Which of the following molccules has almosr ncgligible rcndcncy ro form hydrogcn bonkls? (a) NII

step 1 So here the question is which molecule is having least tendency to form hydrogen bond? So, HI ha

Which of the following molccules has almosr ncgligible...

Key Concepts

Molecular Polarity

Molecular polarity describes the uneven distribution of electron density within a molecule, creating regions of partial positive and partial negative charge. This polarity is crucial for hydrogen bonding since only molecules with sufficient polarity will have distinct positive and negative sites that can interact strongly with each other through hydrogen bonds.

Hydrogen Bond Donor and Acceptor

A hydrogen bond donor is a molecule that has a hydrogen atom bonded to a highly electronegative atom, making the hydrogen partially positive and capable of interacting with an electron-rich site. Conversely, a hydrogen bond acceptor is typically an electronegative atom with lone electron pairs that can accommodate the positively charged hydrogen. The presence or absence of effective donors and acceptors in a molecule directly determines its ability to form hydrogen bonds.

Hydrogen Bonding

Hydrogen bonding is a specific type of intermolecular attraction where a hydrogen atom attached to a highly electronegative atom (such as nitrogen, oxygen, or fluorine) interacts with a lone pair of electrons on another electronegative atom in a nearby molecule. This interaction is stronger than van der Waals forces but weaker than covalent bonds, and its strength is reliant on the polarity of the bond between hydrogen and its electronegative partner.

Electronegativity

Electronegativity is the tendency of an atom to attract electrons in a chemical bond. A high electronegativity difference between hydrogen and the atom it is bonded to creates a highly polar bond, making the hydrogen atom partially positive and more capable of attracting electron pairs from other electronegative atoms, thereby facilitating hydrogen bonding.

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