title: Ultrafast carbene-carbene isomerization.
abstract: The photochemistry of two isomeric aryl diazo ketones was investigated by fs time-resolved UV-vis and IR spectroscopies. Both diazo ketone excited states decompose in less than 300 fs by multiple pathways. One pathway involves concerted Wolff rearrangement and nitrogen extrusion, most likely in the syn rotomer. In the anti rotomer of one isomer, oxygen migration proceeds in concert with nitrogen extrusion to form rearranged keto carbene. This rotomer excited state also decomposes to form unrearranged carbene, which isomerizes in 5 ps.
authors: Department of Chemistry, Ohio State University, Columbus, Ohio 43210, USA.
authors: Jin
authors: J
authors: Wang
authors: Gotard
authors: G
authors: Burdzinski
authors: Jacek
authors: J
authors: Kubicki
authors: Terry L
authors: TL
authors: Gustafson
authors: Matthew S
authors: MS
authors: Platz