Nucleophilic Substitution

Question 0

Is Sn1 a 2 step or 1 step reaction?

Answer 0

2 step reaction

Question 1

Is Sn1 1st r 2nd order reaction?

Answer 1

1st order reaction

Question 2

Is Sn1 unimolecular or biomolecular? And what is it?

Answer 2

Unimolecular

only are chemical species involved in rare determining step.

Question 3

What is the Sn1 rate equation?

Answer 3

Rate = k[alkyl halide]

Question 4

What carbocation does Sn1 prefer?

Answer 4

Tertiary

Question 5

What is Sn1 solvent? And an example

Answer 5

polar protic

eg. alcohols, water.

Question 6

What is Sn1’s nucleophile?

Answer 6

weak

Question 7

What is Sn1’s big barrier?

Answer 7

Carbocation stability - prefers stable

Question 8

What is the stereocemistry of Sn1?

Answer 8

Mix of retention and inversion

Question 9

Is Sn2 1st or 2nd order reaction?

Answer 9

2nd order reaction

Question 10

Is Sn2 one or two step reaction?

Answer 10

one step reaction

Question 11

is Sn2 unimolecular or biomolecular? and what is it?

Answer 11

Biomolecular

Subtrate and nucleophile both involved in rate determining step

Question 12

What in the Sn2 rate equation?

Answer 12

Rate = k[alkyl halide][nucleophile]

Question 13

What carbocations does Sn2 prefer?

Answer 13

Prefers primary carbocations

Question 14

What is the solvent of Sn2? and give example

Answer 14

Polar aprotic

eg. dnso, acetone. Needs to be aprotic otherwise it would bond hydrogen to the nucleophile.

Question 15

what is the Sn2 nucleophile?

Answer 15

strong like matthew

Question 16

What is the Sn2 big barrier?

Answer 16

big barrier is steric hindrance.

rate increases if nucleophile can approach the carbon easily

Question 17

What is the stereochemistry of Sn2?

Answer 17

inversion