Fig. 5. Isolines of dissected NICSzz for B2N2 and B5N5clusters.
Isolines of B5N5NICScore,zz, have not negligible long range diatropic values according to the isosurface of NICSzz previously shown, where the diatropicity is located nitrogen atoms. Contributions of σ-electrons present short-range paratropic values in the center of molecular plane as seen in the NICSzz isosurface of B5N5. The contributions of π-electrons show long-range pattern that allows us to say that this cluster is weakly π-aromatic in agreement with RCS values.