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

(Pentafluorophenyl)thiocarbonyl Compounds, Synthesis and Structure of Pentafluorophenyl Phenyl Sulfine The C 6 F 5 ‐substituted thiocarbonyls C 6 F 5 –CS–R [R=C 6 H 5 ( 2 ), CH 3 ( 4 )] are synthesized from the corresponding carbonyl compounds by using in situ formed B 2 S 3 . 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.