Reaction of η4-ketene complexes of iron with a phosphorus-sulfur ylide (Davy reagent): Insertion of sulfur into a carbon-iron bond with formation of ferrathiolactones

Abstract

Complexes Fe(CO) 3( ν 4-PhCHCHC(Ph)CO) ( 1) and Fe(CO) 3( η 4-PhCHCH(CHCHPh) CCO ( 2) with Davy's reagent (2,4-bis(methylthio)-1,3-dithia-2,4-diphosphetane-2,4-disulfide) to give complexes (Fe(CO) 3(SC(O)C(Ph)CHCHPh) ( 3) and [Fe(CO) 3(SC(O)C(CHz.dbnd;CHPh)CHCH(Ph))] ( 4) upon insertion of sulfur into an FeC bond. Complex ( 4) could be fully characterized by X-ray crystallography: C 21H 14FeO 4S; triclinic; space group, P 1; a = 6.825(2), b = 10.770(2) and c = 13.375(2) A ̊ ; α = 103.55(2), β = 91.60(2) and γ = 91.10(2)°; U = 955.0(2) A ̊ 3; D c = 1.454 g cm −3; Z = 2 .