Question

Which of the following compounds has intramolecular hydrogen bonding in it?

• A. \(NH_3\)
• B. \(H_20\)
• C.
• D.

Answer 1

The Correct Option is B

To determine which of the given compounds has intramolecular hydrogen bonding, we need to understand what intramolecular hydrogen bonding is. It occurs when a hydrogen atom is attracted to an electronegative atom like oxygen, nitrogen, or fluorine within the same molecule, forming a hydrogen bond within the molecule.

Let's analyze each option:

1. \(NH_3\): Ammonia has hydrogen bonding, but it is intermolecular rather than intramolecular because the hydrogen atoms are not bonded within the same molecule but between different molecules. Hence, \(NH_3\) does not exhibit intramolecular hydrogen bonding.
2. \(H_2O\): Water primarily exhibits intermolecular hydrogen bonding, where hydrogen atoms bond with electronegative oxygen atoms from adjacent water molecules. This is not intramolecular hydrogen bonding.
3. The compound represented by the image with the alt text "OH-NO2" is typically a nitro-phenol, where an -OH and a -NO2 group are present on the same benzene ring. This group configuration allows for hydrogen bonding within the same molecule because the -OH group can donate a hydrogen to the oxygen of the nitro group.
4. The second image is similar to the third option, likely indicating another configuration of nitrophenol. Intramolecular hydrogen bonding is also possible in this case between the hydrogen of the -OH group and the oxygen in the -NO2 group if they are ortho-oriented (adjacent to each other).

Therefore, the compounds that show potential for intramolecular hydrogen bonding are the images with alt text "OH-NO2". In contrast, \(H_2O\) does not exhibit intramolecular hydrogen bonding; instead, it displays intermolecular hydrogen bonding.

Conclusion: Neither \(NH_3\) nor \(H_2O\) have intramolecular hydrogen bonds based on the given options. The correct examples are the structural images of nitrophenol.