Dimeric, or not dimeric, that is the question: Two neighboring I _3~- ions enclosed in cavities of a complex host structure [Dimer oder nicht dimer, das ist hier die frage: Zwei benachbarte I _3~--ionen eingeschlossen in hohlr?umen einer komplexen wirtsstruktur]

摘要

[Me(HO)_2P-(CH_2)_(10)-P(O)OHMe] _2[I_3]_2·MeHO(O)P-(CH_2) _(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 P1?). 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) ? and should be considered as an interhalogen bonding interaction.