Hetrocyclic Compound

 Organic Chemistry Part 

Introduction:- 

Generally cyclic compound has two types that is homocyclic compound and heterocyclic compound where homocyclic compound are those compound which are made up of only carbon atom and heterocyclic compound these compounds are made up of more than one kind of atom. In this blog we have study hetrocyclic compound. 

Molecular orbital and aromatic characteristics of pyrrole,furan,thiophene and pyridine

Furan,Pyrole and thiophene this compound do not expect properties because I often does not undergo the oxidation expect of sulphide and pyrrole does not possess the basic properties typical of amine but hetrocyclic compound and their derivative most commonly undergoes electrophilic substitution reaction such as Nitration sulphonation and halogenation and more important reaction Fridel craft acylation. 

Heat of combustion of these compound indicate resonance stabilization of the 22 to 28 calorie per mole somewhat less than resonance energy of benzene but greater than conjugated dienes on the basis of properties Firon spiral and thiophene must be considered aromatic because it can follow huckel rules to see the picture which are given in below

Informing those Bond the atom use SP2 hybridization which lie in a plane and form a 120 degree angle. Since the electronegativity of heteroatoms are in the order oxygen is greater than nitrogen and nitrogen is greater than sulphide it is in line structure as written about should be more important in thiophene then Firon Firon is the least aromatic if these three heterocyclic to see the picture which are given below