Question

Which of the following gem diols is stable:

$\left(a\right)H_{3}C-\stackrel{OH}{\stackrel{|}{\underset{O{H}_3}{\underset{|}{C}}}}-H\left(b\right)B{r}_{3}C-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-H$
$\left(c\right)F_{3}C-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-H\left(d\right)H_5{C}_6-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-C_6{H}_5$

• A. a
• B. b
• C. c
• D. d

Answer 1

The correct option is C c

$\left(c\right)F_{3}C-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-H$
due to intra molecular hydrogen bonding.