IGNOU CHE 5 2018 - Explain the following:(i) Alkanes with odd number of carbon atoms

Question

Explain the following:

(i) Alkanes with odd number of carbon atoms have low melting point than those with an even number.

(ii) Wurtz reaction is not very useful when two different alkyl halides are used.

25 Jan 2018

Answer :

Word Count : 142

i. Alkane molecules with odd numbers of carbon atoms have lower intermolecular attractions and correspondingly lower melting points because alkanes with an odd number of carbon atoms pack less tightly because the methyl groups at the ends of their chains can avoid those of another chain only by increasing the distance between their chains.

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