Hydrogen bonding in bi- and tri-cyclic derivatives of salicyclic and 2-hydroxyisophthalic acids and their esters

Abstract

A study of the differences in the chemical shifts of the benzylic hydrogen atoms in 4,5-tetra- and penta-methylenesalicylates (II), 5,6-tetra-, penta-, and hexa-methylenesalicylates (III), and their O-ethoxycarbonylmethyl derivatives (IV) and (V) has enabled the site of hydrogen bonding in the 2-hydroxy-4,5-polymethyleneisophthalates (I) and related carbocylic acids to be established.