2321. MORIKAWA, K., BENEDICT, W. S., AND TAYLOR, H. S. Activity of Specific Bonds in Complex Molecules at Catalytic Surfaces. I. The Carbon-Hydrogen Bond in Methane and Metahen-d4. Jour. Am. Chem. Soc., vol. 58, 1936, pp. 1445-1449; Chem. Abs., vol. 3

2321. MORIKAWA, K., BENEDICT, W. S., AND TAYLOR, H. S. Activity of Specific Bonds in Complex Molecules at Catalytic Surfaces. I. The Carbon-Hydrogen Bond in Methane and Metahen-d4. Jour. Am. Chem. Soc., vol. 58, 1936, pp. 1445-1449; Chem. Abs., vol. 30, 1936, p. 6632.

CH₄ undergoes exchange with D₂, CD₄, and D₂O on active Ni catalysts at 138° and above. At 184° the rate of reaction decreases in the order CD₄, D₂, and D₂O. The activation energy of reaction for CD₄ is approximately 19 kg.-cal., and for D₂ approximately 28 kg.-cal. The reaction is explained by an activated, dissociative absorption of CH₄ on surface areas not occupied by H-D or D₂O.