Über (Pentafluorphenyl)thiocarbonyl‐Verbindungen sowie die Synthese und Struktur von (Pentafluorphenyl)phenylsulfin

(Pentafluorophenyl)thiocarbonyl Compounds, Synthesis and Structure of Pentafluorophenyl Phenyl Sulfine The C6F5‐substituted thiocarbonyls C6F5–CS–R [R=C6H5 (2), CH3 (4)] are synthesized from the corresponding carbonyl compounds by using in situ formed B2S3. The corresponding highly reactive thioaldehyde (R=H) is trapped with anthracene as Diels‐Alder adduct 7. By oxidation of 2 sulfine 10 is generated which dimerizes in the crystal lattice. An X‐ray crystal structure determination of a trithiaphosphinane 9 was carried out for the first time. The bis‐para‐substituted compound 12 is obtained from perfluorobenzophenone and hydrazine hydrate in a fast reaction.