Four 2r-aryl-6c-phenylthian-4-ones 1bÀ1e and their 1-oxides 2bÀ2e and 1,1-dioxides 3bÀ3e have been newly synthesized. 1 H and 13 C NMR spectra have been recorded for all these compounds and 2r,6c-diphenylthian-4-one 1-oxide 2a. 13 C NMR spectrum has been recorded for the sulfone 3a of 1a. For selected compounds 1 H-1 H COSY, HSQC, HMBC, and NOESY spectra have been recorded. The vicinal proton-proton coupling constants suggest that in all these compounds, the heterocyclic ring adopts chair conformation with equatorial orientations of the aryl and phenyl groups. Proton and carbon chemical shifts suggest that in the sulfoxides, the S ¼ O bond is axial and enhances the J aa value by some special effect. The S ¼ O bond causes a significant upfield shift even on carbons without hydrogens. Significant solvent shifts also were observed.