The reactions of titanium oxide molecules with dinitrogen have been studied by matrix isolation infrared spectroscopy. The titanium monoxide molecule reacts with dinitrogen to form the TiO(N(2))(x) (x = 1-4) complexes spontaneously on annealing in solid neon. The TiO(eta(1)-NN) complex is end-on bonded and was predicted to have a (3)A '' ground state arising from the (3)Delta ground state of TiO. Argon doping experiments indicate that TiO(eta(1) -NN) is able to form complexes with one or more argon atoms. Argon atom coordination induces a large red-shift of the N-N stretching frequency. The TiO(eta(2)-N(2))(2) complex was characterized to have C(2v),, symmetry, in which both the N(2) ligands are side-on bonded to the titanium metal center. The tridinitrogen complex TiO(eta(1)-NN)(3) most likely has C(3v), symmetry with three end-on bonded N(2) ligands. The TiO-(eta(1)-NN)(4) complex was determined to have a C(4v) structure with four equivalent end-on bonded N(2) ligands. In addition, evidence is also presented for the formation of the TiO(2)(eta(1)-NN)(x) (x = 1-4) complexes, which were predicted to be end-on bonded.