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Cationic Diiodo‐Phosphoranides through Oxidative I 2 Addition to Tricyclic Phosphamethine Cyanines
Author(s) -
CicačHudi Mario,
Schlindwein Simon H.,
Feil Christoph M.,
Nieger Martin,
Gudat Dietrich
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800264
Subject(s) - tricyclic , chemistry , cationic polymerization , methylene , halide , iodide , white phosphorus , medicinal chemistry , ethylene , organic chemistry , phosphorus , catalysis
Reaction of methylene‐ and ethylene‐bridged bis‐imidazolium salts with white phosphorus in the presence of KO t Bu furnished moderate yields of tricyclic bis‐imidazolio‐phosphanide halides. Further oxidation of the products with one equivalent of I 2 gave bis‐imidazolio‐diiodophosphoranide iodides. All newly prepared compounds were characterized by analytical and spectroscopic data and single‐crystal XRD studies. DFT calculations provide evidence for substantial stabilization of cyclic bis‐imidazolio‐phosphanide cations by π‐conjugation effects and suggest describing the bis‐imidazolio‐diiodophosphoranide cations as charge‐transfer complexes of dicationic iodophosphines with iodide.