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The resonance effect is defined as 'the ...

The resonance effect is defined as 'the polarity produced in the molecule by the interaction of two `pi`-bonds or between a `pi`-bond and lone pair of electrons present on an adjacentatom.' The effect is transmitted through the chain.
In positive resonance effect, the transfer of electrons is away from an atom or substituent group attached to the conjugated system. This electron displacement makes certain positions in the molecule of high electron densities. In negative resonance effect, the transfer of electrons is towards the atom or substituent group attached to the conjugated system.
What is the IUPAC name for :

A

5-isobutyl-2-methylheptane

B

4-ethyl-2, 7-dimethylocatne

C

5- ehtyl-2, 7-dimethyloctane

D

2-methyl-5-(2-methylpropyl) heptane.

Text Solution

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The correct Answer is:
B
`{:(overset(1)(C)H_(3)-overset(2)(C)H-overset(3)(C)H_(2)-overset(4)(C)H-overset(5)(C)H_(2)-overset(6)(C)H_(2)-overset(7)(C)H-overset(8)(C)H_(3)),(" |"" |"" |"),(" "CH_(3)" "CH_(2)" "CH_(3)),(" |"),(" "CH_(3)):}`
4-ethyl-2, 7-dimethyloctane.
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