1. SATISH PRADHAN DNYANASADHANA COLLEGE, THANE
DEPARTMENT OF CHEMISTRY
IUPAC NOMENCLATURE By
SPM GROUP (Shyama Prasad Mukherjee Group)
Roll No. 69 to 73
Mentor – Vinod Sir

2. IUPAC NOMENCLATURE Bicyclic compounds Biphenyls Cumulenes
4 marks topic – Q. 5 (C) in Semester V university examination
Bicyclic compounds
Saturated and Unsaturated, upto 11 carbon atoms only
Biphenyls
Cumulenes
upto 3 double bonds

3. Content Classification of compounds IUPAC name writing scheme
Numbering rules
Solving examples

4. Classification COMPOUNDS BICYCLO BIPHENYLS CUMULENES SPIRO FUSED
Has two rings
Classified based on ring attachment
No. common Carbon atoms
2 phenyl rings attached by C-C bond
2 or more cumulative double bonds
SPIRO
FUSED
BRIDGED
One C atom common
Spiro atom
Two C atoms common
Bridge head atoms
Two C atoms common with bridge Carbons

5. PA suffix prefix CT [ ] IUPAC name writing scheme-Bicyclic
[ ] PA
suffix
Substituents attached
e.g. –CH3, -NO2, -NH2 -OH, -X, -OR,
Compound
Spiro
Bicyclo
No. of C atoms
Except common C atoms
No.s separated by dot
Parent Alkane
Total No. of C atoms
Functional gp.
Generally –COOH, ketone, -SO3H, C=C,
Spiro –
Ascending order e.g. [5.6]
Bicyclo –
Descending order e.g. [6.5.x]
Fused – x = 0 and Bridged x = 1,2,3…

6. IUPAC name writing scheme- Biphenyls and cumulenes
prefix CT
suffix
Substituents attached
e.g. –CH3, -NO2, -NH2 -OH, -X, -OR
Compound
Biphenyl
Functional gp.
Generally –COOH, ketone, -SO3H, C=C,
For cumulenes use basic IUPAC writing scheme…..
prefix + Parent alkane + Functional Group viz. double bonds, -COOH
For double bonds-
2- diene, 3 – triene, 4- tetraene

7. CT/Rule Spiro Bicyclic Biphenyls Start Path Example Pattern
Numbering rules…….
CT/Rule
Spiro
Bicyclic
Biphenyls
Start
C adj. to Spiro atom
One of the bridge head C atom
C atom joining two benzene rings
Path
*SR to LR
*LR to SR
One ring Other ring
1,2,3,…. 1’, 2’, 3’,…
Example
Pattern
Sub. And fn. Gp. Will get lowest no. alphabetically
*SR- smaller ring and *LR – larger ring

8. Examples……..
We will solve the examples from Semester V question paper

9. Examples……..

10. Examples……..

11. THANK YOU! to Dr. R. P. Chavan, Head, Dept. of chemistry
Incharge – Dr.(Mrs.) K. R. Rathod and Co-incharge – Satu sir
IUPAC nomenclature competition 17-18
Mentor – Vinod sir
All respective teachers and my friends.