Chapter 1: 1.6 Polar Bonds

Question 1

Why are polar bonds important?

Answer 1

They dictate many of the properties of organic molecules you need to understand

Question 2

True or False:

If the bonds are polar, the molecule has to be polar

Answer 2

False.

WATCH OUT: Bonds can be polar or non-polar and molecules can be overall polar and non-polar

PAY ATTENTION: If you’re asked to think about a bond or a molecule

Question 3

Define:

Electronegativity

Answer 3

The tendency of atom to attract a bonded pair of electrons towards itself

Question 4

When would a polar covalent bond (i.e. a polar bond) occur?

Answer 4

Occurs between two different atoms with an electronegativity difference greater than 0.4

Question 5

How is a polar bond denoted?

Answer 5

By using a special dipole arrow or using delta positive/negative symbols

Question 6

What is needed for a molecule to be considered overall polar (posses a net dipole)?

Answer 6

1. At least one polar covalent bond
2. Appropriate geometry

Question 7

True or False:

A difference in electronegativity (dipole) is the only factor to consider when assigning a molecule as polar or non-polar

Answer 7

False, we must also consider molecular shape or geometry (VSEPR)