Aminotroponimines as ligands for yttrium and lanthanide complexes

The reaction of N-isopropyl-2-(isopropylamino)troponimine [(i-Pr)(2)ATI]H, with KH in THF affords [(i-Pr)(2)ATI]K. This is a useful starting material for the preparation of the mono-, bis- and tris-substituted compounds {[(i-Pr)(2)ATI]YCl2-(THF)(2)}(2), [(i-Pr)(2)ATI](2)Y[O(2,6-t-BU2C6H3)] and [(i-Pr)(2)-ATI](3)Ln (Ln = Y, La, Sm), which can be obtained from [(i-Pr)(2)ATI]K and LnX(3) (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)(2)ATI]YCl2(THF)(2)}(2) has also been investigated by single crystal X-ray diffraction.