Chapter 9, Problem 1CTQ

Interpretation Introduction

Interpretation: The given reaction needs to completed by adding curved arrow and drawing the product formed.

  

Concept Introduction: Curved arrows are used in organic reactions to show the movement of electrons. Here, electrons move from electron rich species to electron deficient species. A carbocation is formed when valency of carbon is not completed and it has a positive charge on it. The order of stability is such that tertiary carbocation is highly stable and primary carbocation is least stable.

Answer to Problem 1CTQ

  

Explanation of Solution

In the given reaction, Br-Br bond breaks resulting formation of 2 Br with partial positive and partial negative charge. The bromine with partial positive charge can attack on double bond of alkene resulting formation of a carbocation and bromine ion.

The movement takes place from negative charge species to positive charge. Here, double bond in alkene is considered as electron rich thus, double bond attacks on Br with partial positive charge. This results in the formation of secondary carbocation. The overall reaction can be represented as follows:

  

Conclusion

The complete reaction can be represented as follows: