2.25 - Intermolecular Interactions Flashcards
Finish the sentence: A number of interactions between molecules are considerably ______ than typical covalent and polar covalent bonds
Weaker
What is the most common type of intermolecular interaction?
London Forces
What are London Forces?
The interactions of electrons to form temporary dipoles
What can London Forces exist between?
Any type of molecule - polar or non-polar
How do London Forces vary with an increase in electrons?
They increase in number
What does this mean?
The boiling point increases
Why?
Because more London Forces need to be overcome
What are Dipole-dipole interactions?
Attraction or repulsion between two polar molecules
How do these work?
The two ends of different polar molecules attract if they have opposite partial charges, and vice versa for repulsion
What is the other type of intermolecular interaction?
Hydrogen bonding
What is key for hydrogen bonding to exist?
The atom bonded to the hydrogen has to be more electronegative than hydrogen itself
What does a hydrogen bond in water exist between?
The oxygen of one molecule and hydrogen of another
What, other than dipole-dipole interaction, is there with hydrogen bonding?
Partial bond formation
How is it shown?
A bond between the lone pair of the oxygen and the hydrogen of the other molecule
What is the bond angle?
180
