TRANSIENT INFRARED-ABSORPTION SPECTRUM OF THE NU-1 FUNDAMENTAL OF TRANS-DOCO

Using infrared (IR) difference-frequency laser spectroscopy and 193 nm photolysis of acrylic ACID(OD) the rotation-vibration spectrum of the nu1 O-D stretching fundamental of trans-DOCO radical has been recorde d and assigned. The assignment of the spectrum is based on the +0.9% g as phase-argon matrix shift of the band origins, on the H/D isotopic s hifts of the frequencies, and on the chemical reaction rate with O2. T he rotational constants confirm that the spectrum is due to the planar trans isomer. The band center is nu0 = 2684.102 cm-1. Perturbations a re observed in the K(a) = 1 and 6 levels, and information is obtained about the interacting states.