Question

Consider the following carbanions.
I)$C{H}_3-C{H}_2^{-}$
II)$C{H}_2=C{H}^{-}$
III)$CH\equiv \stackrel{-}{C}$
Correct order of stability of these carbanions in decreasing order is:

• A. I > II > III
• B. III > II > I
• C. I > III > II
• D. III > I > II

Answer 1

The correct option is B III > II > I

As s-character of orbital increases, the stability of carbanion increases and corresponding conjugate acid character increases.
So, stability of anions is - III ($sp$) > II ($s{p}^2$) > I ($s{p}^3$)