CHEM 334L QUIZ #1 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
Why is it known as a [4+2] cyclo-addition? Ans✓✓✓it has 4 electrons
from 1,3-butadiene and 2 from maleic anhydride
What is the purpose of the CaCl₂ drying tube? Ans✓✓✓it prevents
excess moisture
Why use xylene as solvent? Ans✓✓✓to have a higher boiling point to
increase temperature
What does the boiling chip help with? Ans✓✓✓helps bring solvents to
boiling point and is heated evenly
What does reflux mean? Ans✓✓✓to bring to boiling point and vapors
will condense
Why was 3-sulfolene used instead of using 1,3-butadiene, directly?
Ans✓✓✓3-sulfolene is a solid at room temperature while the other is a
gas
Does the product have one or more chiral carbons? Ans✓✓✓No
Is the product optically active? Why or why not? Ans✓✓✓No because
in order to have an optically activity there has to be a chiral carbon
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
Why is it known as a [4+2] cyclo-addition? Ans✓✓✓it has 4 electrons
from 1,3-butadiene and 2 from maleic anhydride
What is the purpose of the CaCl₂ drying tube? Ans✓✓✓it prevents
excess moisture
Why use xylene as solvent? Ans✓✓✓to have a higher boiling point to
increase temperature
What does the boiling chip help with? Ans✓✓✓helps bring solvents to
boiling point and is heated evenly
What does reflux mean? Ans✓✓✓to bring to boiling point and vapors
will condense
Why was 3-sulfolene used instead of using 1,3-butadiene, directly?
Ans✓✓✓3-sulfolene is a solid at room temperature while the other is a
gas
Does the product have one or more chiral carbons? Ans✓✓✓No
Is the product optically active? Why or why not? Ans✓✓✓No because
in order to have an optically activity there has to be a chiral carbon
