The reaction proceeds via an SN1 mechanism, which is characterized by a two-step process. In the first step, the leaving group departs, forming a carbocation intermediate. This step is the rate-determining step, and the stability of the carbocation plays a crucial role in the reaction's outcome. Once the carbocation forms, it can undergo rapid nucleophilic attack, leading to the formation of the final products.

When examining the details of the SN1 pathway, it is important to note that the major product formed in the following reaction is typically the one resulting from the most stable carbocation intermediate. For example, tertiary carbocations are more stable than secondary or primary carbocations, so if a tertiary carbocation is formed during the reaction, it is likely to lead to the major product.

Another aspect of the SN1 mechanism is that it often results in a racemic mixture if the intermediate carbocation is planar and the nucleophile can attack from either side. In these cases, the major product formed in the following reaction is not a single stereoisomer but a mixture of isomers. However, if there are steric or electronic factors that favor attack from a specific side, the major product formed in the following reaction might exhibit a slight preference for one isomer over the other.

In summary, the major product formed in the following reaction is influenced by the stability of the carbocation intermediate and the nature of the nucleophilic attack. By understanding these factors, it becomes clear that the major product formed in the following reaction is governed by the principles of the SN1 mechanism, leading to a mix of stereoisomers or, in some cases, a dominant stereoisomer if certain conditions are met.