Pi Systems Investigation by Ultraviolet and Visible Spectroscopy

Delocalized Pi Systems Investigation by Ultraviolet and Visible Spectroscopy [Pg.280]

This chapter covers an assortment of topics derived from a single concept conjugation. Conjugation refers to it overlap of three or more p orbitals on adjacent atoms in a molecule. The allyl systems are the simplest (one it bond plus a third p orbital), and conjugated dienes (two adjacent tt bonds = 4 p orbitals) are next in line. As you will see, conjugation affects the properties of the involved orbital systems, giving rise to modified electronic characteristics, stability, chemical reactivity, and spectroscopy. Introductory aspects of all of these are presented here. [Pg.280]

An introduction to the tt system created by overlap of three p orbitals. [Pg.280]

Consequences of conjugation on reaction types you ve already seen. [Pg.280]

14-9 Special Reactions of Conjugated tt Systems A new set of mechanisms for ring-forming reactions. [Pg.280]

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