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Symmetry Lab4AB · ABC Chemistry

Symmetry Lab › C3h › Phloroglucinol (benzene-1,3,5-triol)

C₆H₃(OH)₃ Phloroglucinol (benzene-1,3,5-triol)

Planar, propeller-like OH groups · point group C3h · order 6

Open C₆H₃(OH)₃ in 3D →

Point group
C3h — A C3 rotation axis and a horizontal mirror plane perpendicular to it.
Order
6
Operations
E, C₃, C₃², σh, S₃, S₃⁵
Shape
Planar, propeller-like OH groups
Atoms
15 (C × 6, O × 3, H × 6)

Symmetry elements of C₆H₃(OH)₃

  • C₃ — perpendicular to the ring
  • σh — the plane of the molecule
  • S₃ — rotate 120°, then reflect in σh

Structure

  • C–O 1.36 Å, O–H 0.97 Å
  • The three OH all turn the same way
  • Like boric acid: C₃ and σh, but no C₂ or σᵥ
Phloroglucinol (benzene-1,3,5-triol) (C6H3(OH)3) — C3h symmetry elements
Phloroglucinol (benzene-1,3,5-triol): symmetry elements of the C3h point group

Other C3h molecules

B(OH)₃Boric acid

Open in the 3D lab →  ·  All C3h molecules  ·  All point groups