Which from following carbocations is least stable?

Which from following carbocations is least stable?
  1. $(\mathrm{R})_3-\mathrm{C}^{+}$
  2. $\quad(\mathrm{R})_2-\stackrel{+}{\mathrm{C}} \mathrm{H}$
  3. $\mathrm{R}-\stackrel{+}{\mathrm{C}} \mathrm{H}_2$
  4. $\quad \mathrm{H}_3 \stackrel{+}{\mathrm{C}}$

Solution

Order of stability of carbocation is: $\mathrm{R}_3 \mathrm{C}^{+}\gt\mathrm{R}_2 \stackrel{+}{\mathrm{C}} \mathrm{H}\gt\mathrm{R}-\mathrm{CH}_2^{+}\gt\mathrm{CH}_3^{+}$

Asked in: MHT CET 2024 (03 May Shift 2)

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