C5

Question 1

What does conjugation produce

Answer 1

Enhanced stability
Changes to structure ( creates polarity)
Different reactivity
Characteristic spectroscopic behaviour ( absorption of ultraviolet and visible light ) which makes conjugated molecules coloured

Question 2

What is a conjugated molecule

Answer 2

Has alternating double and single bond
Starts and ends with a double Bond

Question 3

When does conjugation happen without alternating bonds

Answer 3

When a lone pair is adjacent to a double bond

Question 4

What happens when a molecule is conjugated

Answer 4

Extended pi bond is formed and the electrons are delocalised throughout the extended pi bond

Question 5

What effect does conjugation have on single Bond

Answer 5

It’s shorter in length
Have semi double bond characteristics

Question 6

Why do alternating double and single bonds have conjugation

Answer 6

They both have continuous uninterrupted run of 3 atoms or more each with an ubhybridised p orbital
( sp2 or sp hybridisation is a requirement for conjugation)

Question 7

The colour wheel

Answer 7

Look at the colour wheel