CPT-Nomenclature & Isomerism (IIT JEE)

n-butane

2,4-dimethyl pentane

benzene

1-methyl propane

2-butene

2-butyne

2-butanol 

Butanal

1

2

3

4

Geometrical isomerism, position isomerism

Geometrical isomerism, conformational isomerism

Optical isomerism, geometrical isomerism

Optical isomerism, metamerism

Tautomerism 

Optical isomerism

Geometrical isomerism

Geometrical and optical isomerisms

n-propylmethyl ether      

Butane-1-ol

2-methylpropane-2-ol 

Butanone

1-phenyl-2-butene 

3-phenyl-1-butene

2-phenyl-1-butene  

1, 1-Diphenyl-1-propene

Each forms equal number of isomers for a given compound

If in a compound one is present then so is the other

Both are included in stereoisomerism

They have no similarity

Isomeric compounds                                              

 Optical isomers

Meso compounds

Chiral compounds

1, 2 dichloro-1-pentene   

1, 3-dichloro-2-pentene

1, 1-dichloro-1-pentene

1, 4-dichloro-2-pentene

2, 3-Dichloropentane 

2, 3-Dichlorobutane

2-Chlorobutane  

2-Hydroxypropanoic acid

Boiling points 

Vapour pressure at the same temperature

Heat of vaporization

Gaseous densities at the same temperature and pressure

3-dimethylamino-3-methylpentane                   

3-(N, N-trimethyl)-3-amino pentane

3-(N, N-trimethyl) pentanamine

3-(N, N-dimethyl) amino-3-methylpentane

Alkyne, 3° amine    

Alkene, 2° amine 

Alkene, 3° amine

Alkyne, 2° amine

4-methyl-2-ethyl-hex-2-en-5-ol      

3-methyl-4-ethyl-hex-1-en-5-ol

3-ethyl-2-hydroxy-4-methyl hex-5-ene

None of the above.

1-chloro-2-ethyl-4-hydroxy but-2-ene

4-hydroxy-1-chloro-2-ethyl but-2-ene

4-chloro-2-ethyl but-2-en-1-ol         

2-ethyl-4-chlorobut-2-en-l-ol

 2-methyl-3-ethyl pentane

3-ethyl-2-methyl pentane

3-isopropylpentane  

1, 1-diethyl-2-methyl propane

2-ethyl-bromonailine

4-bromo-2-ethyl aniline

4-bromo-2-ethyl benzene amine                   

2-ethyl-4-bromo-benzene amine

2-methyl-3-ethyl-1-pentane 

3-ethyl-4-methyl-4-pentene

3-ethyl-2-methyl-1-pentene

3-methyl-2-ethyl-1-pentene

4-ethyl-2-pentene 

4-methyl-2-hexene

3-ethyl-2-pentene 

2-ethyl-3-pentene

5, 6-dimethyl-3-methyl decane                                  

5, 6-diethyl-3-methyl decane-4-ene

3, 5, 6-trimethyl dec-6-end

5, 6-diethyl-8-methyl dec-6-ene

1,2,3-Propanetricarbonitrile

1, 2, 3-cyanopropane

1, 2, 3-propanetrinitrile          

3-cyano-1, 5-pentane dinitrile

4-iodo butane  

2-iodo butane

  1-iodo-3-methyl propane 

2-iodo-2-methyl propane

Ethoxy propanone      

 1, 1-dimethyl ether 

2-ethoxy isopropane

2-ethoxypropane

5-methyl-hex-3-en-2-ol

2-methyl-hex-3-en-5-ol

2-hydroxy-5-methyl-3-hexene

5-hydroxy-2-methyl-3-hexene

2-amino-3-hydroxy propanoic acid                         

1-hydroxy-2-amino propan-3-oic acid

1-amino-2-hydroxyprpanoic acid 

3-hydroxy-2-amino propanoic acid

1, 1, 3-trimethylcyclohex-2-ene                                   

1, 3, 3-trimethylcyclohex-1-ene

1, 1, 5-trimethylcyclohex-5-ene   

2, 6, 6-trimethylcyclohex-1-ene

1-(cyclohexa-2, 4-dienyl) ethanone

3-(cyclohexa-2, 4-dienyl) ethanone

1-(cyclohexa-3, 5-dienyl) ethanone

3-(cyclohexa-3, 5-dienyl) ethanone

pent-3-en-1-yne

pent-3-en-4-yne

pent-2-en-4-yne  

pent-2-en-3-yne