Fulvenes and Thermochromic Ethylenes. XXXIII. 1 Polycyclic Derivatives of Heptafulvene

ED Bergmann, R Ikan

Index: Bergmann,E.D.; Ikan,R. Journal of Organic Chemistry, 1963 , vol. 28, p. 3341 - 3343

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Citation Number: 3

Abstract

It has been calculated2a, b that anellation of benzene rings to the system of heptafulvene (I) will first produce a hypsochromic effect which will change into a bathochromic one upon addition of even more rings. Furthermore, phenyl substitution at the exocyclic carbon atom of I will, on the one hand, increase the polarity of the semicyclic double bond, and, on the other hand, cause a hypsochromic shift. As the experimental results as yet have not borne out ...