Organophosphines in organoplatinum complexes – Structural aspects of trans-PtP2CCl derivatives

• Structure of trans-PtP2CCl.
• Review of over 130 complexes.
• Comparison with cis-PtP2Cl (over 60).
• Attention to any trans-influence.
• Isomers.

In this review are classified and analyzed structural parameters of over one hundred and thirty monomeric organoplatinum complexes with trans- PtP2CCl inner coordination sphere. These complexes crystallized in four crystal systems: tetragonal (×2), orthorhombic (×22), triclinic (×41) and monoclinic (×69). These complexes from the coordination mode of the respective donor ligands, which build up inner coordination sphere, trans- PtP2CCl, can be divided into the five groups. There is variety of donor ligands, monodentate PL,CL and Cl; homobidentate- P,P’; heterobidentate- P/C and P/Cl, and even heterotridentate- P,C,P donor ligands. The chelating ligands created variety of metallocyclic rings. There are several examples which exist in two isomeric forms and some other examples which contain two crystallographically independent molecules within the same crystal. These isomeric forms as well as independent molecules are example of distortion isomerism. The comprehensive mean Pt-L bond distances elongated in the order: 2.01 Å (C, trans to Cl) < 2.287 Å (P, trans to P) < 2.390 Å (Cl, trans to C).

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