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• W1978405540 endingPage "1154" @default.
• W1978405540 startingPage "1143" @default.
• W1978405540 abstract "The CD spectra of 13 crystalline aryl benzyl sulfoxides 1a-m with various substituents on the two aromatic rings were recorded in solution and in the solid state. Solution CD spectra were very homogeneous along the series, consisting in most cases of a couplet-like feature in the 200-300 nm region. The red-shifted component of the couplet, corresponding to the sulfoxide-centered n-pi* transition, is always positive for (R) absolute configuration in accordance with Mislow's rule. The presence of a strong electron-withdrawing substituent on the phenyl ring (nitro or ester group) alters the shape of the CD spectrum. CD calculations using the TDDFT method were run for eight representative compounds using DFT-optimized geometries. In all cases, calculated spectra were in very good agreement with experimental ones and allowed for rationalization of the diverse spectral behaviors. It is demonstrated that TDDFT//DFT calculations represent a reliable option for assigning the absolute configuration of this class of compounds whenever crystals suitable for X-ray are not available. Solid-state CD spectra recorded with the KCl pellet technique were in some cases in agreement with those in solution. However, in other cases new and strong CD signals appeared which were interpreted as being due to intermolecular couplings in the crystals." @default.
• W1978405540 created "2016-06-24" @default.
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• W1978405540 date "2010-01-25" @default.
• W1978405540 modified "2023-10-11" @default.
• W1978405540 title "Systematic Investigation of CD Spectra of Aryl Benzyl Sulfoxides Interpreted by Means of TDDFT Calculations" @default.
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• W1978405540 doi "https://doi.org/10.1021/jo902363c" @default.
• W1978405540 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20099930" @default.
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