Infrared Spectrum of the Trichloromethyl Radical in Solid Argon

摘要

The primary products of the reaction of lithium atoms and carbon tetrachloride in solid argon at 15deg;K are lithium chloride and the trichloromethyl radical, which are identified by infrared spectral studies. Natural chlorine isotopes, carbon 13 and bromine substitution, and loss of CCl3absorptions with attendant growth of absorptions due to C2Cl6on sample warming verify the molecular identity. Assignments to the carbonndash;chlorine stretching vibrationsngr;1thinsp;equals;thinsp;674andngr;3thinsp;equals;thinsp;898cmminus;1are supported by normal coordinate calculations, and the weak bending modesngr;2andngr;4were not detected. The stretching force constantsFtgr;thinsp;equals;thinsp;3.83mdynthinsp;sol;thinsp;Aring;andFtgr;tgr;thinsp;equals;thinsp;0.43mdynthinsp;sol;thinsp;Aring;are compared with those of other chlorocarbons and BCl3This comparison supports proposed resonance stabilization of the trichloromethyl radical.