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1. Dynamics and Mechanisms of Mn(II), Co(II), Ni(II), Zn(II), and Cd(II) Sorption onto Green Rust Sulfate

   https://doi.org/10.1021/acs.est.3c01584  

   Alam, Khondaker_M N; Elzinga, Evert J (June 2023, Environmental Science & Technology)
2. Observations on the Mechanochemical Insertion of Zinc(II), Copper(II), Magnesium(II), and Select Other Metal(II) Ions into Porphyrins

   https://doi.org/10.1021/acs.inorgchem.9b00052  

   Atoyebi, Adewole O.; Brückner, Christian (March 2019, Inorganic Chemistry)
3. Tetramethylcyclopentadienyl Samarium(II) Metallocene Chemistry: Isolation of a Bimetallic Sm(II)/Sm(II) Complex

   https://doi.org/10.3390/inorganics11010004  

   Nguyen, Joseph Q.; Ziller, Joseph W.; Evans, William J. (January 2023, Inorganics)

   The salt metathesis reaction between one equivalent of SmI2(THF)2 and two equivalents of K(C5Me4H) in THF afforded single crystals of the unusual, toluene-soluble, and asymmetric bimetallic Sm(II)/Sm(II) complex, (C5Me4H)2SmII(μ-η3:η5-C5Me4H)SmII(C5Me4H)(THF)2, instead of the expected product, (C5Me4H)2SmII(THF)2. The toluene-insoluble products of this reaction can be worked up in 1,2-dimethoxyethane (DME) to provide X-ray quality crystals of the monomeric Sm(II) metallocene, (C5Me4H)2SmII(DME). (C5Me4H)2SmII(DME) can also be synthesized directly by the reaction between one equivalent of SmI2(THF)2 and two equivalents of K(C5Me4H) in neat DME. The isolation and characterization of the bimetallic Sm(II)/Sm(II) complex provides supporting evidence for the possible oligomerization that may occur during the synthesis of Sm(II) complexes with cyclopentadienyl ligands that are less sterically bulky and less solubilizing than (C5Me5)1−. 

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4. Distinct Bimetallic Cooperativity Among Water Reduction Catalysts Containing [Co(III) Co(III) ], [Ni(II) Ni(II) ], and [Zn(II) Zn(II) ] Cores

   https://doi.org/10.1002/chem.202104426  

   Morgan, Fredricka; Schaugaard, Richard; Anderson, Dennis; Schlegel, H Bernhard; Verani, Cláudio N (April 2022, Chemistry – A European Journal)

   Three binuclear species [LCo2III(mu-Pz)(2)](ClO4)(3) (1), [LNi2II(CH3OH)(2)Cl-2]ClO4 (2), and [(LZn2Cl2)-Cl-II]PF6 (3) supported by the deprotonated form of the ligand 2,6-bis[bis(2-pyridylmethyl) amino-methyl]-4-methylphenol were synthesized, structurally characterized as solids and in solution, and had their electrochemical and spectroscopic behavior established. Species 1-3 had their water reduction ability studied aiming to interrogate the possible cooperative catalytic activity between two neighboring metal centers. Species 1 and 2 reduced H2O to H-2 effectively at an applied potential of -1.6 V-Ag/AgCl, yielding turnover numbers of 2,820 and 2,290, respectively, after 30 minutes. Species 3 lacked activity and was used as a negative control to eliminate the possibility of ligand-based catalysis. Pre- and post-catalytic data gave evidence of the molecular nature of the process within the timeframe of the experiments. Species 1 showed structural, rather than electronic cooperativity, while species 2 displayed no obvious cooperativity. DFT methods complemented the experimental results determining plausible mechanisms. 

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5. Mononuclear Four-Coordinate Bis-Fluoride Bis-NHC Complexes of Chromium(II), Iron(II), and Cobalt(II)

   https://doi.org/10.1021/acs.inorgchem.3c02442  

   Acosta, Carlos M; Belov, Dmitry S; Lamur, Andy H; Brantley, ChristiAnna L; Solans-Monfort, Xavier; Rue, Kelly L; Christou, George; Bukhryakov, Konstantin V (November 2023, Inorganic Chemistry)