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Three Redox States of Nitrosyl: NO + , NO . , and NO − /HNO Interconvert Reversibly on the Same Pentacyanoferrate(II) Platform
Author(s) -
Montenegro Andrea C.,
Amorebieta Valentín T.,
Slep Leonardo D.,
Martín Diego F.,
Roncaroli Federico,
Murgida Daniel H.,
Bari Sara E.,
Olabe José A.
Publication year - 2009
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.200806229
Subject(s) - chemistry , redox , deprotonation , aqueous solution , nitroxyl , inorganic chemistry , medicinal chemistry , crystallography , stereochemistry , photochemistry , organic chemistry , ion
Not so elusive : [Fe II (CN) 5 (HNO)] 3− has been characterized spectroscopically after the two‐electron reduction of nitroprusside (see scheme). The complex is stable at pH 6, slowly decomposing to [Fe(CN) 6 ] 4− and N 2 O. It is deprotonated at increasing pH value with oxidation of bound NO − to [Fe II (CN) 5 (NO)] 3− . [Fe II (CN) 5 (HNO)] 3− is the first non‐heme iron–nitroxyl complex prepared in aqueous solution that is reversibly redox‐active under biologically relevant conditions.