The photochemistry of three carbonyl azides was studied by ultrafast time-resolved IR spectroscopy. Benzoyl, 2-naphthoyl, and pivavoyl azides are promoted to upper excited states S n with 270 nm excitation in chloroform. The S n states decay in 300 fs to form both the carbonylnitrenes and the S 1 excited states. The decay of the S 1 states of the carbonyl azides correlates with the growth of isocyanates. Formation of carbonylnitrene from S 1 is at most a minor process if it happens at all. The quantum yields of azide decomposition of these azides with 270 nm light are close to unity in chloroform.
ASJC Scopus subject areas
- Colloid and Surface Chemistry