Stereochemistry And Mechanisms

Question 1

Loss of chirality

Answer 1

Achiral planar intermediate, nucleophile can attack from either face so gives a racemic mixture, tells us its Sn1 not SN2

Question 2

Neighbouring group participation

Answer 2

Explains reaction mechanisms if no inversion or racemisation

Question 3

Sn1

Answer 3

Racemic

Question 4

SN2

Answer 4

Inversion

Question 5

2 x SN2

Answer 5

Retention