The recently proposed MR-CI ansatz which contains terms linear in the interelectronic distances (r 1 2 ) is used to compute the potential energy curve of N 2 by means of r 1 2 -MR-ACPF. The computed spectroscopic constants with the respective errors, e.g. ΔD e (-0.2 kcal/mol), ΔR e (+1 10 - 4 9) and Δω e (+2 cm - 1 ), are found to be in excellent agreement with values derived from experimental spectra. With only a moderate computational effort, we reach accuracies which are probably out of reach of present day (traditional) CI-methods and computers.