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Hydrocarbons

Question
CBSEENCH11007848
Wired Faculty App

Starting from Ethyne, how will you prepare (No mechanism):
(i) Ethanol (ii) Vinyl chloride (iii) Methyl vinyl ether (iv) Vinyl acetate?

Solution

(i) Ethanol: It is obtained by the following steps of reaction:
space space space space stack HC space identical to CH with Ethyne below space plus space straight H subscript 2 space rightwards arrow with Pd minus BaSO subscript 4 on top space CH subscript 2 space stack equals CH subscript 2 with Ethene below space space space space space space space space space space space space space space space space space space space space space space space rightwards arrow with straight H subscript 2 SO subscript 4 left parenthesis conc right parenthesis. on top space stack CH subscript 3 minus CH subscript 2 HSO subscript 4 with Ethyl space hydrogen space sulphate below space rightwards arrow from boil to straight H subscript 2 straight O of space stack CH subscript 3 CH subscript 2 OH with Ethanol below
(ii) Vinyl chloride: Ethyne reacts with one mole of HCl to form vinyl chloride.
HC with Ethyne below space identical to space CH space plus space CH subscript 3 OH space rightwards arrow from 433 minus 473 space straight K to CH subscript 3 OK of stack space straight H subscript 2 straight C space equals space CH space minus space straight O space minus space CH subscript 3 with Methyl space vinyl space ether below
(iii) Methyl vinyl ether: When ethyne is passed into methyl alcohol at 433-473 K in the presence of small amount of potassium methoxide and under pressure, methyl vinyl ether is formed.
HC with Ethyne below identical to CH space plus space CH subscript 3 OH space rightwards arrow from 433 minus 473 straight K to CH subscript 3 OK of space straight H subscript 2 straight C space equals stack CH space minus space straight O minus space CH subscript 3 with Methyl space vinyl space ether below
(iv) Vinyl acetate: Acetic acid adds on a molecule of ethyne in the presence of mercury salt to form vinyl acetate. 
stack HC space identical to space CH with Ethyne below space plus space CH subscript 3 COOH space rightwards arrow with Hg to the power of 2 plus end exponent space salt on top space stack straight H subscript 2 straight C space equals space CHOOCCH subscript 3 with Vinyl space acetate below

Some More Questions From Hydrocarbons Chapter

What is alternation effect?

Arrange the following compounds in order of their increasing boiling points:
n-Pentane, n-Hexane, Ethane, 2-2-Dimethylpentane, 2-Methylpentane.

Why is light or heat necessary to initiate chlorination reaction of alkanes?

What are conformation or rotational isomers?

Out of eclipsed and staggered conformation of ethane, which is more stable?

Can you separate the two conformations of ethane?

Why are alkenes called olefins?

What is the product formed when isopropyl chloride is heated with ale. KOH solution?

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