Organophosphines in organoplatinum complexes: structural aspects of trans-PtP2C2 derivatives

Abstract

<jats:title>Abstract</jats:title><jats:p>This review summarized and analyzed the structural parameters of 174 monomeric organoplatinum complexes with an inner coordination sphere of trans-PtP<jats:sub>2</jats:sub>C<jats:sub>2</jats:sub>. These complexes crystallized in four crystal systems: hexagonal (x2), orthorhombic (x13), triclinic (x76), and monoclinic (x84). These complexes, on the basis of the coordination mode of the respective donor ligands, can be divided into the seven sub-groups: Pt(PL)<jats:sub>2</jats:sub>(CL)<jats:sub>2</jats:sub>, Pt(PL)<jats:sub>2</jats:sub>(η<jats:sup>2</jats:sup>-C<jats:sub>2</jats:sub>L), Pt(η<jats:sup>2</jats:sup>-P<jats:sub>2</jats:sub>L)(CL)<jats:sub>2</jats:sub>, Pt(PL)(η<jats:sup>2</jats:sup>-P,CL)(CL), Pt(η<jats:sup>2</jats:sup>-P,CL)<jats:sub>2</jats:sub>, Pt(η<jats:sup>3</jats:sup>-P,C,PL)(CL), and Pt(η<jats:sup>3</jats:sup>-C,P,CL)(PL). The chelating ligands create 4-, 5-, 6-, 16-, 17-, 18-, and 19-membered rings. The total mean values of Pt-L bond distances are 2.055 Å (C) and 2.300 Å (P). There are examples that exist in two isomeric forms and are examples of distortion isomerism. The structural parameters of trans-PtP<jats:sub>2</jats:sub>C<jats:sub>2</jats:sub> are discussed with those of cis-PtP<jats:sub>2</jats:sub>C<jats:sub>2</jats:sub> derivatives.</jats:p>