Retarding Action of Various Metallic Salts of some Aromatic Carboxylic Acid on the Reaction between Aluminum Particles and Carbon Tetrachloride

摘要

In the preceding paper it was shown that the reaction between aluminum particles and carbon tetrachloride was ionic considering the relation of the induction period with each metallic salt versus their electric conductivity. Now the simi1ar studies using various metallic salts of some aromatic carboxylic acid which may ionize in the organic solvent are carried out. The result obtained is as follows: (1) In the influence of water of crystallization on the induction period the linear relation was not found between the critical concentration of the induction period and the water content, as was suggested by M. Stern， and it is explained that its discrepancy came from the difference of each temperature at which water was liberated. (2) For the 6 sorts of aromatic carboxylic acids the order of the prolonged effect is as follows: salicylic -> methylenedisalicylic -> alkylsalicylates > benzoic-. (3) In various metallic salts of aromatic carboxylic acid, metallic salicylates or metallic methylenedisalicylates gave the negative effects compared with respective acid, while metallic benzoates gave the positive effects. (4) Since various metallic salts of aromatic carboxylic acid have respectively specified ionizing abi1ity in the organic solvent, some relation of the critical concentration to the induction period versus the specific coductivity is obtained.