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yeah so basically no reaction is purely SN1 or purely Sn2 its always a mixture of both and the overall order which we see is nothing but what that majority of reaction follows so now going by ur question, we do have to check about the substrate to inspect SN2 mechanism but in this case, since the reaction conditions are made in such a way that the overall ...

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The Hunsdiecker reaction is a halogenation-decarboxylation reaction of silver salts of carboxylic acids. To understand what causes the yield to change, first we have to consider the mechanism of the reaction. As seen from the mechanism the homolytic cleavage of the $\ce{O-X}$ bond is the slowest step in the reaction and thus is the rate determining step. ...

3

No, aryl halides are not a type of vinyl halides. A compound is called an aryl halide when it contains a halogen group directly attached to an aromatic system. For example, Whereas a compound is called a vinyl halide when it contains a halogen group directly attached to a doubly bonded carbon atom. For example, The double bonds in an aromatic system are ...

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Here is a mechanism for the cleavage. After proton transfer, the carbocation has a resonance contributor. Nucleophilic attack can occur on the ethyl group because there is a good leaving group. The electrophilic addition can happen, with iodide attacking the carbocation. However, it is reversible. Iodide is a good leaving group, and the carbocation is ...

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