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1. Partially Shielded Fe(CO) 3 Rotors: Syntheses, Structures, and Dynamic Properties of Complexes with Doubly trans Spanning Diphosphines, trans -Fe(CO) 3 (PhP((CH 2 ) n ) 2 PPh)

   https://doi.org/10.1021/acs.organomet.7b00330  

   Steigleder, Esther ; Shima, Takanori ; Lang, Georgette M. ; Ehnbom, Andreas ; Hampel, Frank ; Gladysz, John A. ( July 2017 , Organometallics)
2. Structural Motifs of [Fe(CO 2 ) n ] − Clusters ( n = 3–7)

   https://doi.org/10.1021/acs.jpca.7b02742  

   Thompson, Michael C. ; Dodson, Leah G. ; Weber, J. Mathias ( May 2017 , The Journal of Physical Chemistry A)
3. A 10 6 -Fold Enhancement in N 2 -Binding Affinity of an Fe 2 (μ-H) 2 Core upon Reduction to a Mixed-Valence Fe II Fe I State

   https://doi.org/10.1021/ja507217v  

   Rittle, Jonathan ; McCrory, Charles C. ; Peters, Jonas C. ( October 2014 , Journal of the American Chemical Society)
4. Toward Frameworks with Multiple Aligned and Interactive Fe(CO) 3 Rotators: Syntheses and Structures of Diiron Complexes Linked by Two trans -Diaxial α,ω-Diphosphine Ligands Ar 2 P(CH 2 ) n PAr 2

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   Zarcone, Samuel R. ; Chu, Gong M. ; Ehnbom, Andreas ; Cardenal, Ashley ; Fiedler, Tobias ; Bhuvanesh, Nattamai ; Hall, Michael B. ; Gladysz, John A. ( March 2021 , Inorganic Chemistry)

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5. Spin Transitions and Compressibility of ε‐Fe 7 N 3 and γ′‐Fe 4 N: Implications for Iron Alloys in Terrestrial Planet Cores

   https://doi.org/10.1029/2020JB020660  

   Lv, Mingda ; Liu, Jiachao ; Zhu, Feng ; Li, Jie ; Zhang, Dongzhou ; Xiao, Yuming ; Dorfman, Susannah M. ( November 2020 , Journal of Geophysical Research: Solid Earth)

   Iron nitrides are possible constituents of the cores of Earth and other terrestrial planets. Pressure‐induced magnetic changes in iron nitrides and effects on compressibility remain poorly understood. Here we report synchrotron X‐ray emission spectroscopy (XES) and X‐ray diffraction (XRD) results for ε‐Fe₇N₃and γ′‐Fe₄N up to 60 GPa at 300 K. The XES spectra reveal completion of high‐ to low‐spin transition in ε‐Fe₇N₃and γ′‐Fe₄N at 43 and 34 GPa, respectively. The completion of the spin transition induces stiffening in bulk modulus of ε‐Fe₇N₃by 22% at ~40 GPa, but has no resolvable effect on the compression behavior of γ′‐Fe₄N. Fitting pressure‐volume data to the Birch‐Murnaghan equation of state yieldsV₀ = 83.29 ± 0.03 (ų),K₀ = 232 ± 9 GPa,K₀′ = 4.1 ± 0.5 for nonmagnetic ε‐Fe₇N₃above the spin transition completion pressure, andV₀ = 54.82 ± 0.02 (ų),K₀ = 152 ± 2 GPa,K₀′ = 4.0 ± 0.1 for γ′‐Fe₄N over the studied pressure range. By reexamining evidence for spin transition and effects on compressibility of other candidate components of terrestrial planet cores, Fe₃S, Fe₃P, Fe₇C₃, and Fe₃C based on previous XES and XRD measurements, we located the completion of high‐ to low‐spin transition at ~67, 38, 50, and 30 GPa at 300 K, respectively. The completion of spin transitions of Fe₃S, Fe₃P, and Fe₃C induces elastic stiffening, whereas that of Fe₇C₃induces elastic softening. Changes in compressibility at completion of spin transitions in iron‐light element alloys may influence the properties of Earth's and planetary cores.

    

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