Bis(triphenylphosphine)platinum chloride
2Cl2.png) | |
| Names | |
|---|---|
| Other names
cis-dichlorbis(triphenylphosphine)platinum(II) | |
| Identifiers | |
| 15604-36-1 | |
| Properties | |
| C36H30Cl2P2Pt | |
| Molar mass | 790.57 g·mol−1 |
| Appearance | white solid |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
2Cl2.png){kind=spacer} | |
| Names | |
|---|---|
| Other names
trans-dichlorbis(triphenylphosphine)platinum(II) | |
| Identifiers | |
| 14056-88-3 | |
| Properties | |
| C36H30Cl2P2Pt | |
| Molar mass | 790.57 g·mol−1 |
| Appearance | yellow solid |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Bis(triphenylphosphine)platinum chloride is a metal phosphine complex with the formula PtCl2[P(C6H5)3]2. Cis- and trans isomers are known. The cis isomer is a white crystalline powder, while the trans isomer is yellow.[1] Both isomers are square planar about the central platinum atom. The cis isomer is used primarily as a reagent for the synthesis of other platinum molecules.
Preparation
The cis isomer is the prepared by heating solutions of platinum(II) chlorides with triphenylphosphine. For example, starting from potassium tetrachloroplatinate:
- K2PtCl4 + 2 PPh3 → cis-Pt(PPh3)2Cl2 + 2 KCl
The trans isomer is the prepared by treating potassium trichloro(ethylene)platinate(II) (Zeise's salt) with triphenylphosphine:[1]
- KPt(C2H4)Cl3 + 2 PPh3 → trans-Pt(PPh3)2Cl2 + KCl + C2H4
Heat or excess phosphine ligand causes the trans isomer to isomerize to the white cis complex. The latter complex is the thermodynamic product due to triphenylphosphine being a strong trans effect ligand.
In cis-bis(triphenylphosphine)platinum chloride, the average Pt-P has a bond distance of 2.261 Å and the average Pt-Cl has a bond distance of 2.346 Å.[2][3][2]
See also
References
- 1 2 Hsu, C. Y.; Leshner, B. T.; Orchin, M.; Laurent, M. (2007). "Trans Phosphine Complexes of Platinum(II) Chloride". Inorg. Synth. 19: 114–116. doi:10.1002/9780470132500.ch25.
- 1 2 H.-K. Fun; S. Chantrapromma; Y.-C. Liu; Z.-F. Chen; H. Liang (2006). "cis-Dichlorobis(triphenylphosphine-κP)platinum(II)". Acta Crystallogr. E. 62: m1252–m1254. doi:10.1107/S1600536806016540.
- ↑ M. H. Johansson; S. Otto (2000). "trans-Dichlorobis(triphenylphosphine-P)platinum(II)". Acta Crystallogr. C. 56: e12–e15. doi:10.1107/S010827019901608X.