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Dipropargyldiphenylmetane, C19H16, crystallizes in a monoclinic space group C2/c with a = 11304(3), b = 20.799(5), c = 6.622(2)Å, β = 112.8(3)°, Z = 4, V = 1435.3Å3, F(000) = 520, Dc = 1.14g·cm-3 and μ = 0.32 cm-1. The structure was solved by direct methods and all non-H atoms were identified in the E-map. The final refinement gave R = 0.055 from 1328 unique observed reflections with I ≥ -1.0 σ(I). The molecule belongs to the point group C2 of Symmetry by possessing the 2-fold axis which coincides witeh the crystallographic symmetry axis in the unit cell. The linear propargyl moiety is nearly perpendicular(94.2)° to the molecular plane of the benzene ring. The internal angle of methane carbon atoms in 108.1(1)°, bonding to the benzene and the propargyl moiety with the bond lengths of 1.530(2) and 1.560(2)Å, respectively. The shortest contant between the molecules is 3.538(2)Å between C(9) and C(9) (-x, y, -1/2-z).
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