The u.v. absorption data for a series of cyclic and acyclic linear conjugated dienamines are reported. The morpholine and pyrrolidine groups in conjugation with the double bond system are shown to exert an auxochromic shift of +50 and +63 nm, respectively, and the effect of alkyl substituents is shown to vary with their position in the carbon chain (i.e.α, β, γ, or δ to the amino-group).
N. F. Firrell, P. W. Hickmott and B. J. Hopkins, J. Chem. Soc. B, 1971, 351 DOI: 10.1039/J29710000351
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