Ultraviolet Spectra, Circular Dichroism, and Optical Rotatory Dispersion

Ultraviolet Spectra, Circular Dichroism, and Optical Rotatory Dispersion.— 

Routine u.v. studies of the effects of sulphur-containing groups on the spectral absorption characteristics of substituted benzenes (references are collected at the end of this section) continue along familiar lines (see Vol. 5, p. 4). A model for the thioindigo chromophore, i.e, MeCOC(SMe)=C(SMe)COMe, has been shown by X-ray studies to be non-planar, as a result of repulsion between methyl groups. 

Studies of the circular dichroism of acyl derivatives of thioglycerols and of 2- or 3-phenylalkyl isothiocyanates constitute extensions of earlier work. 

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