Chapter 4-Cycloalkanes

Question 1

Cycloalkanes/alicyclic compounds

Answer 1

Saturated cyclic hydrocarbons
-rings of CH2 units

Question 2

Cycloalkanes general formula

Answer 2

(CH2)n

Question 3

Naming cycloalkanes

Answer 3

5 sides and 1 (less) carbon in substituent: methyl cyclopentane

3 sides and 4 (more) carbon in substituent: 1-cyclopropylbutane

Question 4

Stereoisomers

Answer 4

Molecules with the same connections but different geometry

Question 5

Cis

Answer 5

On the same side

Question 6

Trans

Answer 6

Across

Question 7

Angle strain

Answer 7

Due to expansion or compression of bond angles

Question 8

Torsional strain

Answer 8

Due to eclipsing of bonds

Question 9

Steric strain

Answer 9

Due to repulsive interactions when atoms approach each other too quickly

Question 10

Ideal tetrahedral bond angle

Answer 10

109.5

Question 11

Axial position

Answer 11

Up or down in line with the bond bend

Question 12

Equatorial position

Answer 12

Slightly up or slightly down (always the opposite of the axial position which is up or down)

Question 13

Ring-flip

Answer 13

Chair Conformation changing axial and Equatorial positions

Question 14

1,3-diaxial interactions

Answer 14

Steric strain due to two groups in axial position next to each other

Question 15

Polycyclic molecules

Answer 15

Multiple rings fused together

Question 16

Why are shaped puckered

Answer 16

To relieve torsional strain