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Symmetry Lab4AB · ABC Chemistry

Symmetry Lab › C2v › Acetone (propanone)

(CH₃)₂CO Acetone (propanone)

Trigonal planar at C=O · point group C2v · order 4

Open (CH₃)₂CO in 3D →

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
Trigonal planar at C=O
Atoms
10 (C × 3, O, H × 6)

Symmetry elements of (CH₃)₂CO

  • C₂ — along the C=O bond
  • σᵥ (xz) — the plane of the carbon skeleton
  • σᵥ′ (yz) — perpendicular to it, along C=O

Structure

  • C=O 1.22 Å, C–C 1.52 Å
  • C–C–C 116°
  • The two methyl groups are mirror images of each other
Acetone (propanone) ((CH3)2CO) — C2v symmetry elements
Acetone (propanone): symmetry elements of the C2v point group

Other C2v molecules

ClO₂Chlorine dioxideClO₂⁻Chlorite ionH₂SHydrogen sulfideNO₂⁻Nitrite ionNO₂Nitrogen dioxideOF₂Oxygen difluorideO₃OzoneSF₂Sulfur difluorideSO₂Sulfur dioxideH₂OWaterXeO₂Xenon dioxide (as an isolated molecule)BrF₃Bromine trifluoride

Open in the 3D lab →  ·  All C2v molecules  ·  All point groups