Synthesis of halogen-bridged complexes [Pt(R2SO)(μ-X)X]2 by thermolysis of cis-[Pt(R2SO)(R′CN)X2]. X-ray structure of di-μ-chloro-dichlorobis(diethyl sulfoxide) diplatinum(II)

Synthesis and Structure of New Neutral Bimetallic Platinum Hydride Complexes

“…The bridging chloride ligand is nearly symmetrically bound to both platinum centers, and the Pt−Cl distances (Pt(2)−Cl(1) = 2.342(2) Å, Pt(1)−Cl(1) = 2.349(2) Å) are comparable to those found in other doubly chloride-bridged diplatinum complexes . The Pt−P distances (Pt(2)−P(2) = 2.197(2) Å, Pt(1)−P(1) = 2.204(2) Å) are significantly shorter than those found in 1b and 2c , in keeping with the very low trans influence of the chloride bridging ligand …”

A convenient route to dinuclear chloro-bridged platinum(ii) derivatives vianitrile complexes

“…Starting from the easily available [PtCl 2 (NCEt) 2 ], the syntheses of [PtCl 2 (NCEt)(L)] (L = PPh 3 (1a), Py (5)), [PtCl 2 (NCMe)(PPh 3 )] (1b) and [SP-4-2]-[PtCl{(k 2 -P,C)P(OC 6 H 4 )(OPh) 2 }(NCEt)] ([SP-4-2]-3) have been carried out in moderate to good yields and the preparation of [PtCl 2 (NCEt)(CO)] 5 (6) has been optimized. While for L = Py the stoichiometric substitution reaction (L/Pt molar ratio = 1, eqn (10)) can be carried out at room temperature in propionitrile and affords the trans-isomer of the expected 5, in the case of PPh 3 and P(OPh) 3 the analogous reactions carried out at room temperature afford mixtures containing the starting platinum complex and the double substitution product, [PtCl 2 L 2 ], probably because the strong trans-effect of these ligands makes the second substitution reaction (eqn (11)) faster than the former (eqn (10)).…”

“…[PtCl 2 (NCR) 2 ] + L → [PtCl 2 L(NCR)] + RCN (10) [PtCl 2 L(NCR)] + L → [PtCl 2 L 2 ] + RCN (11) Suitable conditions for the conversion of the obtained mixtures into the desired products have been found. In the case of L = P(OPh) 3 the procedure afforded the ortho-metalated product 3.…”

trans-Di-μ-chloro-bis[(dimethyl sulfoxide-κS)phenylplatinum(II)]

“…Selected bond lengths and angles are given in Table 1. Previous structure analyses of related dimers show corresponding PtÐCl bond distances in the range 2.360± 2.440 A Ê (Kukushkin et al, 1991;Watkins, 1970;Boag & Ravetz, 1996;Kazankov et al, 1997).…”