A CHAIN COPOLYMER FROM WCL2(PME2PH)4 AND [TLOCH2CF3]4

A combination Of WCl2(PMePb)4 and [TlOCHCF3]4 crystallize from hexane solution as a 1:1 material whose structure shows it to be an alternati ng chain copolymer. The link between the W- and Tl-containing monomers is composed of weak Tl/Cl interactions between otherwise not signific antly distorted trans-WCl2P4 octahedra and Tl4O4 cubes. The compound c rystallizes as two distinct polymorphs, which differ in the Tl/Cl bond lengths and also the conformation of the phenyl substituents in the W (PMe2Ph)4 substructure. Electronic spectral data support the idea that a Tl/W adduct persists in hexane solution, and it is suggested that t he binding force in both solid and solution is a weak charge transfer complexation.