Question

multiple choice 2 points based on the structure below, what is the value for the h - n - ch₃ bond angle? 90° 109° 120° 60°

Explanation:

Step1: Identify N - atom hybridization

The nitrogen atom in the given structure has three bonding groups (to H, CH₃ and the carbon - carbonyl group) and one lone pair. The hybridization of nitrogen is sp³.

Step2: Recall bond - angle for sp³ hybridization

For sp³ hybridized atoms with four electron - pairs (including bonding and non - bonding pairs), the ideal bond angle is 109.5°. Due to the repulsion of the lone pair, the bond angles in molecules with sp³ hybridized central atoms and one or more lone pairs are slightly less than 109.5°, and 109° is a reasonable approximation among the given options.

Answer:

109°