Question

Which from following alkenes is highly stabilized ?

• A. \(\text{R}_2\text{C} = \text{CR}_2\)
• B. \(\text{R}_2\text{C=CH}_2\)
• C. \(\text{RCH=CHR}\)
• D. \(\text{RCH=CH}_2\)

Hint:

More alkyl groups on the double bond give more hyperconjugation and higher stability.

Answer 1

The Correct Option is A

Step 1: Rule:
Stability order is tetra > tri > di > mono substituted alkenes.

Step 2: Classify:
Option (A) is tetra-substituted, (B) and (C) are di-substituted, (D) is mono-substituted.

Step 3: Result:
The tetra-substituted alkene in option (A) is the most stable.

Final Answer:
Tetra-substituted alkene is most stable. \[ \boxed{\text{(A) }\text{R}_2\text{C=CR}_2} \]