A New and Versatile Diamide-Diamine Donor Ligand Set in Early Transition Metal Chemistry.

Straightforward, multigram synthesis of the new diamide–diamine proligand H2N2NN′ [N2NN′ = (2-NC5H4)CH2N(CH2CH2 NSiMe3)2] is described along with a preliminary survey of the five- and six-coordinate, neutral and cationic, single- and multiply-bonded complexes of groups 3, 4 and 5 that it can support; the related bis(alkoxide)–diamine proligand H2O2NN′ is also described where H2O2NN′ = (2-NC5H4)CH2N(CH2CMe2 OH)2.