Print out (or open chapter 4 powerpoint). On slide 10, look at the figure at the right side. Number the ring. Which of the following substituent

Print out (or open chapter 4 powerpoint). On slide 10, look at the figure at the right side. Number the ring. Which of the following substituent would receive No. 1?

A) 

-CH3

B) 

Either -Cl or -CH2CH3

C) 

-Cl

D) 

-CH2CH3

Question 2 

Look at the first question. What is the reason that -Cl but not -CH2CH3 should receive 1 in numbering the cyclo structure?

A) 

Because -Cl is a halogen group. Halogen has higher priority than an alkyl group.

B) 

Because chlorine group is located at the top of the structure.

C) 

Because -Cl is more reactive than -CH2CH3.

D) 

Because, when two or more substituent could receive the same number, number them by alphabetical priority. In this case, -Cl chlorine has higher priority than -CH2CH3 the ethyl group.

Question 3

cis and trans cycloalkane isomers are which kind of isomers?

A) 

enantiomers

B) 

racemate

C) 

constitutional isomers

D) 

stereoisomers

Question 4 

Cyclohexane ring rapidly flips between chair conformations under room temperature. Which statement is correct about this?

A) 

An original equatorial substituent would become an axial substituent after ring flip.

B) 

An original equatorial substituent would remain an equatorial substituent after ring flip.

C) 

Energy level is exactly the same before and after the ring flipping.

D) 

After ring flipping, it becomes a stereoisomer.

Question 5 

What are the three types of strains that may exist on a cycloalkane structure?

A) 

Enantiomer, diastereomer and epimer

B) 

Steric, angular and enantiomer

C) 

Steric, angular, and tortional

D) 

Angular, tortional and diastereomer

Question 6

If both No. 1 and No. 3 axial positions are hydrogens, would steric strain exist on 1,3-diaxial interaction?

A) 

No

B) 

Yes