McMurry (Kap. 4.0) + Kap (4,1)

Question 1

What is a cycloalkane?

Answer 1

When an alkane is in a ring rather then an open chain.

Question 2

does the chemistry of a functional group get affected whether it is in a ring or a open chain?

Answer 2

Yes, that is why it is important to understand the consequences of cyclic structures

Question 3

Many organic compounds contain rings of carbon atoms, can you name any?

Answer 3

Crysanthemic acid

Prostaglandins

Steroids

Question 4

What defines a cycloalkane?

Answer 4

A saturated cyclic hydrdocarbon (also named alicyclic compound, or aliphatic cyclic).

Question 5

Unsubstituted cycloalkanes, how are they named?

Answer 5

1) First the word (cyclo-) needs to be placed before the parent.

2) The parent name, which gets its name off the number of C-in the ring (methane, ethane etc.)

Ex (cyclopropane, cyclobutene, cyclohexane).

Question 6

For substituted rings, how are they named?

Answer 6

1) Find the parent :
Count the number of carbons in the ring, and the number in the substituents.

If number of carbons in the ring is equal to or greater then the largest substituent = the compound is named as an alkyl substituted cycloalkane.

If number of carbons in the largest substituent is greater then the numbers in the ring = the compound is named as cycloalkyl-substituted alkane.

(ex. Methylcyclopentane or 1-cyclopropylbutane).

2) Number the substituent and write the name.

For a substituted cycloalkane, chose a point as C=1, and number the substituents on the ring so the second substituent has as low number as possible.

a) When two or more different substituents are present, that could receive the same number (ex. 2 and 5) or (5 and 2), number them alphabetically.