2,4,5-Tris(biphenyl-2-yl)-1-bromobenzene

In the title compound, C42H29Br, the dihedral angles between the central benzene ring and the three attached benzene rings are very similar, lying in the range 52.65 (6)–57.20 (7)°. Of the dihedral angles between the rings of the o-biphenyl substituents, two are similar [46.34 (7) and 47.35 (7)°], while the other differs significantly [64.17 (7)°]. In the crystal, molecules are linked into centrosymmetric dimers by two weak C—H⋯π interactions.

In the title compound, C 42 H 29 Br, the dihedral angles between the central benzene ring and the three attached benzene rings are very similar, lying in the range 52.65 (6)-57.20 (7) . Of the dihedral angles between the rings of the o-biphenyl substituents, two are similar [46.34 (7) and 47.35 (7) ], while the other differs significantly [64.17 (7) ]. In the crystal, molecules are linked into centrosymmetric dimers by two weak C-HÁ Á Á interactions.

Comment
The Suzuki-Miyaura reaction, also called Suzuki coupling, is a particular type of cross-coupling reaction that involves the coupling of an organometallic boron species, R-B, with an organic electrophile, R'-X where X is an organic halide (Br in the presented case), in the presence of a Pd catalyst and a base, resulting in the formation of a new C-C bond, (Miyaura & Suzuki, 1995) and (Liu et al., 2006).
The title compound can thus be used as a useful electrophile for insertion of a new substituent on the 1 position of the central ring and it was prepared as a part of the ongoing research concerning about the importance of the transmetallation step in the overall efficiency of the cross-coupling reaction and about the role of the intramolecular Pd···π and π ··· π aromatic interactions on the stabilization of Pd(II) complexes, that contributes to the selectivity of the Suzuki-Miyaura cross-coupling reaction in the synthesis of arylnaphthalenes and polypnenylenes, (Lima et al., 2011).
The molecule, Fig.1, presents a high degree of torsion between phenyl rings probably due to the steric hindrance promoted by the ortho-substitution of the 2-biphenylyl substituents on the central benzene ring. The dihedral angles between the mean plane of the central phenyl ring containing atoms C1 and the mean planes of the phenyl rings attached to atoms C2, C4 and C5 are respectively, 57.20 (7)°, 56.88 (6)° and 52.65 (6)°. The dihedral angle between the phenyl rings containing atoms C21 and C221 is 64.17 (7)°, that between the mean plane of the phenyl rings C containing atoms C41 and C421 is 47.35 (7)°, that between the phenyl rings C containing atoms C51 and C521 is 46.34 (7)° and that between the phenyl rings containing atoms C41 and C51 is 52.21 (7)°.
The molecules are linked to form a centrosymmetric dimer by two weak C-H···π interactions, Table 1 and Fig.2. There are no π···π interactions.