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Haloalkanes And Haloarenes

Question
CBSEENCH12007828

How will you bring about the following conversions?
 Ethanol to But-1-yne.

Solution
CH subscript 3 CH subscript 2 OH space rightwards arrow from 625 space straight K to Al subscript 2 straight O subscript 3 of space CH subscript 2 space equals space CH subscript 2 space
C H subscript 2 space equals space C H subscript 2 space plus space H B r space rightwards arrow space space C H subscript 3 C H subscript 2 B r space

C H subscript 3 C H subscript 2 B r space plus stack N a C space identical to space C H with left parenthesis S o d i u m space a c e t a l i d e right parenthesis below rightwards arrow space C H subscript 3 stack C H subscript 2 straight C space identical to C H with 1 minus b u t y n e below space plus N a B r