Synthese und Kristallstruktur von 1,1,1,3,3,3-Hexafluor-2-propylamino-1-thiooxamid / Synthesis and Crystal Structure of 1,1,1,3,3,3-Hexafluoro-2-propylamino-1-thiooxamide

Dithiooxamide 1 reacts with hexafluoroacetone 2 at room temperature to yield 1,1,1,3,3,3-hexafluoro-2-propylamino-1-thiooxamide 3 and sulfur. The modes of formation of the bis(trifluoromethyl)-methyl group from hexafluoroacetone, the migration of oxygen and the elimination of sulfur are not clear. Crystals of 3 are monoclinic, space group Cc, with a = 2865.3(13), b = 924.4(9), c = 702.9(6) pm, β = 93.3(7)°. The structure was refined to R = 0.067 from 614 reflections