Abstract
The ligand tetrakis(diphenylphosphinomethyl)methane, tpmm, binds in a η2, η2- bridging mode to square planar platinum(II) or palladium(II) centers to give complexes such as [Pt2Me4(μ-tpmm)] or [Pd2Cl4(μ-tpmm)]. These complexes yielded triflate derivatives [Pt2Me2(OTf)2(μ-tpmm)] or [Pd2(OTf)4(μ-tpmm)], and displacement of triflate by a bipyridine ligand then gave the cationic polymers [{Pt2Me2(μ-LL)(μ-tpmm)}n]2n+ or the cationic network materials [{Pd2(μ-LL)2(μ-tpmm)}n]4n+, LL=4,4’-bipyridine or 1,3-C6H4(CONH-4-C5H4N)2. Ligand tpmm reacts with copper(I) iodide to give [Cu4I4(μ-tpmm)2] or with silver(I) triflate to give [Ag2(OTf)2(μ-tpmm)], which then reacts with LL=1,3-C6H4(CONH-4-C5H4N)2 to give the polymeric complex [{Ag2(μ-LL)(μ-tpmm)}n]2n+. The structure determination of [Cu4I4(μ-tpmm)2] shows that it contains two isomeric forms with the tpmm ligands in either the η2, η2- or η3, η1- bridging mode.
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