S---S and S---O interactions in some 4-thiazoline derivatives

Structural data have been obtained by X-ray crystallography for three 4-thiazoline derivatives, 2-benzoylimino-3, 4-diphenyl-4-thiazoline, 3-methyl-4-phenyl-2-thiobenzoylimino-4-thiazoline, and 3,4-diphenyl-4-thiazolin-2-ylidene thioacetophenone. In these compounds the separations between the sulphur atoms of the thiazoline rings and the adjacent oxygen or sulphur atoms of the carbonyl or thiocarbonyl groups approximate to the Huggins “constant energy” distances, suggesting that there is little or no bonding between them.