Aminotroponimines as Ligands for Yttrium and Lanthanide Complexes

The reaction of N‐isopropyl‐2‐(isopropylamino)troponimine, [(i‐Pr)2ATI]H, with KH in THF affords [(i‐Pr)2ATI]K. This is a useful starting material for the preparation of the mono‐, bis‐ and tris‐substituted compounds [[i‐Pr)2ATI]YCl2‐(THF)2}2, [(i‐Pr)2ATI2Y[O(2,6,t‐Bu2C6H3)] and [(i‐Pr)2‐ATI]3Ln (Ln = Y, La, Sm), which can be obtained from ([i‐Pr)2ATI]K and LnX3 and LnX3 (X = Cl, I), or Y[O(2,6‐t‐BuC6H3)]3. All compounds have been characterized by spectroscopic methods. The monosubstituted yttrium complex {[(i‐Pr)2ATI]YCl2(THF)2}2 has also been investigated by single crystal X‐ray diffraction.