In gaseous triethylamine, the C–N–C bond angle is degree.

Question

In gaseous triethylamine, the C–N–C bond angle is  degree.

Canvas Classes · Accepted Answer

Triethylamine :

Step 1 — Hybridization of N:
- N has 3 bonds (to 3 C atoms) + 1 lone pair
- Total electron pairs = 4 → sp³ hybridization

Step 2 — Bond angle:
- Pure sp³ gives 109.5°
- The lone pair repels the bonding pairs, compressing the C–N–C angle
- However, the ethyl groups are larger than H → steric effects push the bond angle slightly above the NH₃ value (107°)
- C–N–C bond angle in triethylamine ≈ 108°

Answer: 108

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