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Non-merohedrally twinned crystals of N,N′-bis(3-methyl­phenyl)-N,N′-di­phenyl-1,1′-bi­phenyl-4,4′-di­amine: an excellent tri­phenyl­amine-based hole transporter

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N,N′-Bis(3-methyl­phenyl)-N,N′-di­phenyl-1,1′-bi­phenyl-4,4′-di­amine (TPD), C38H32N2, crystallizes in the monoclinic space group P21 with a pseudo-orthogonal lattice, rather than the previously reported orthorhombic space group P212121 [Kennedy, Smith, Tackley, David, Shankland, Brown & Teat (2002). J. Mater. Chem.12, 168–172]. The asymmetric unit consists of two independent mol­ecules, A and B, which are arranged along the [100] direction to form vertical layers of alternately stacked A and B mol­ecules. Molecule A shows a great deal of rotational movement in the four terminal aryl rings, resulting in two disordered tolyl groups split over two sites, while mol­ecule B exhibits an almost cis configuration of the two terminal tolyl groups with respect to these ring planes.
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Document Type: Research Article

Publication date: 2004-06-01

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