Fig. 1. Synthesis of ClY(NHAr*)2 (1) (top) and (bottom) the structure of 1 from single-crystal X-ray diffraction (thermal ellipsoids drawn at 50%), where Ar is 2,4,6-(iPr)3C6H2. Hydrogen atoms on carbon and solvent molecules (2 n-hexane) are not shown for clarity. The η6-arene (red) is discussed as Ar1 in the text. Some selected structural parameters: Y–N distances: 2.249(2) Å, 2.210(2) Å. Y–Ar1(centroid): 2.493(3) Å.
