Symmetry Lab › D3h › Cyclopropane
C₃H₆ Cyclopropane
Planar three-membered ring · point group D3h · order 12
- Point group
- D3h — A C3 principal axis, 3 perpendicular C2 axes and a horizontal mirror plane; these also give 3 vertical planes.
- Order
- 12
- Operations
- E, 2C₃, 3C₂, σh, 2S₃, 3σᵥ
- Shape
- Planar three-membered ring
- Atoms
- 9 (C × 3, H × 6)
Symmetry elements of C₃H₆
- C₃ — perpendicular to the ring
- C₂ (1) — in the ring plane, through one carbon
- C₂ (2) — in the ring plane, through one carbon
- C₂ (3) — in the ring plane, through one carbon
- σh — the plane of the ring
- σᵥ (1) — contains the C₃ axis and one CH₂ group
- σᵥ (2) — contains the C₃ axis and one CH₂ group
- σᵥ (3) — contains the C₃ axis and one CH₂ group
- S₃ — rotate 120°, then reflect in σh
Structure
- C–C 1.512 Å, C–H 1.083 Å
- C–C–C 60° (ring strain), H–C–H 114.5°
- Bent "banana" C–C bonds
