MDCAT Chemistry MCQ #986

Which atomic structure factor explains why transition states in SN2 reactions favor back-side attack?

MDCAT Chemistry MCQ #986

  1. Question 1

    Q1. Which atomic structure factor explains why transition states in SN2 reactions favor back-side attack?

    • A) Electron configuration of the leaving group
    • B) Steric hindrance from lone pairs on the central atom
    • C) Hybridization state of the electrophilic carbon
    • D) Spin multiplicity of the nucleophilic electron

    Answer: Hybridization state of the electrophilic carbon

    Explanation: Sp3 hybridization creates a tetrahedral geometry. Steric hindrance and electron configuration of leaving groups affect rate but not attack orientation.