众所周知,NO_2是角形分子,具有顺磁性.但是,对分子中单电子是在中心原子N的未成键的σ轨道上还是在大π键轨道上至今仍然没有统一的看法.大多数的教材和文献上目前比较一致的看法是,N原子采取sp~2杂化或介于sp杂化和sp~2杂化之间,分子中有二个σ键和一个П_3~3大π键,单电子占据大π键轨道 It is well-known that NO 2 is an angular molecule with paramagnetic properties, but there is still no unified opinion on whether a single electron in a molecule exists on the unbonded σ orbit of the central atom N or on a large π -bonnet. Most textbooks and documents On the current more consistent view is that the N atom to sp ~ 2 hybrid or between sp hybridization and sp ~ 2 hybrid between molecules in the two σ bond and a π 3 ~ 3 π bond, a single electron occupy Big π bond track