Abstract

The kinetics of decomposition of double salts p-XC 6H 4SbCl 4· p-YC 6H 4N 2Cl by powdered iron in acetone was studied. The reaction proceeds with the formation of diaryltrichlorostibine XC 6H 4(YC 6H 4)SbCl 3. The substitutes X increase the rate of reactions in order : O 2 < Cl < H < CH 3 < C 2H 5O. The substitutes Y increase the rate of reactions in order: C 2H 5O < CH 3 < H. The relationship between the stability of the double salts p-XC 6H 4SbCl 2·YC 6H 4N 2Cl and the character of substitutes X and Y was studied. The salts of this type decomposed readily to form XC 6H 4-(YC 6H 4)SbCl 3. The electronegative substitutes X and electropositive substitutes Y increase the stability of the salts. The electropositive X and electronegative Y decrease the stability of the salts. The mechanisms of the reactions are discussed. The assumption has been made that the decomposition of double diazonium salts by metal powders, leading to the formation of organometallic compounds (the Nesmeyanow reaction) is heterolythic in character. The relationship between the Nesmeyanow reaction and Waters reaction has been discussed.

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