120 Conformations

Question 1

Position: Staggered

Answer 1

Low Energy, groups are maximally distant. (Symmetric molecules)

Question 2

Position: Eclipsed

Answer 2

High Energy, groups are on top of each other. (Symmetric molecules or Butane sigma-bond rotation)

Question 3

Position: Gauche

Answer 3

Low energy, staggered groups with the large group on one end (For Butane sigma-bond rotation)

Question 4

Position: Syn

Answer 4

Highest energy, special eclipsed position where the largest groups are on top of each other. (For Butane sigma-bond rotation)

Question 5

Position: Anti

Answer 5

Lowest energy, special staggered position where the largest groups are opposite. (For Butane sigma-bond rotation)

Question 6

Sequence of positions! (Start with Syn) (For Butane sigma-bond rotation)

Answer 6

Syn, gauche, eclipsed, anti, eclipsed, gauche, syn, repeat

Question 7

Sequence of positions! (For symmetric molecules)

Answer 7

Eclipsed, staggered, eclipsed, staggered, eclipsed, staggered.

Question 8

What’s a carbocation?

Answer 8

Electrophile! Has a positive charge, seeks e-

Question 9

What’s a carbanion?

Answer 9

Nucleophile! Negative charge, seeks a positive center.

Nucleophiles attract electrophiles.