Matrix isolation infrared spectra and quantum chemical calculations of the (NN)(x)CrO and (NN)(x)CrO2 (x = 1, 2) molecules are reported. These species were prepared and isolated in solid argon by three different methods: co-condensation of the CrO and CrO2 molecules generated from laser ablation of CrO3 with N-2/Ar; reactions of laser-ablated Cr atoms with O-2/N-2/Ar mixtures, and reactions of laser-ablated Cr atoms with N2O/Ar. The product absorptions were identified by isotopic substitutions and density functional theoretical calculations. Evidence is also Presented for the (NN)(O-2)CrO2 molecule.