- Point group
- C2v — A C2 rotation axis and 2 vertical mirror planes that contain it.
- Order
- 4
- Operations
- E, C₂, σᵥ(xz), σᵥ′(yz)
- Shape
- Planar five-membered ring
- Atoms
- 9 (O, C × 4, H × 4)
Symmetry elements of C₄H₄O
- C₂ — in the plane, through the O atom
- σᵥ (xz) — the plane of the molecule
- σᵥ′ (yz) — perpendicular to the molecule, through O
Structure
- C–O 1.36 Å, C–C 1.36–1.43 Å
- Planar
- One O lone pair in the π system
