Which graph best represents the energy profile of a reaction when an enzyme is present?

Classify each reaction as a substitution, an elimination, or neither. Identify the leaving group in each reaction, and the nucleophile in substitutions.

a.

The product of the Stille coupling reaction (A) tautomerizes in a basic solution to give compound B. B spontaneously converts to C.

(c) Suggest a mechanism for the conversion of B to C

Aluminum trichloride (AlCl₃) dissolves in ether with the evolution of a large amount of heat. (In fact, this reaction can become rather violent if it gets too warm.) Show the structure of the resulting aluminum chloride etherate complex.

Which of the following analogies best describes the induced-fit model of enzyme-substrate binding?

In the context of reaction mechanisms, what do both the $\rho$-dependent and $\rho$-independent mechanisms of termination have in common?

In the context of a photosystem, what is the primary role of the reaction center?

Which of the following statements best describes the induced fit model of enzyme activity?

Which of the following is not a type of reaction mechanism in organic chemistry?