12.3 The stability of the allyl radical (烯丙基自由基的稳定性) 12.3A Molecular orbital description of the allyl radical H2C-ATWHH2c 小H12.3 The stability of the allyl radical (烯丙基自由基的稳定性） 12.3A Molecular orbital description of the allyl radical C H C H H H H2C sp 2 C H H H2C sp 2 sp 2 sp 2 H H2 C H C C H H