Answer to Question #350489 in Organic Chemistry for Subham Saikia Saha

Question #350489

Choose the correct option: Important factors that influence the E1 reaction mechanism

i. Electron donating ability of substituents

ii. Good leaving group

iii. solvents of high polarity

iv. All of the above

Expert's answer

The most important stage of E1 reaction is the first stage - the loss of a leaving group:

This stage depends on two main factors: a good leaving group X and stability of a carbocation.

The stability of a carbocation depends on its structure and solvent:

  • the electron-donating ability of substituents: more electron-donating substituents like alkyl groups make the carbocation more stable (carbocations, where R1 and R2 are alkyl groups, are more stable than carbocations with R1 = H and/or R2 = H);
  • solvents of high polarity: more polar solvent makes the carbocation more stabilized.

Therefore all 3 mentioned factors influence the E1 reaction mechanism.

Answer: iv. All of the above

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