Question

In nucleophilic substitution reaction the leaving ability order for the following species is (when attached to the $s{p}^3$ hybridized carbon).

Answer 1

$O$ $O$ $O$

$C{F}_3-\stackrel{||}{\underset{||}{S}}-O^{⊝},C_6{H}_6-\stackrel{||}{\underset{||}{S}}-O^{⊝},C_6{H}_5-O^{⊝},C{H}_3-\stackrel{||}{C}-O^{⊝}$

$O$ $O$

$I$ $II$ $III$ $IV$

Leaving ability order for given compound is:

$I>III>II>IV$ .