Sodium amalgam reduction of the bis(indenyl) zirconium dihalide complexes, (eta(5)-C9H5-1-Pr-i-3-Me)(2)ZrX2 (X = Cl, Br, I), yielded the corresponding end on dinitrogen complexes, [(eta(5)-C9H5-1-Pr-i-3-Me)(2)Zr(NaX)](2)(mu(2), eta(1), eta(1)-N-2), with inclusion of 1 equiv of salt per zirconocene. The solid state structures of the chloro and iodo congeners establish short Zr=N and elongated N-N bonds, consistent with modest to strong activation of the coordinated dinitrogen molecule. Exposure of the N-2 compounds to 1 atm of dihydrogen resulted in rapid N-H bond formation to yield a hydrido zirconocene hydrazido compound concomitant with salt elimination. These studies establish a new structural type of zirconocene dinitrogen complex and demonstrate that side-on coordination of the N-2 ligand in the ground state is not a prerequisite for dinitrogen hydrogenation.