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Question 1

When do reactions occur?

Answer 1

When molecules collide and overcome activation energy barrier
When HOMO (nucleophile) overlaps with LUMO (electrophile)

Question 2

Two key components for a reaction to occur?

Answer 2

Electrons move from HOMO into LUMO so needs to be an energy match
Molecules need to be drawn together by electrostatic forces (charges or dipoles draw to each other)

Question 3

What is HOMO?

Answer 3

Highest occupied molecular orbital ( nucleophile)

Question 4

What is LUMO?

Answer 4

Lowest unoccupied molecular orbital (electrophile)

Question 5

Order the better nucleophiles

Answer 5

lone pair> double bond> single bond

Question 6

What does filling an antibonding orbital do?

Answer 6

Break the bond

Question 7

Are pi bonds electrophiles or nucleophiles?

Answer 7

Nucleophiles donate electrons

Question 8

What is an intermediate?

Answer 8

Formed in one step consumed in another

Question 9

What is a substitution reaction?

Answer 9

A substituent is replaced with a nucleophile can be one or two step process.

Question 10

What is a lewis acid?

Answer 10

Electron acceptor