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1. Ligand Reorganization in the Coordination Sphere of a CCC-NHC Pincer Fe Complex and Transient Absorption Spectroscopic Characterization of [( Bu C i C i C Bu ) 2 Fe]I

   https://doi.org/10.1021/acs.organomet.3c00386  

   Mensah, Joshua ; Adiraju, Venkata K. ; Cope, James D. ; Lamb, Robert W. ; Li, Xiao X. ; Donnadieu, Bruno ; Rubtsov, Igor V. ; Webster, Charles Edwin ; Hollis, T. Keith ( February 2024 , Organometallics)

   Monoligated and bis-ligated CCC-NHC pincer Fe complexes with n-butyl substituents have been synthesized by the Zr metalation/transmetalation route. Both the direct metalation/transmetalation and transmetalation from the isolated (BuCiCiCBu)ZrNMe2Cl2, 3, yielded the octahedrally coordinated Fe(III) bis-ligated complex [(BuCiCiCBu)2Fe]Cl, 2a. Transmetalation from in situ and isolated (BuCiCiCBu)ZrCl3, 5, in the presence of excess TMSCl and 1 equiv of the Fe source yielded the monoligated (BuCiCiCBu)FeCl2, 4. Conditions that convert [(BuCiCiCBu)2Fe]+, 2, to (BuCiCiCBu)FeCl2, 4, complex have been found. Characterization included 1H NMR, UV−visible, femtosecond transient absorption spectroscopies, TDDFT computations, and mass spectroscopy along with X-ray crystallographic structure determinations. 

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2. Structure, Magnetism, and Multi-electron Reduction Reactivity of the Inverse Sandwich Reduced Arene La 2+ Complex [{[C 5 H 3 (SiMe 3 ) 2 ] 2 La} 2 (μ-η 6 :η 6 -C 6 H 6 )] 1–

   https://doi.org/10.1021/acs.organomet.8b00523  

   Palumbo, Chad T. ; Darago, Lucy E. ; Dumas, Megan T. ; Ziller, Joseph W. ; Long, Jeffrey R. ; Evans, William J. ( September 2018 , Organometallics)
3. Direct Reduction of NO to N 2 O by a Mononuclear Nonheme Thiolate Ligated Iron(II) Complex via Formation of a Metastable {FeNO} 7 Complex

   https://doi.org/10.1021/acs.inorgchem.2c02383  

   Dey, Aniruddha ; Albert, Therese ; Kong, Richard Y. ; MacMillan, Samantha N. ; Moënne-Loccoz, Pierre ; Lancaster, Kyle M. ; Goldberg, David P. ( September 2022 , Inorganic Chemistry)
4. Synthesis and Reactivity of Functionalized Dimethylgermyl Complexes of the Formula (η 5 -C 5 H 5 )Re(NO)(PPh 3 )(GeMe 2 X); Equilibria Involving the Dimethylgermylene Complex [(η 5 -C 5 H 5 )Re(NO)(PPh 3 )(=GeMe 2 )]• TfO −

   https://doi.org/10.1080/10426509408037445  

   Lee, Kenneth E. ; Gladysz, J. A. ( February 1994 , Phosphorus, Sulfur, and Silicon and the Related Elements)
5. Spectroscopic and electrochemical characterization of a Pr 4+ imidophosphorane complex and the redox chemistry of Nd 3+ and Dy 3+ complexes

   https://doi.org/10.1039/D2DT00758D  

   Rice, Natalie T. ; Popov, Ivan A. ; Carlson, Rebecca K. ; Greer, Samuel M. ; Boggiano, Andrew C. ; Stein, Benjamin W. ; Bacsa, John ; Batista, Enrique R. ; Yang, Ping ; La Pierre, Henry S. ( May 2022 , Dalton Transactions)

   The molecular tetravalent oxidation state for praseodymium is observed in solution via oxidation of the anionic trivalent precursor [K][Pr 3+ (NP(1,2-bis- t Bu-diamidoethane)(NEt 2 )) 4 ] (1-Pr(NP*)) with AgI at −35 °C. The Pr 4+ complex is characterized in solution via cyclic voltammetry, UV-vis-NIR electronic absorption spectroscopy, and EPR spectroscopy. Electrochemical analyses of [K][Ln 3+ (NP(1,2-bis- t Bu-diamidoethane)(NEt 2 )) 4 ] (Ln = Nd and Dy) by cyclic voltammetry are reported and, in conjunction with theoretical modeling of electronic structure and oxidation potential, are indicative of principal ligand oxidations in contrast to the metal-centered oxidation observed for 1-Pr(NP*). The identification of a tetravalent praseodymium complex in in situ UV-vis and EPR experiments is further validated by theoretical modeling of the redox chemistry and the UV-vis spectrum. The latter study was performed by extended multistate pair-density functional theory (XMS-PDFT) and implicates a multiconfigurational ground state for the tetravalent praseodymium complex. 

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