Maximizing Electron Exchange in a [Fe3] Cluster

Journal of the American Chemical Society
Raúl Hernández SánchezTheodore A Betley

Abstract

The one-electron reduction of ((tbs)L)Fe₃(thf)¹ furnishes [M][((tbs)L)Fe₃] ([M]⁺ = [(18-C-6)K(thf)₂]⁺ (1, 76%) or [(crypt-222)K]⁺ (2, 54%)). Upon reduction, the ligand (tbs)L⁶⁻ rearranges around the triiron core to adopt an almost ideal C₃-symmetry. Accompanying the ((tbs)L) ligand rearrangement, the THF bound to the neutral starting material is expelled, and the Fe-Fe distances within the trinuclear cluster contract by ∼0.13 Å in 1. Variable-temperature magnetic susceptibility data indicates a well-isolated S = 11/2 spin ground state that persists to room temperature. Slow magnetic relaxation is observed at low temperature as evidenced by the out-of-phase (χ(M)″) component of the alternating current (ac) magnetic susceptibility data and by the appearance of hyperfine splitting in the zero-field ⁵⁷Fe Mössbauer spectra at 4.2 K. Analysis of the ac magnetic susceptibility yields an effective spin reversal barrier (U(eff)) of 22.6(2) cm⁻¹, nearly matching the theoretical barrier of 38.7 cm⁻¹ calculated from the axial zero-field splitting parameter (D = -1.29 cm⁻¹) extracted from the reduced magnetization data. A polycrystalline sample of 1 displays three sextets in the Mössbauer spectrum at 4.2 K (H(ext) = 0) which converge to a s...Continue Reading

References

Dec 26, 2001·Chemical Reviews·K D DemadisT J Meyer
Nov 7, 1996·Chemical Reviews·Barbara K. Burgess, David J. Lowe
Jun 20, 2002·Journal of the American Chemical Society·Frédéric BarrièreRichard Sanders
Feb 7, 2004·Science·Kristina N FerreiraSo Iwata
Feb 20, 2004·Journal of the American Chemical Society·Monica SolerGeorge Christou
Aug 19, 2004·Journal of the American Chemical Society·William M ReiffEdward H Witten
Nov 24, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Deanna M D'Alessandro, F Richard Keene
Dec 28, 2007·Hyperfine Interactions·Charles E SchulzW Robert Scheidt
Jun 6, 2009·Annual Review of Biochemistry·Lance C SeefeldtDennis R Dean
Oct 28, 2009·Accounts of Chemical Research·Per E M Siegbahn
Dec 15, 2010·Journal of the American Chemical Society·W Hill HarmanChristopher J Chang
Jan 13, 2011·Angewandte Chemie·Qinliang Zhao, Theodore A Betley
Feb 22, 2011·Journal of the American Chemical Society·Tamara M PowersTheodore A Betley
May 7, 2011·Chemical Communications : Chem Comm·T David HarrisTheodore A Betley
Aug 11, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Yun-Nan GuoJinkui Tang
Sep 20, 2012·Inorganic Chemistry·Emily V Eames, Theodore A Betley
May 7, 2013·Inorganic Chemistry·Emily V EamesTheodore A Betley
Jun 22, 2013·Nature Chemistry·Joseph M ZadroznyJeffrey R Long
Jul 20, 2013·Journal of the American Chemical Society·Tamara M Powers, Theodore A Betley
Oct 30, 2013·Journal of the American Chemical Society·Ie-Rang JeonT David Harris
Sep 10, 2014·Inorganic Chemistry·Majed S FataftahDanna E Freedman
Feb 27, 2015·Chemical Society Reviews·Gavin A Craig, Mark Murrie
Oct 7, 2015·Journal of the American Chemical Society·Raúl Hernández Sánchez, Theodore A Betley

❮ Previous
Next ❯

Citations

Sep 15, 2016·Inorganic Chemistry·Deanna L MillerConnie C Lu
Dec 13, 2016·Journal of the American Chemical Society·Xiao-Nan YaoSong Gao
Feb 25, 2017·Angewandte Chemie·Tim N GieshoffAxel Jacobi von Wangelin
Jul 4, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Fraser S PickMichael D Fryzuk
Aug 12, 2018·Nature Communications·Cornelius KrullAgustin Schiffrin
Apr 3, 2020·Chemical Communications : Chem Comm·Jonathan A KephartElliott B Hulley
Jul 22, 2019·Proceedings of the National Academy of Sciences of the United States of America·Amymarie K BartholomewTheodore A Betley
Oct 29, 2020·Journal of the American Chemical Society·Khetpakorn ChakarawetJeffrey R Long
Aug 9, 2019·Inorganic Chemistry·Zachary A KellyTyrel M McQueen
Jan 23, 2019·Accounts of Chemical Research·Ricardo B Ferreira, Leslie J Murray
Jul 19, 2017·Inorganic Chemistry·John F Berry, Connie C Lu
Nov 8, 2018·Journal of the American Chemical Society·Raúl Hernández Sánchez, Theodore A Betley
Sep 19, 2019·Inorganic Chemistry·R Malcolm Charles IiiTimothy P Brewster
Apr 7, 2020·Journal of the American Chemical Society·Davide TonioloMarinella Mazzanti
May 29, 2019·Inorganic Chemistry·Suman K BarmanRabindranath Mukherjee
Feb 5, 2019·Journal of the American Chemical Society·Camden HuntGabriel Ménard
Nov 26, 2021·Chemical Communications : Chem Comm·Anandi SrinivasanElizabeth A Hillard

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.