Reactions of laser-ablated Ti, Zr, and Hf atoms with N-2 in excess argon and excess dinitrogen have produced the MN and (N-2)(x)MN molecules in addition to M(mu-N)(2)M with no dinitrogen bond. Evidence is presented for simple eta(1)-N-2 and higher complexes for each metal. The observation of cyclic Ti(N-2) and Zr(N-2) molecules with N-N stretching frequencies at 1125.9 and 1022.8 cm(-1), respectively, indicate significant activation of the dinitrogen bond. The identification of product molecules is based on isotopic substitution and the results of density functional theory frequency calculations.