Chapters 21-22- Organic chemistry II

Question 1

What are the four criteria for aromaticity?

Answer 1

The molecule is cyclic (a ring of atoms)
The molecule is planar (all atoms in the molecule lie in the same plane)
The molecule is fully conjugated (p orbitals at every atom in the ring)
The molecule has 4n+2π electrons (n=0 or any positive integer)

Question 2

Aldehydes

Answer 2

R-HC=O

Question 3

Ketones

Answer 3

R-C(=O)-R’

Question 4

Imines

Answer 4

R2C=NR

Question 5

Describe some physical properties of aldehydes and ketones

Answer 5

They are polar compounds because of the presence of the oxygen, therefore interact in the pure state by dipole-dipole interactions.
High boiling point for mass
Soluble in water