5 6-376 nm, k-2.4 X IO9 M-'sI) a nd that a (linear) correlation of the observed pseudo-first- order rate constants for the growth of 2 vs [pyr], extrapolated to [pyr]= 0, gave ko-1.1 X IO7 sl, a rate constant that represented the sum of all first-order and pseudo-first-order decay channels of 1 in the absence of~ yr.~ These competitive pathways included intermolecular reactions of 1 with its diazirine precursor (3) 5 and with solvent, as well as intramolecular 1 ...
