Chapter 4.Alkynes and Dienes
Chapter 4. Alkynes and Dienes
1 Alkynes4.1 Structure ofAcetyleneporbitalssp hybrid orbitalsp hybrid orbital
1 Alkynes 4.1 Structure of Acetylene p orbitals sp hybrid orbital sp hybrid orbital
Group stateExcitedstatesp-Hybridization2p/2p2p2s↑2s1s Il11s1sPromotionofelectronHybridizationAprocess forobtaining sp-hybrid carbon atoms
Promotion of electron A process for obtaining sp-hybrid carbon atoms Hybridization 2p 2s 1s Group state 1s 2p 2s Excited state 2p 2s 1s sp-Hybridization
HH(b)a
(a) (b)
0.120nmH-CH-0.106nm键长/nm键长/nmsp3SC-HC-C0.1540.1102sp2SC=C0.1340.1086C-HSCCsp0.1200.1059C-H
H C C H 0.120nm 0.106nm