UV-irradiation of the thiocarbonyl complexFe(CO)
2(CS){P(OPh)
3}
2, prepared from Fe(CO)
2(CS
2){P(OPh)
3}
2, affords the unstable thioaldehyde complexFe(CO)
2{P(OPh)
3}{(PhO)
2P(OC
6H
4)C(H)S}, which reactswith P(OPh)
3 to give Fe(CO){P(OPh)
3}
2{(PhO)
2P(OC
6H
4)C(H)S}, the crystal structure of which reveals an
2(C,S)-bonded thioaldehyde group formally derived from insertion of the thiocarbonyl C atom into an ortho C-H bondof an axially bound P(OPh)
3 phenyl group.