delocalisation

Question 1

Delocalisation

Answer 1

Where electrons are shared between three or more atoms

Question 2

Why do molecules become less reactive and more stable, the more delocalised atoms are in a molecule?

Answer 2

As the electron density is spread across multiple atoms, therefore the overlapping p-orbitals are more stable as pi bonds can be spread across a larger volume. This lowers the energy= more stable

Question 3

What is partial pi behaviour?

Answer 3

Where there is an alternating single bond

Question 4

When does delocalisation across a single sigma not occur?

Answer 4

When there is a presence of two sigma bonds separating two pi systems ( sp3 hybridised carbon ) as no overlap is possible

Question 5

what is the true allyl cation

Answer 5

hybrid of two resonance forms

Question 6

what causes a single bond to decrease in length

Answer 6

by increasing the amount of hybridisation around the carbons