Isotope Effect on Dissociation Probabilities in the Mass Spectra of Chloroform and Chloroformhyphen;d

摘要

The mass spectra of the isotopic molecules CHCl3and CDCl3have been determined, using electron energies of 50 v and 70 v. It was found that the probability of dissociation of the C&sngbnd;H bond is approximately three times that for the dissociation of the C—D bond. The relative probability of dissociating H+Cl and D+Cl is the same as the relative probability of obtaining HCl+and DCl+ions, namely, about 1.6. Equal probability was observed for the dissociation of H+2Cl and D+2Cl. The probability of removing chlorine atoms is only slightly affected by the deuterium substitution.