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Related Concept Videos

Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
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.

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Thermoelectrics: Half-full glasses

Cronin B Vining1

  • 1Cronin B. Vining is at ZT Services, 2203 Johns Circle, Auburn, Alabama 36830-7113, USA. nature@zts.com.

Nature Materials
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PubMed
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No abstract available in PubMed .

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