This third volume of the Supplement Series for "Perfluorohalogenoorgano Compounds of Main Group Elements" completes the examination of Main Group VI elements. It addresses sulfur(IV) compounds, sulfonic acids, sulfonic anhydrides, sulfonates, sulfur(VI) oxides, sulfonyl nitrogen compounds, sulfonyl halides, sulfur(VI) halides, and compounds of selenium and tellurium. Additionally, it includes perfluorohalogenoorgano compounds of iodine in oxidation states greater than one and features a formula index for Supplement Volumes 1, 2, and 3. The series will conclude with nitrogen compounds. The structure and selection of the material align with the Main Volumes, incorporating both newly synthesized compounds and previously referenced ones with new data. Presentation conventions are outlined in the Main Volumes' prefaces. Notably, chemical shifts downfield from the standard are now designated as positive, in line with IUPAC recommendations. Acknowledgments are extended to Prof. Dr. Dr. h. c. E. Fluck and his team for their collaboration, as well as to colleagues who contributed reprints and patents.
