Central atom with four substituents located at the corners of a tetrahedron
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.
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