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Reactive N‐Protonated Isocyanate Species Stabilized by Bis(μ‐hydroxo)divanadium(IV)‐Substituted Polyoxometalate
Author(s) -
Uehara Kazuhiro,
Fukaya Keisuke,
Mizuno Noritaka
Publication year - 2012
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201108205
Subject(s) - polyoxometalate , isocyanate , protonation , chemistry , medicinal chemistry , ammonium , polymer chemistry , stereochemistry , organic chemistry , catalysis , ion , polyurethane
O‐ or N‐protonated? The bis(μ‐hydroxo)divanadium(IV)‐substituted γ‐Keggin‐type polyoxometalate (see picture, left) (TBA) 4 [γ‐SiV IV 2 W 10 O 36 (μ‐OH) 4 ] (TBA=tetra( n ‐butyl)ammonium) was synthesized and characterized by X‐ray crystallography. Its reaction with phenyl isocyanate gave (TBA) 4 [γ‐SiV IV 2 W 10 O 38 (μ‐OH) 2 (PhNHCO) 2 ], which contains two N‐protonated phenyl isocyanate species and catalyzes the cyclotrimerization of phenyl isocyanate.