By reacting
trans-[PdCl(CH2Cl)(PBut
2H)2]
with tetrahydrothiophene (THT) or diethyl
sulfide in the presence of AgCF3SO3 or
TlPF6, the cationic palladium sulfur ylides
trans-[PdCl(CH2SR2)(PBut
2H)2]X
((2)CF3SO3 SR2 =
THT, X = CF3SO3;
(2)PF6 SR2 = THT, X
=
PF6; (3)PF6 SR2 =
SEt2, X = PF6) were isolated and
characterized. The crystal and molecular
structures of (2)CF3SO3
and (3)PF6 were solved by X-ray analyses.
The related complex
cis-[PdCl{CH2S(H)CH3}(PBut
2H)2]CF3SO3
was prepared by an independent route, i.e., by
the oxidative addition of the C−Cl bond of
Cl−CH2SCH3 to
Pd(PBut
2H)3 to form
trans-[PdCl(CH2SCH3)(PBut
2H)2],
which was then protonated with triflic acid.