aromatic chemistry

Question 1

structure in a benzene ring

Answer 1

compounds with benzene are aromatic they have a planar cyclic structure consigns f a ring of carbon atoms each with a single hydrogen atom sticking out into a flat plane

Question 2

nature of bonding in a benzene ring

Answer 2

delocalised electron system arise due to overlap of one p oribtal from each carbon atom above and below the plane of ring, electrons are shared evenly so all bond length are the same between the bond

Question 3

why is benzene more stable than theoretical molecules

Answer 3

the delocalisation of p electrons means there are alternating double and single bonds that is reflected in the hydrogenation of benzene being less exothermic

Question 4

explain why substitution reactions occur in preference to addition reactions

Answer 4

because lots of energy is needed to disrupt the delocalised system

Question 5

electrophilic substitution of benzene

Answer 5

electrophilic attack on benzene rings result in substitution , the benzene ring is a region of high electron density which means it attracts electrophiles