Trichlorido{methyl[4-(methylimino)pent-2-en-2-yl]azanido-κ2N,N′}hafnium(IV)

Abstract

The title complex, [Hf(C29H41N2)Cl3], was synthesized from HfCl4 and HC[C(Me)N(iPr2C6H3)]2Li(Et2O) in toluene. The structure is isotypic with those of TiIV and ZrIV complexes reported previously [Nikiforov et al. (2007). Dalton Trans. pp. 4149–4159; Kakaliou et al. (1999). Inorg. Chem. 38, 5964–5977]. There is a crystallographic mirror plane containing the Hf atom, one chloride ligand and the central diketiminate C atom. The HfIV ion has slightly distorted square-pyramidal geometry surrounded by two N atoms from the β-diketiminate ligand and by three Cl− anions. Coordination bond lengths are Hf—N = 2.181 (3) Å, and Hf—Cl = 2.3148 (15) and 2.3727 (12) Å.