SN1 and SN2

Question 1

SN1 depends on what ?

Answer 1

1 concentration of reactant

Question 2

SN2 depends on what?

Answer 2

2 concentrations of reactants

Question 3

Leaving groups

what makes a good one

Answer 3

unstable in molecule but stable on their own or in a solution

Halogens

I>Br>Cl>F

Question 4

SN1

the leaving group will produce a what?

Answer 4

carbocation

rate limiting step

Question 5

SN1 the reaction depends on what?

Answer 5

Concentation of substrate only

does not care about the abundance of nucliophile

Solvent concentration does not affect the rate of an SN1 rxn

Question 6

SN2 rxn rate depends on what?

Answer 6

concentration of both the nucliophile and substrate

no carbocation formed

after SN2 rxn R–>S S–> R

Question 7

What is the driving force in an SN2 Rxn?

Answer 7

Strength of Nu atack

Question 8

Factors that promote SN1?

Answer 8

need tertiary or secondary structure

Need a Polar Protic

ex. water methanol Ethanol

Question 9

Factors that promote SN2 rxn?

Answer 9

Polar Aprotic
Acetone DMSO

Strong and small nucliophile

non bulky to fit due to steric contraints

aggressive Nu

SN2 favores methyl and primary - sometimes secondary but NEVER tertiary