Measurement of the Parameters of Selective Multiphoton Dissociation of 2-Chloroethenyl Dichloroborane Molecules by Pulsed CO2 Laser Radiation

The parameters of boron isotope-selective IR multiphoton (MP) dissociation of 2-chloroethenyl dichloroborane molecules (HClC=CHBCl2) under the action of pulsed CO2 laser radiation were measured. The laser radiation frequencies were tuned in resonance with the low-frequency wing of the IR absorption band of HClC=CH10BCl2 molecules. The dependences of the dissociation yields and selectivity of HClC=CH10BCl2 and HClC=CH11BCl2 molecules on the intrinsic gas pressure, laser radiation intensity and frequency, and N2 inert buffer gas and BCl3 resonance buffer gas pressures were obtained. At sufficiently high intrinsic pressures of HClC=CBCl2 (66.5−266 Pa) and moderate laser radiation intensity (2–3 J/cm2), high MP dissociation parameters are achieved: dissociation yields of HClC=CH10BCl2 molecules of up to 6–9% and selectivity from 30 to 100.