Molecular interactions

Question 1

Ionic bond characteristics?

Answer 1

Charge-Charge bond
Electrostatic interactions
can be salt bridges

Question 2

Covalent bond characteristics?

Answer 2

Result of e- sharing instead of transfer. Overlapping of e- radius= intermolecular distance shorter than Vander Waals radius.
The electronegativity difference defines the bond.

Question 3

Differences in electronegativity defined?

Answer 3

0-0.4= Covalent bond
0.4-2.0= Polar covalent bond
>2.0= Ionic bond

Question 4

Vander Waals interaction characteristics?

Answer 4

Arises when neutral groups carrying dipoles (or partial charges) approach.

Question 5

H-Bonding characteristics?

Answer 5

Involves donor where H+ has partial positive charge. Shorter distance of H-Bond reflects partially covalent nature of H-Bonds.

Question 6

Hydrophobicity effects?

Answer 6

Occurs between molecules that cannot interact with water.
Ex-Oil and water: Oil is nonpolar, the molecules coalesce together through Vander Waals interactions and minimize surface area in contact with water.