New mode of coordination for the dinitrogen ligand: Formation, bonding, and reactivity of a tantalum complex with a bridging N2 unit that is both side-on and end-on

Article abstract of DOI:10.1021/ja0041371

The reaction of a mixture of 1 equiv of PhPH₂ and 2 equiv of PhNHSiMe₂CH₂Cl with 4 equiv of BuⁿLi followed by the addition of THF generates the lithiated ligand precursor [NPN]Li₂·(THF)₂ (w