Isomerism

Question 1

Isomer

Answer 1

Substance with same molecular formula but different arrangement of atoms.

Question 2

Optical isomer

Answer 2

One central carbon atom attached to four different substituents, creating two molecules that are mirror images of each other but not identical. They interact with plane polarised light.

Question 3

What is a suitable reducing agent to give you a H- in nucleophilic addition?

Answer 3

NaBH4

Question 4

How do geometric isomers arise?

Answer 4

When you have restricted rotation somewhere in the molecule (C=C)

Question 5

Ciral centre

Answer 5

Central carbon

Question 6

What is a racemic mixture and why is it formed in some reactions?

Answer 6

Optical inactive/ equal mixture of enantiomers

Planar carbonyl group attacked by nucleophile

Question 7

How could two separate samples of stereoisomers be distinguished?

Answer 7

Plane polarised light which will be rotated in opposite directions

Question 8

Stereoisomer

Answer 8

Same molecular formula and same structure but atoms are arranged differently in space

Question 9

How does E-Z isomerism arise?

Answer 9

No free rotation about the C=C