The Insertion of Carbodiimides into Al and Ga Amido Linkages. Guanidinates and Mixed Amido Guanidinates of Aluminum and Gallium

The insertion of carbodiimides into existing metal−heteroatom bonds is an important preparative route for the
synthesis of useful ligand systems such as amidinates and guanidinates. Our interest lies in multiple insertions at
one metal center and the mechanisms of insertion and rearrangement. We have synthesized and characterized
[Me2NC(NiPr)2]nM(NMe2)3-n (n = 1, 2, 3; M = Al, Ga). We have investigated the mechanism of synthesis and
discovered a ligand transfer step that is important for the formation of the final products.