Reactivity of the bis(silyl) palladium(II) complex toward organic isothiocyanates

The bis(silyl) palladium(II) complex [Pd(SiHPh2)2(dmpe)] (dmpe = 1,2-bis(dimethylphosphino)ethane) reacted with organic isothiocyanates R–NCS (R = Ph, iPr, allyl) to give a dithiocarbonimidato [Pd(S2Cdouble bond; length as m-dashN–Ph)(dmpe)] (1), a diphenylsilanedithiolato [Pd(S2SiPh2)(dmpe)] (2), or a π-allyl [(η3-allyl)Pd](NCS) (3) palladium complex, depending on the isothiocyanate type and reaction conditions. In addition, various dithiocarbonimidato Pd(II) complexes were also obtained from trans-[PdEt2L2] (L = PMe3, PMe2Ph) (4–6) or [Pd(styrene)L2] and organic isothiocyanates.