Dimer oder nicht dimer, das ist hier die Frage: Zwei benachbarte I3 –--Ionen eingeschlossen in Hohlr¨aumen einer komplexen Wirtsstruktur

Abstract

[Me(HO)2P-(CH2)10-P(O)OHMe]2[I3]2・MeHO(O)P-(CH2)10-P(O)OHMe (1) was synthesized and characterized by IR, Raman and NMR spectroscopy. Its structure was determined by singlecrystal X-ray diffraction (T = 100 K; space group P1̄). The structure consists of decane-1,10-diyl-bis- (methylphosphinic acid) molecules and the analogous mono-protonated cations in a ratio 1:2 connected with each other by strong O-H···O hydrogen bonds to form a two-dimensional network. Between these hydrogen-bonded layers, there are elongated cavities each containing two triiodide anions. The intermolecular I· · · I distance of the two enclosed triiodide anions is 3.6317(4) Å and should be considered as an interhalogen bonding interaction.