The molecule of the title compound, C(31)H(30)N(2), contains a single intramolecular hydrogen bond, in contrast with the related N-methyl compound which exists as hydrogen-bonded dimers in the solid state [Cortright, Huffman, Yoder, Coalter & Johnston (2004). Organometallics, 23, 2238-2250]. Application of the density functional theory programs CASTEP and DMol(3) allows accurate assignment of the location of the H atoms in the structure.