What is the measurement of C – O – C bond angle in methoxymethane ?

The correct answer is Option (2) → 111.7°

In ethers the oxygen atom is sp³ hybridised: its two bond pairs and two lone pairs point roughly to the corners of a tetrahedron. In alcohols the lone pairs push the bonds together, so the C–O–H angle is slightly less than 109°28′ (108.9° in methanol). In ethers the two bulky alkyl groups repel each other, and this repulsion opens the C–O–C angle to slightly more than the tetrahedral angle.

In methoxymethane, \( \ce{CH3-O-CH3} \), the C–O–C bond angle is 111.7°.

NCERT (2026-27 edition):
Structures of Functional Groups – …