Synthesis and Reactivity of Palladium- and Platinum-Bridged Heterobimetallic [3]Trochrocenophanes

Heterobimetallic [3]­trochrocenophanes with PdCl2 and PtCl2 bridges were prepared in reasonable yields. The PdCl2 species possess, like their Pt analogues, poor solubility but can be made more soluble by ligand substitution. By reaction of Pd-bridged [3]­trochrocenophanes with MeLi, both Cl atoms can be substituted by a Me group. Likewise, reaction of Pt-bridged complexes with LiCCPh leads to the expected disubstituted compound. Herein we present the synthesis of MCl2- and MR2-bridged (M = Pd, Pt; R = Me, CCPh) [3]­trochrocenophanes, as well as some solid-state structures of these [3]­trochrocenophanes.