Back بنية جزيئية رباعية السطوح Arabic Geometria molecular tetraèdrica Catalan Tetraedrická molekulová geometrie Czech Tetrahedral molekylær geometri Danish Geometría molecular tetraédrica Spanish هندسه مولکولی چهاروجهی Persian Géométrie moléculaire tétraédrique French चतुष्फलकीय अणु ज्यामिति Hindi Geometri molekul tetrahedron ID 四面体形分子構造 Japanese
| Tetrahedral molecular geometry | |
|---|---|
 | |
| Examples | CH4, MnO− 4 |
| Point group | Td |
| Coordination number | 4 |
| Bond angle(s) | ≈ 109.5° |
| μ (Polarity) | 0 |
In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. The bond angles are cos−1(−1⁄3) = 109.4712206...° ≈ 109.5° when all four substituents are the same, as in methane (CH4)[1][2] as well as its heavier analogues. Methane and other perfectly symmetrical tetrahedral molecules belong to point group Td, but most tetrahedral molecules have lower symmetry. Tetrahedral molecules can be chiral.
- ^ Alger, Nick. "Angle Between 2 Legs of a Tetrahedron". Archived from the original on 2018-10-03.
- ^ Brittin, W. E. (1945). "Valence Angle of the Tetrahedral Carbon Atom". J. Chem. Educ. 22 (3): 145. Bibcode:1945JChEd..22..145B. doi:10.1021/ed022p145.