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The principal structural parameters rh1(∠h1) determined by GED are (bond lengths in Angstroms and bond angles in degrees with 3σ in parentheses): r(C C)=1.392(4), r(C?C)=1.512(4), r(C?F)av=1.346(2), ∠C–C(CF3)– C=120.9(2), ∠C–C(H)–C=119.1(2), ∠(C–C–F)av=111.6(2). The structure of the carbon ring deviates from a regular hexagon due to the σ-electronegative effect of the CF3 groups. The geometric parameters of the trifluoromethyl groups deviate considerably from regular tetrahedron arrangement[1].

[1] Inna N. Kolesnikova . “Molecular structure and conformation of 1,3,5-tris(trifluoromethyl)-benzene as studied by gas-phase electron diffraction and quantum chemical calculations.” Journal of Molecular Structure 1074 (2014): Pages 196-200.