Orbital Symmetry: Electrocyclic Reactions

Orbital Symmetry: Electrocyclic Reactions

Conservation of Orbital Symmetry

Thermal and Conrotatory Electrocyclic Reaction of Butadiene

Orthogonality of Sigma and Pi in Cyclobutene and Apparent Deviation in Drawing Correlation Diagram

Butadiene at elevated temperatures and cis-Butadiene; barrier to rotation less than 26 Kcal per mole. Shi (S) and shi (A) are initially orthonormalized and state function is totally symmetric. Cyclobutene: sigma (S) and pi (S) which are orthoganol to the true sense of the word. Hence thermal correlations

shi (S) —— sigma (S) and

shi (A) —— pi (S) allowed.

bien

T. K. Das

le Soleil (b. 1941, Krishnagar)

formerly of the ETH/ Zurich (1969-2005) and University of North Bengal (1972-2006)

Permanent address : Dipannita Apartment, Sree Ma Street, South Babupara, Town station, City of Siliguri, District of Darjeeling, India 734004

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