(Chemical Equation Presented) Di(1-naphthy)ketals of 1,n-diols show couplet effects allied to the 1B naphthalene transition in their CD spectra. This means that they assume a conformation with a prevailing sense of twist of the naphthalene rings, imposed by the absolute configuration (AC) of the starting diols and by the nature of the R1 groups. A positive couplet for aliphatic diols is a probe of (R,R), AC while the opposite sign is found for (R,R) aromatic diols.
A New Case of Induced Helical Chirality in a Bichromophoric System: Absolute Configuration of Transparent and Flexible Diols from the Analysis of the Electronic Circular Dichroism Spectra of the Corresponding Di(1-naphthyl)ketals.
SCAFATO, Patrizia;ROSINI, Carlo
2008-01-01
Abstract
(Chemical Equation Presented) Di(1-naphthy)ketals of 1,n-diols show couplet effects allied to the 1B naphthalene transition in their CD spectra. This means that they assume a conformation with a prevailing sense of twist of the naphthalene rings, imposed by the absolute configuration (AC) of the starting diols and by the nature of the R1 groups. A positive couplet for aliphatic diols is a probe of (R,R), AC while the opposite sign is found for (R,R) aromatic diols.File in questo prodotto:
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