4-Hydroxy- and 5-hydroxyaldehydes exist primarily as cyclic hemiacetals. Draw the structure of the cyclic hemiacetal formed by each of the following:
a. 4-hydroxybutanal
b. 4-hydroxypentanal
c. 5-hydroxypentanal
d. 4-hydroxyheptanal
4-Hydroxy- and 5-hydroxyaldehydes exist primarily as cyclic hemiacetals. Draw the structure of the cyclic hemiacetal formed by each of the following:
a. 4-hydroxybutanal
b. 4-hydroxypentanal
c. 5-hydroxypentanal
d. 4-hydroxyheptanal