Conformations Flashcards
1
Q
How to draw the chair configuration
A
- Darw the sides of the middle portion
- Draw in the first half of each end
- Finally, complete the two ends
2
Q
Which is more stable : staggered or ecplipsed
A
Staggered
3
Q
What are the 3 types of strain
A
- Steric
- Torsional
- Angle
4
Q
Explain steric strain
A
- Destabilization due to the repulsion between the electron clouds of atoms or groups
- Groups try to occupy some common space
5
Q
Explain torsional strain
A
- Destabilization due to the repulsion between pairs of bonds caused by the electrostatic repulsion of the electrons in the bonds
- Groups are eclipsed
6
Q
What is a conformation
A
Different spatial arrangments that a molecule can adopt due to rotation about sigma bonds
7
Q
What are two types of conformations
A
Staggered and eclipsed
8
Q
Explain the staggered conformation
A
- A low energy conformation where the bonds on adjacent atoms bisect each other (60o dihedral angle)
- Maximizes the separation
9
Q
Explain the eclipsed conformation
A
A high energy conformation where the bonds on adjacent atoms are aligned with each other (0o dihedral angle)
