The results of the natural bond orbital (NBO) analyses also show that donor to acceptor interactions make mainly contribution to the stabilities of complexes.

• NBO分析结果也说明在相互作用体系中,电子给体轨道与电子受体轨道之间的相互作用(即电荷转移相互作用)对于维持相互作用体系的稳定都起着非常重要的作用;