Chapter 6.4, Problem 8P

(a)

Interpretation Introduction

Interpretation:

From the given compounds, the compound with high regioselective ability towards addition of $HBr$ should be determined.

Concept introduction:

Addition Reaction: It is defined as chemical reaction in which two given molecules combines and forms product. The types of addition reactions are electrophilic addition, nucleophilic addition, free radical additions and cycloadditions. Generally, compounds with carbon-hetero atom bonds favors addition reaction.

The product of electrophilic addition reaction obtained by addition of electrophile to $s{p}^2$ carbon and the reaction goes the path which has formation of more stable carbocation.

Electrophile: Electrophiles are electron deficient compounds which accepts electrons from nucleophiles that results in bond formation.

Leaving group: it is a fragment that leaves substrate with a pair of electrons via heterolytic bond cleavage.

Chemical reaction involves bond making and breaking of two or more reactants in order to attain products from the reactants.

Cation: The positively charged chemical species is referred as cation.

Regioselective reaction: They are reactions which contain more than one product which are actually molecules with same molecular formula but different in the way they are connected and among those products only one product is major.

(b)

Interpretation Introduction

Interpretation:

From the given compounds, the compound with high regioselective ability towards addition of $HBr$ should be determined.

Concept introduction:

Addition Reaction: It is defined as chemical reaction in which two given molecules combines and forms product. The types of addition reactions are electrophilic addition, nucleophilic addition, free radical additions and cycloadditions. Generally, compounds with carbon-hetero atom bonds favors addition reaction.

The product of electrophilic addition reaction obtained by addition of electrophile to $s{p}^2$ carbon and the reaction goes the path which has formation of more stable carbocation.

Electrophile: Electrophiles are electron deficient compounds which accepts electrons from nucleophiles that results in bond formation.

Leaving group: it is a fragment that leaves substrate with a pair of electrons via heterolytic bond cleavage.

Chemical reaction involves bond making and breaking of two or more reactants in order to attain products from the reactants.

Cation: The positively charged chemical species is referred as cation.

Regioselective reaction: They are reactions which contain more than one product which are actually molecules with same molecular formula but different in the way they are connected and among those products only one product is major.