On the basis of FTIR product analysis of the UV-visible (A 1 300 nm) photolysis of C12- SiHC13 mixtures in 700 torr of N2-02, C1 atoms were shown to predominantly undergo an H- atom abstraction reaction rather than an attachment/displacement reaction with SiHC13. The corresponding rate constant k [CI+ SiHC13] was determined at 298 K to be 2.9 X lo-''cm3 molecule-'s-'by the competitive kinetic method with reference to the C1+ C2H6 reaction. IR ...