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Dinitrogen Activation Upon Reduction of a Triiron(II) Complex
Author(s) -
Lee Yousoon,
Sloane Forrest T.,
Blondin Geneviève,
Abboud Khalil A.,
GarcíaSerres Ricardo,
Murray Leslie J.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201409676
Subject(s) - chemistry , protonation , yield (engineering) , nuclear magnetic resonance spectroscopy , crystallography , nmr spectra database , ammonia , infrared spectroscopy , protonolysis , medicinal chemistry , stereochemistry , catalysis , spectral line , organic chemistry , ion , materials science , physics , astronomy , metallurgy
Reaction of a trinuclear iron(II) complex, Fe 3 Br 3 L ( 1 ), with KC 8 under N 2 leads to dinitrogen activation products ( 2 ) from which Fe 3 (NH) 3 L ( 2‐1 ; L is a cyclophane bridged by three β‐diketiminate arms) was characterized by X‐ray crystallography. 1 H NMR spectra of the protonolysis product of 2 synthesized under 14 N 2 and 15 N 2 confirm atmospheric N 2 reduction, and ammonia is detected by the indophenol assay (yield ∼30 %). IR and Mössbauer spectroscopy, and elemental analysis on 2 and 2‐1 as well as the tri(amido)triiron(II) 3 and tri(methoxo)triiron 4 congeners support our assignment of the reduction product as containing protonated N‐atom bridges.