. The molecular rearrangement of carbon compounds. GOgH )^10^ )CI0^ ^ ^ )<^Io ^ ^ 10^ lO^ 57 In order then to accertain the relative stahility of two isomer-ic substances one has only to compare the logarithm of theirionization constants. Pitcher and Pfisters^^^ very general principle, thatthe imsaturated acids of the aliphatic series have greaterionization constants than any of their isomers, increases thevalidity of DerickVs principle that true rearrangements of thenon-reversihle type take place in
. The molecular rearrangement of carbon compounds. GOgH )^10^ )CI0^ ^ ^ )<^Io ^ ^ 10^ lO^ 57 In order then to accertain the relative stahility of two isomer-ic substances one has only to compare the logarithm of theirionization constants. Pitcher and Pfisters^^^ very general principle, thatthe imsaturated acids of the aliphatic series have greaterionization constants than any of their isomers, increases thevalidity of DerickVs principle that true rearrangements of thenon-reversihle type take place in the direction to decrease thefree energy of ionization, A few examples will serve to illust-rate this fact: Tahle II Ionization constant Name E Log X X 10^ A-Hexanoic acid I,89X 10*^ 1,277 -Eexanoic acid 2,64)^ lO^ zf-Eexanoic acid -•^ A-Hexanoic acid /C^-Pentanoic acid A^-Pentanoic acid Xio^ Z5^-Pentanoic acid A10 Lerick finds that this principle holds for unsaturatedacids in both o
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