Alcohols Phenols And Ethers

(a) Grignard reagent reacts with aldehyde:

%5Ctext%7BC%7D_6%5Ctext%7BH%7D_5%5Ctext%7BMgBr%7D%20%2B%20%5Ctext%7BCH%7D_3%5Ctext%7BCHO%7D%20%5Cxrightarrow%7B%5Ctext%7BH%7D_2%5Ctext%7BO%7D%7D%20%5Ctext%7BC%7D_6%5Ctext%7BH%7D_5%5Ctext%7BCH(OH)CH%7D_3

Product: Secondary alcohol (1-phenylethanol) (b) Phenol treated with conc. HNO

_3

+ H

_2

_4

.
Solution:

%5Ctext%7BPhenol%7D%20%5Cxrightarrow%7B%5Ctext%7BHNO%7D_3%2FH_2SO_4%7D%202%2C4%2C6%5Ctext%7B-trinitrophenol%20(picric%20acid)%7D

(c) Anisole with CH

_3

COCl and anhydrous AlCl

_3

.
Solution:
Friedel–Crafts acylation occurs at para position:

%5Ctext%7BAnisole%7D%20%5Cxrightarrow%7B%5Ctext%7BCH%7D_3%5Ctext%7BCOCl%7D%2F%5Ctext%7BAlCl%7D_3%7D%20%5Ctext%7Bp-methoxyacetophenone%7D

(d) Propan-2-ol is heated with Cu at 573 K.
Solution:
Dehydrogenation to form propanone:

%5Ctext%7BCH%7D_3%5Ctext%7BCH(OH)CH%7D_3%20%5Cxrightarrow%7B%5Ctext%7BCu%7D%2C%20573%5Ctext%7BK%7D%7D%20%5Ctext%7BCH%7D_3%5Ctext%7BCOCH%7D_3

Chapter Questions
1 MCQs