Question
Draw formulas for the first five members of each homologous series beginning with the following compounds.
(a) H–COOH
(b) CH3COCH3
(c) H–CH=CH2
Solution
First five-member of given compounds:
a) H-COOH
i) H-COOH, = methanoic acid
ii)CH3COOH, = Ethanoic acid
iii)CH3CH2COOH=proponic acid
iv)CH3CH2CH2COOH= butanoic acid
v) CH3CH2CH2CH2COOH= pentanoic acid
(b) CH3COCH3
i) CH3COCH3 =2-propanone
ii)CH3CH2COCH3=2-butanone .
iii)CH3CH2CH2COCH3=2-pentanone
iv)CH3CH2CH2CH2COCH3=2-hexanone
v)CH3CH2CH2CH2CH2COCH3= 2-heptanone
(c) H–CH=CH2
i) CH2=CH2 = ethene
ii) CH3CH2=CH2= Propene
iii) CH3CH2CH2=CH2 =Butene
iv) CH3CH2CH2CH2=CH2 =pentene
v) CH3CH2CH2CH2CH2=CH2 =Hexene
