Isomers :
Isomers Isomers: different compounds with the same molecular formula.
Same number of carbon and other atoms.
Same degree of unsaturation.
Same % of elemental composition.
Must have different physical or chemical properties.
Isomers :
Isomers Degree of unsaturation from Structural formula
It is defined as the sum of no of p bonds and number of cycles in a compound.
Example
Cyclopropane p bond=0 cycle=1 Du =1
Propene p bond=1 cycle=0 Du =1
Cyclopropene p bond=1 cycle=1 Du =2
Benzene p bond=3 cycle=1 Du =4
Napthalene p bond=5 cycle=2 Du =7
Isomers :
Isomers Degree of unsaturation from Molecular formula :-
If molecular formula of any compound is CnHmClxOyNz.
Where n is number of carbon atoms.
Where m is number of hydrogenn atoms.
Where x is number of monovalent atoms like Cl,Br,I,F etc.
Where y is number of oxygen atoms.
Where z is number of nitrogen atoms.
Then D.U=(2n+2+Z-m-x)/2.
Isomers :
Isomers D.U=(2n+2+Z-m-x)/2.
Example
C4H10 n=4 m=10 DU=0
C6H10 n=6 m=10 DU=2
C6H6 n=6 m=6 DU=4
C4H8Cl2 n=4 m=8 X=2 DU=0
C4H10O n=4 m=10 y=1 DU=0
C100H200Cl10O10N10
n=100 m=200 x=10 Z=10
DU=(100x2+2+1o-200-10)/2
DU=1.
Isomers :
Isomers
Isomers :
Isomers Which functional group is expected to be possible for C10H20 Cl BrO2
A. Carboxylic Acid
B. Acid chlorice
C Ketone.
D.Alcohol
Ans. D (Here DU for given formula is 0
All other functional groups requires 1 Du.
Concept Developed by :
Concept Developed by Chandana.