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Symmetry Lab › C3v › Propyne

CH₃C≡CH Propyne

Methyl group + linear C≡C–H · point group C3v · order 6

Open CH₃C≡CH in 3D →

Point group
C3v — A C3 rotation axis and 3 vertical mirror planes that contain it.
Order
6
Operations
E, 2C₃, 3σᵥ
Shape
Methyl group + linear C≡C–H
Atoms
7 (C × 3, H × 4)

Symmetry elements of CH₃C≡CH

  • C₃ — through C, perpendicular to the H₃ plane
  • σᵥ (1) — contains the C₃ axis and one C–H bond
  • σᵥ (2) — contains the C₃ axis and one C–H bond
  • σᵥ (3) — contains the C₃ axis and one C–H bond

Structure

  • C–C 1.46 Å, C≡C 1.21 Å, ≡C–H 1.06 Å
  • C–C≡C–H linear
  • sp³ and sp carbons in one molecule
Propyne (CH3CCH) — C3v symmetry elements
Propyne: symmetry elements of the C3v point group

Other C3v molecules

NH₃AmmoniaAsH₃ArsineBrO₃⁻Bromate ionClO₃⁻Chlorate ionIO₃⁻Iodate ionNCl₃Nitrogen trichlorideNF₃Nitrogen trifluoridePH₃PhosphinePCl₃Phosphorus trichloridePF₃Phosphorus trifluorideSO₃²⁻Sulfite ionXeO₃Xenon trioxide

Open in the 3D lab →  ·  All C3v molecules  ·  All point groups