Cationic Diiodo-Phosphoranides through Oxidative I-2 Addition to Tricyclic Phosphamethine Cyanines

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Cicac-Hudi , M , Schlindwein , S H , Feil , C M , Nieger , M & Gudat , D 2018 , ' Cationic Diiodo-Phosphoranides through Oxidative I-2 Addition to Tricyclic Phosphamethine Cyanines ' , Zeitschrift für anorganische und allgemeine Chemie , vol. 644 , no. 21 , pp. 1304-1310 . https://doi.org/10.1002/zaac.201800264

Title: Cationic Diiodo-Phosphoranides through Oxidative I-2 Addition to Tricyclic Phosphamethine Cyanines
Author: Cicac-Hudi, Mario; Schlindwein, Simon H.; Feil, Christoph M.; Nieger, Martin; Gudat, Dietrich
Contributor: University of Helsinki, Department of Chemistry
Date: 2018-11-15
Language: eng
Number of pages: 7
Belongs to series: Zeitschrift für anorganische und allgemeine Chemie
ISSN: 0044-2313
URI: http://hdl.handle.net/10138/324822
Abstract: Reaction of methylene- and ethylene-bridged bis-imidazolium salts with white phosphorus in the presence of KOtBu 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 pi-conjugation effects and suggest describing the bis-imidazolio-diiodophosphoranide cations as charge-transfer complexes of dicationic iodophosphines with iodide.
Subject: Phosphamethine cyanines
Phosphorus
Nitrogen heterocycles
Halogenation
Charge transfer
HETEROCYCLIC CARBENE ADDUCTS
PHOSPHORUS(I) CATIONS
BOND
116 Chemical sciences
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