Two 1D [CuxIx]-based coordination polymers of tetraphosphine ligands

Diffusion reactions of CuI with N,N,N′,N′-tetra(diphenylphosphanylmethyl)ethylene diamine) (dppeda) and 1,4-N,N,N′,N′-tetra(diphenylphosphanylmethyl)benzene diamine (dpppda) in MeCN/toluene in a zigzag glass tube or solvothermal reactions of CuI and dppeda or dpppda in MeCN produced two [CuxIx]-based coordination polymers, [Cu2I2(dppeda)]·2MeCN (1·2MeCN) and [Cu4I4(dpppda)]·MeCN (2·MeCN), respectively. Both compounds were characterized by elemental analysis, IR spectroscopy, 1H and 31P{1H} NMR, ESI-MS and thermogravimetric analysis, and their structures were determined by single crystal X-ray diffraction. In 1, [Cu2I2] cores are interconnected by dppeda ligands in a μ-η2:η2 end-to-end mode to form a 1D chain, while in 2 stair-like [Cu4I4] cores are linked by dpppda ligands in a unique Z-shaped μ-η2:η2 side-by-side mode to produce the other kind of 1D chain.