CCXXXV.—cis-trans-Isomerism of disulphoxides

The crystal and molecular structure of meso-ethane-1,2-bis(methyl sulphoxide), with some results from neglect of a small anomalous dispersion signal in a centrosymmetric case

“…The two forms of ethane-l,2-bis(methyl sulphoxide) were prepared as directed by Bell & Bennett (1927). Repeated and alternating crystallizations from acetone and ethyl acetate were necessary to obtain pure samples.…”

“…Some years ago Bruun, Hafnor & Sorensen (1950) reported the presence in sulphate turpentine of ethane° 1,2-bis(methyl sulphoxide), presumably formed by the autoxidation of ethane-l,2-bis(methyl sulphide). The bis(sulphoxide) was later prepared in both a and fl forms according to the procedure of Bell & Bennett (1927). These authors recognized that one of the crystal forms would be a meso form, the other racemic, but there was no means at that time to distinguish between the two.…”

“…The bis(sulphoxide) was later prepared in both a and fl forms according to the procedure of Bell & Bennett (1927). These authors recognized that one of the crystal forms would be a meso form, the other racemic, but there was no means at that time to distinguish between the two.…”

The crystal structure of beta dithiane disulphoxide

“…The dithiane disulphoxides were prepared by the method of Bell & Bennett (1927), who considered the more soluble and lower melting form (the Beta isomer) to be the cis form. This isomer was examined first.…”

The Chemistry of C2-Symmetric Bis(sulfoxides): A New Approach in Asymmetric Synthesis

“…The first mentions of bis(sulfoxides) in organic chemistry date from the middle of the nineteenth century,1 followed in the 1920s by the exploratory studies of Bell and Bennett on the stereoisomerism of these compounds 2. After decades of sporadic reports, bis(sulfoxides) have enjoyed new interests from the synthetic community for the last ten years, especially C 2 ‐symmetric derivatives for their intrinsic advantages in asymmetric synthesis 3.…”