1H, 13C and 15N NMR chemicalshifts for a variety of novelquinoxalines were determined by different 2D methods and were calculated using the GIAO DFT approach. Comparison with experimental data shows good correlations in the case of 1H, 13C and 15N chemicalshifts. Different combinations of basis sets were tested. In non‐polar solvents quinoxalines exist as dimers owing to strong hydrogen bonding