The correct stability order of alkyl substituted alkenes is

The correct stability order of alkyl substituted alkenes is
  1. $\mathrm{R}_2 \mathrm{C}=\mathrm{CHR} \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CH}_2 \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CR}_2$
  2. $\mathrm{R}_2 \mathrm{C}=\mathrm{CR}_2 \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CHR} \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CH}_2$
  3. $\mathrm{R}_2 \mathrm{C}=\mathrm{CH}_2 \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CR}_2 \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CHR}$
  4. $\mathrm{R}_2 \mathrm{C}=\mathrm{CR}_2 \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CH}_2 \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CHR}$

Solution

Order of stability of alkyl substituted alkenes: $\mathrm{R}_2 \mathrm{C}=\mathrm{CR}_2 \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CHR} \gt \mathrm{R}_2 \mathrm{C}=\mathrm{CH}_2$
Greater is the number of alkyl groups attached to the doubly bonded carbon atoms, greater is the stability of alkene.

Asked in: MHT CET 2024 (15 May Shift 2)

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