Stereoelectronic effects in N-C-S and N-N-C systems: experimental and ab initio AIM study

Ivan S Bushmarinov1, Mikhail Yu Antipin, Vnira R Akhmetova

  • 1A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991, Vavilov Str., 28, Moscow, Russia.

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Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.