyl radical intermediate. The diazenyl intermediate was formed in less than 1 ns and lived for 5.3
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Burton, Katherine Ann. "Kinetics and dynamics of azoalkane photofragmentation: Direct studies using transient CARS spectroscopy." (1990) Diss., Rice University. https://hdl.handle.net/1911/16323.