Crystal structures of 3,4,5-tri­phenyl­toluene and 3,4,5-tri­phenyl­benzyl bromide

The crystal structures of 3,4,5-tri­phenyl­toluene and 3,4,5-tri­phenyl­benzyl bromide are described, the former of which crystallizes in two polymorphic forms.

This article describes the crystal structures of 3,4,5-tri­phenyl­toluene, C₂₅H₂₀ (1), and 3,4,5-tri­phenyl­benzyl bromide, C₂₅H₁₉Br (2), which represent two inter­mediates of a multistep synthesis of a phenyl­acetic acid derivative. Compound 1 crystallizes from methanol in two polymorphic forms, with the space groups P2/n (1a) and P2₁/c (1b). In both cases, van der Waals forces significantly contribute to the cohesion of the crystal structure and the two polymorphs are characterized by similar modes of mol­ecular inter­connection. Compound 2 crystallizes from n-hexane in the space group P1, showing a similar pattern of noncovalent inter­actions to 1a and 1b. In all reported structures, the aromatic framework of the mol­ecules adopts a paddlewheel-like conformation.