A new and versatile diamide-diamine donor ligand set in early transition metal chemistry

Straightforward, multigram synthesis of the new diamide-diamine proligand H 2N2NN' [N2NN' = (2-NC5H4)CH2N(CH2CH2NSiMe3)(2)] is described along with a p reliminary survey of the five- and six-coordinate, neutral and cationic, si ngle- and multiply-bonded complexes of groups 3, 4 and 5 that it can suppor t; the related bis(alkoxide)-diamine proligand H2O2NN' is also described wh ere H2O2NN' = (2-NC5H4)CH2N(CH2CMe2OH)(2).