1.

(i) Draw the structures of all isomeric alcohols of molecular formula C_(5)H_(12)O annd give their IUPAC names. (ii) Classify the isomers of alcohols in questions 1 (i) as primary, secondary ad tertiary alcohols.

Answer»

Solution :Eight isomers are POSSIBLE. These are:
(a) `underset("Pentan-1-ol "(1^(@)))(CH_(3)CH_(2)CH_(2)CH_(2)CH_(2)OH)`
(B) `underset("Pentan-2-ol "(2^(@)))(CH_(3)CH_(2)CH_(2)-overset(OH)overset(|)(C)H-CH_(3))`
(c) `underset("Pentan-3-ol "(2^(@)))(CH_(3)CH_(2)-overset(OH)overset(|)(C)H-CH_(2)CH_(3))`
(d) `underset("2-Methylbutan-1-ol "(1^(@)))(CH_(3)CH_(2)-overset(CH_(3))overset(|)(C)H-CH_(2)OH)`
(e) `underset("3-Methylbutan-1-ol "(1^(@)))(CH_(3)-overset(CH_(3))overset(|)(C)H-CH_(2)CH_(2)-OH)`
(F) `underset("2-Methylbutan-2-ol "(3^(@)))(CH_(3)-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-CH_(2)CH_(3))`
(g) `underset("2,2-Dimethylpropan-1-ol "(1^(@)))(CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)OH)`
(h) `underset("3-Methylbutan-2-ol "(2^(@)))(CH_(3)-overset(CH_(3))overset(|)(C)H-overset(OH)overset(|)(C)H-CH_(3))`


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