Question

Compare the two systems of classifying reactions – what similarities and differences are there between them? What factors are used to determine what a reaction is classified as according to what atoms do? What different classifications fall under this category? What factors are used to determine what a reaction is classified as according to type? What different classifications fall under this category? (Nature of each classification method, what each focuses on to classify reactions, what similarities and differences exist, and how the two relate, as well as how most reactions can have at least 1 classification from each of the two systems.)

Answer 1

The classification schemes are only for convenience; same reaction can be classified in different ways, depending on which of its characteristics is most important.

Exp. Acid–base reactions and one kind of exchange reaction.

MECHANISTIC CLASSIFICATIONS

Mechanistic classifications of chemical reactions date back to the work of Ingold, who categorized reactions into mechanistic classes: such as SN2/SN1 and E1/ E2.

There have been a number of attempts to develop Ingold’s basic concept of a mechanistic reaction typology into a fuller classification; the best known has been accepted as an IUPAC standard. The scheme, reliant upon intellectual coding, provides a linear notation, descriptive of both structural changes and mechanism, and includes chemical changes other than valence bond formation and breaking; weak associations, conformational changes, and bond rotations.

CLASSIFICATIONS BASED ON STRUCTURAL CHANGE :

Well-known is bond Change/Ring Change Classification : This reaction classification describes reaction in terms such as formation of C-C bond, reduction of C=O bond, or formation of six-membered ring have been used for many years for systematized information .