Linear Heterotrinuclear Complexes Derived from an Alkyl Platinum(II) Twelve-Membered Macrocycle^‖

The P,N,P-tridentate ligand 2,6-bis(diphenylphosphino)pyridine, L, was employed to generate a twelve-membered metallomacrocyclic host species cis-Pt2Me4(μ-L)2 that encapsulates Tl(I) and Cu(I) guest ions. The ligand was also used to synthesize another two linear heterotrinuclear complexes, [Me2Pt(μ-L)2Ag2(MeCN)2](BF4)2·MeCN and [(CO)3Fe(μ-L)2Ag2(Et2O)](ClO4)2, both containing a metal−metal dative bond (Pt→Ag and Fe→Ag, respectively) and stabilized by the d10−d10 argentophilic interaction.