In which of the following,intramolecular hydr | vedclass

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(B) Intramolecular hydrogen bonding occurs when a hydrogen atom is bonded to an electronegative atom and is simultaneously attracted to another electr

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Catechol

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(B) Intramolecular hydrogen bonding occurs when a hydrogen atom is bonded to an electronegative atom and is simultaneously attracted to another electronegative atom within the same molecule.In $o$-Cresol ($2$-methylphenol),the hydroxyl $(-OH)$ group and the methyl $(-CH_3)$ group are adjacent to each other. However,the hydrogen atom of the $-OH$ group forms an intramolecular hydrogen bond with the oxygen atom of the same $-OH$ group in some configurations,but more specifically,in $o$-nitrophenol or similar ortho-substituted phenols,it is very common. Among the given options,$o$-Cresol allows for the proximity of the $-OH$ group to the ortho-position,facilitating intramolecular interactions compared to the meta (Resorcinol) or para (Quinol) isomers where only intermolecular hydrogen bonding is possible.Catechol ($1,2$-dihydroxybenzene) also exhibits intramolecular hydrogen bonding between the two adjacent $-OH$ groups.

In which of the following,intramolecular hydrogen bonding is present?

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