Experimental Crystal data

R factor = 0.037; wR factor = 0.098; data-to-parameter ratio = 18.8. The title compound, C21H17N3, crystallizes with the phenyl ring in the 3-position coplanar with the pyrazole ring within 4.04 (5), whereas the phenyl ring in the 5-position forms a dihedral angle of 50.22 (3) with the pyrazole ring. There is no ambiguity regarding the position of pyridine N atom, which could have exhibited disorder between the ortho positions of the ring. Related literature For pyrazole coordination, see: Trofimenko (1993); Mukherjee (2000). For our investigation of pyrazolyl-based transition metal complexes as catalysts for olefin transformations, see: Ojwach et al. (2009); Ojwach & Darkwa (2010). For bond-length data, see: Allen (2002); Bruno et al. (2002)