In this study, some novel thiosubstituted butenyne (3a-d, 7b, 15b), butadiene (4a-b, 4d, 5a, 5c, 6b, 8e, 9c, 10b, 16b, 18e) and [3]cumulene (11a-b with isomer 3a-b, 12a with isomer 13a, 14b, 17e) compounds were synthesized from the reaction of 2H-pentachloro-1,3-butadiene with thiols. The new compounds were characterized by elemental analysis, mass spectrometry, UV-vis, IR, 1 H NMR, NMR ( 13 C or APT) spectroscopy.

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The reaction of the pentachlorobutadiene (I) with several thiols yielding butenynes and butadienes and reaction of the products to cumulenes, e.g. (VI), are described.