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Q43.

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Organic Chemistry
Found in: Page 377

Short Answer

Question: Explain the observed trend in the melting points of the following three isomeric alcohols:

Answer

The greater symmetry in makes it has a larger melting point than .

See the step by step solution

Step by Step Solution

Step-by-Step SolutionStep 1: Melting point

The point at which a particular substance transforms from a solid state to a liquid state is the melting point. Numerous factors influence the melting point, and one among them is the pressure.

 Step 2: Isomeric alcohols

Isomeric alcohols are alcohols comprising equivalent molecular formulas but differ in their spatial arrangement. An example of isomeric alcohol is 1-butanol and 2-butanol.

Step 3: Observed trend in the melting points of isomeric alcohols

The melting point of a particular compound is directly proportional to the surface area and symmetry. An increase in surface area or symmetry increases the melting point of the particular compound.

A branched polymer has a lesser surface area in comparison to unbranched primary alcohol. is branched primary alcohol and is an unbranched primary alcohol.

Hence, the melting point of is higher than .

Because of the greater symmetry in , it has a larger melting point than and .

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