Explanations 
Textbooks 
Flashcards 
91影视 AI 
Notes 
Study Plans 
Study Sets 
Find a degree 
Magazine Chapter 9: Q14P (page 481)
In the addition of just 1 mole of bromine to 1 mole of hept-1-yne, should the hept-1-yne be added to a bromine solution or should the bromine be added to the hept-1-yne? Explain your answer.
Short Answer
1mole of bromine should be added to the hept-1-yne solution.
Step by step solution
Addition of halogen to alkyne
When one mole of halogens like chlorine and bromine is added to alkyne to form dihaloalkane and two moles of halogens produce tetrahalides.
Step-2: Addition of bromine and hept-1-yne.
If we add one mole of hept-1-yne to the bromine solution, it will have a large excess of bromine in the solution. Therefore, hept-1-yne encounters a huge number of bromine molecules.
But if we add bromine first to hept-1-yne solution, it will have a large excess of hept-1-yne and the smaller proportion of brominegivesa good yield of dibromo product.
It will produce both syn and anti-product.
As by adding bromine first to hept-1-yne solution, the product yield will be good, therefore it is preferred.
Over 30 million students worldwide already upgrade their learning with 91影视!
