Dinitrogen Functionalization Affording Chromium Hydrazido Complex

A series of trinuclear and dinuclear Cr(I)–N2 complexes bearing cyclopentadienyl-phosphine ligands were synthesized and characterized. Further reduction of the Cr(I)–N2 complexes generated anionic Cr(0)–N2 complexes, which could react with Me3SiCl to afford the first chromium hydrazido complex from N2 functionalization. These complexes were found to be effective catalysts for the transformation of N2 into N(SiMe3)3.