CHEM1112 Lecture Notes - Lecture 5: Atomic Orbital, Electrophile, Benzene
19 May 2018
School
Department
Course
Professor
Explain the special stability of benzene and why it doesn't react like
an alkene
Screen clipping taken: 13/08/2017 9:12 PM
Bonds identical
-
Ring flat
-
Mobile cloud of electrons above and below plane
-
NOT just a group of 3 double bonds
-
If 3 or more p orbitals in an uninterrupted sequence
-
Ie. Double single double sequence
-
Conjugation
Benzene
Screen clipping taken: 13/08/2017 9:14 PM
Aromaticity
Conjugated
-
Cyclic
-
Contains 4n + 2 electrons (ie. 2, 6, 10 etc)
-
3 conditions
Aromatic ring attacks an electrophile with its mobile electron cloud
○
Usually need to add a catalyst like a lewis acid to make electrophile more reactive
○
Electrophilic aromatic substitution SEAr
-
Substitutions on aromatic rings
5.1
Sunday, 13 August 2017
9:11 PM
5. Aromatic compounds Page 1
