The bond dissociation energies of Cd - CH ₃ in Cd(CH ₃ ) ₂ , and of CH ₃ -I in CH ₃ I

An adiabatic calorimetric system suitable for the study of reactions in vacuo and of reactions generating gaseous products is described. The system has been used to measure the heat of hydrolysis of cadmium dimethyl by water and dilute H$_{2}$SO$_{4}$, and to measure the heat of reaction of cadmium dimethyl and I$_{2}$ in ethereal solution. From these reaction heats, we obtain 66$\cdot $2 kcal. for the sum of the Cd-CH$_{3}$ bond dissociation energies in CdMe$_{2}$ (gas), and 55$\cdot $0$^{5}$ kcal. for the strength of the C-I bond in CH$_{3}$I, assuming the value 102$\cdot $0 kcal. for the dissociation energy of CH$_{3}$-H in CH$_{4}$.