Diffussion Controlled Reaction of Fe（CO）₃ and CO in Ar and Xe Matrices

The diffussion controlled reaction of Fe（CO）₃ and CO in low temperature Ar and Xe matrices has been studied by measuring the decay rate of Fe（CO）₃ caused by the recombination of Fe（CO）₃ and CO. Fe（CO）₅ isolated in Ar and Xe matrices is photolyzed to generate Fe（CO）₃ with a 280nm pulsed laser. A Fourier Transform Infrared Spectrometer is used to monitor the decay of Fe（CO）₃ after the laser irradiation. The data are fitted by Smoluchowski diffusion controlled reaction kinetic theory satisfactorily. The reaction radius of Fe（CO）₃ and CO obtained is 4.0×10^-10m, and the diffusion coefficients of CO in Ar and Xe matrices at 10K are 2.2×10^-23and 4.5×10^-23m²/s, repectively.