Stable eight-coordinate iron(III/II) complexes

Inorganic Chemistry
Ashis K PatraTodd C Harrop

Abstract

The chemistry of unusual coordination numbers of transition-metal complexes has been of interest because of their presence in biology and catalytic systems. Herein we describe a systematic and predictable approach toward isolation of stable eight-coordinate (8C) iron(III/II) systems. The 8C (S = 2; high-spin, HS) complex [Fe(L(N4))(2)](BF(4))(2) (1) has been synthesized and characterized, displaying a distorted square-antiprism structure. Complex 1 is a unique 8C iron complex that exhibits remarkable stability in solution under various unfavorable conditions. The E(1/2) value of 1 (0.430 V vs Ag/AgCl, MeCN) supports the Fe(II) oxidation state; however, the corresponding HS (S = 5/2) 8C Fe(III) analogue [Fe(L(N4))(2)](NO(3))(3) (3) has also been synthesized via the chemical oxidation of 1. The structural, spectroscopic, and theoretical descriptions of these 8C iron complexes are reported in this work.

References

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Citations

Aug 13, 2015·Inorganic Chemistry·Gary J LongGeorgia C Papaefthymiou
Apr 10, 2016·Chemistry : a European Journal·Abraham B AlemayehuAbhik Ghosh
Jan 14, 2017·Chemical Communications : Chem Comm·Jing XiangTai-Chu Lau
Nov 18, 2017·RSC Advances·Jia LiFerman A Chavez
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Jun 21, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Xing-Cai HuangXin-Yi Wang
Nov 30, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Holm PetzoldTobias Rüffer
Sep 6, 2020·Acta Crystallographica. Section C, Structural Chemistry·Xiaoyun HaoHongguo Hao
Jul 15, 2018·Scientific Reports·Yuanzheng ChenHui Wang
Dec 13, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Holm PetzoldTobias Rüffer
Apr 17, 2012·Chemistry : a European Journal·Maria Barsukova-StuckartUlrich Kortz
Apr 27, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Holm PetzoldDieter Schaarschmidt
Jun 28, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Koustubh S Dube, Todd C Harrop
Dec 24, 2020·Chemical Communications : Chem Comm·Qian-Qian SuTai-Chu Lau
Dec 15, 2017·Inorganica Chimica Acta·Jia LiFerman A Chavez

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