Abstract
The S absolute configuration was assigned to (+)-β-piperidino-butyrophenone by chemical correlation with S(+)-1-phenyl-3-piperidino-butane. The absolute configuration of S(+)-1-phenyl-3-piperidino-butane was obtained by comparison of its CD spectra with those of R(−)-1-phenyl-3-dimethyl-amino-butane. obtained by methylation of the (−)-1-phenyl-3-amino-butane, whose absolute configuration was already known to be R. The room and low-temperature CD spectra of these three alkylamino-derivatives are reported together with O 1 the vibronic analysis of L 1b transition of the benzyl chromophore.
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