page 44 Flashcards
What does the energy diagram for an
SN2 reaction represent?
A: The change in energy as the reaction progresses from reactants to products, including the transition state.
What is the transition state in an
SN2 reaction?
A: A high-energy state where the C–Br bond is partially broken, and the C–O bond is partially formed.
What is the transition state in an
SN2 reaction?
A: A high-energy state where the C–Br bond is partially broken, and the C–O bond is partially formed.
What is
Ea in the context of the
SN2
energy diagram?
A: The activation energy, or the energy barrier that must be overcome for the reaction to proceed.
How is the transition state characterized in an
SN2 reaction?
A: By partial negative charges on the nucleophile and the leaving group.
What happens to the energy after the transition state in an
SN2 reaction?
A: The energy decreases as the products are formed
What is
ΔH in the
SN2 energy diagram?
A: The enthalpy change of the reaction, representing the difference in energy between reactants and products.
What does the initial flat line in the
SN2 energy diagram represent?
A: The energy level of the reactants before the reaction begins.
What does the final flat line in the
SN2 energy diagram represent?
A: The energy level of the products after the reaction is complete.
Why is the
SN2
reaction called a concerted mechanism?
A: Because bond formation and bond breaking occur simultaneously in a single step.
What role does the nucleophile play in the
SN2 transition state?
A: It attacks the electrophilic carbon, starting to form a new bond while the leaving group departs.
