no T O R R E Y A 



TABLE 5. Molecular Coxfiguratiox of Some Active and Ixactive Benzoic Acids 



Substances 



Cell 

 elongation 



Formative 

 effects 



COOH 



Benzoic acid 



Inactive 



Inactive 



COOH 

 /\I 



2-Iodobenzoic acid 



Inactive 



Inactive 



COOH 



3-Iodobenzoic acid 



Inactive 



Inactive 



COOH 



4-Todobenzoic acid 



Inactive 



Inactive 



COOH 



/XI 



2,4-Diiodobenzoic acid 



Inactive 



Inactive 



COOH 



I I 



3,5-Diiodobenzoic .acid 



Inactive 



Active 



COOH 

 ABr 



NO2 



2-Bromo-3-nitrobenzoic acid 



Active 



Active 



COOH 

 /\C1 



XO2 



2-Chloro-5-nitrobenzoic acid 



Inactive 



Active 



