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1. Electrodeposition of Ru onto Ru and Au Seed Layers from Solutions of Ruthenium Nitrosyl Sulfate and Ruthenium Chloride

   https://doi.org/10.1149/1945-7111/abff68  

   Gusley, Ryan; Cumston, Quintin; Coffey, Kevin R.; West, Alan C.; Barmak, Katayun (May 2021, Journal of The Electrochemical Society)

   The electrodeposition of Ru was investigated from solutions of ruthenium(III) nitrosyl sulfate and ruthenium(III) chloride onto seed layers of epitaxial and polycrystalline Ru and epitaxial Au. Using both galvanostatic and potentiostatic deposition modes, metallic Ru was found to electrodeposit as a porous layer comprised of (0001) oriented Ru crystallites, the presence of which was discovered and confirmed by X-ray and scanning transmission and transmission electron microscope (S/TEM) analyses. This finding was independent of the Ru salt and seed layer used. Using X-ray reflectivity (XRR), the average film density ${\rho }_{eff}$of the porous electrodeposited Ru layer was measured as less than the density of bulk Ru ${\rho }_{Ru,bulk}$(14.414 g cm⁻³). Increasing the magnitude of the applied current density from −100μA cm⁻²to −10 mA cm⁻²in solutions of Ru nitrosyl sulfate increased the ${\rho }_{eff}$from 7.4 g cm⁻³to 9.7 g cm⁻²while the current efficiency decreased from 9.4% to 4.3%. 

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2. Divalent Titanium via Reductive N‐C Coupling of a TiIV Nitrido with π‐Acids.

   https://doi.org/10.1002/ange.202404601  

   Bhunia, Mrinal; Sandoval-Pauker, Christian; Fehn, Dominik; Grant, Lauren; Senthil, Shuruthi; Gau, Michael; Ozarowski, Andrew; Krzystek, Jurek; Telser, Joshua; Pinter, Balazs; et al (April 2024, Angewandte Chemie)

   The nitrido‐ate complex [(PN)2Ti(N){μ2‐K(OEt2)}]2 (1) reductively couples CO and isocyanides in the presence of DME or cryptand, to form rare, five‐coordinate TiII complexes having a linear cumulene motif, [K(L)][(PN)2Ti(NCE)] (E = O, L = Kryptofix222, (2); E = NAd, L = 3 DME, (3); E = NtBu, L = 3 DME, (4); E = NAd, L = Kryptofix222, (5)). Oxidation of 2‐5 with [Fc][OTf] afforded an isostructural TiIII center containing a neutral cumulene [(PN)2Ti(NCE)] (E = O, (6); E = NAd (7), NtBu (8)). Moreover, 1e‐ reduction of 6 and 7 in the presence of cryptand cleanly reformed corresponding discrete TiII complexes 2 and 5, which were further characterized by solution magnetization measurements and high‐ frequency and ‐field EPR (HFEPR) spectroscopy. Furthermore, oxidation of 7 with [Fc*][B(C6F5)4] resulted in a ligand disproportionated TiIV complex having transoid carbodiimides, [(PN)2Ti(NCNAd)2] (9). Comparison of spectroscopic, structural, and computational data for the divalent, trivalent, and tetravalent systems, including their 15N enriched isotopomers demonstrate these cumulenes to decrease in order of backbonding as TiII→TiIII→TiIV and increasing order of p‐donation as TiII→TiIII→TiIV, thus displaying more covalency in TiIII species. Lastly, we show a synthetic cycle whereby complex 1 can deliver an N‐atom to π‐acids. 

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3. C–H Bond Addition across a Transient Uranium–Nitrido Moiety and Formation of a Parent Uranium Imido Complex

   https://doi.org/10.1021/jacs.8b06090  

   Mullane, Kimberly C.; Ryu, Ho; Cheisson, Thibault; Grant, Lauren N.; Park, Ji Young; Manor, Brian C.; Carroll, Patrick J.; Baik, Mu-Hyun; Mindiola, Daniel J.; Schelter, Eric J. (August 2018, Journal of the American Chemical Society)
4. Group actions on cluster algebras and cluster categories

   https://doi.org/10.1016/j.aim.2019.01.009  

   Paquette, Charles; Schiffler, Ralf (March 2019, Advances in Mathematics)
5. Solubility of Iridium and Ruthenium Organometallic Photoredox Catalysts

   https://doi.org/10.1021/acs.oprd.9b00041  

   Jespersen, Daniel; Keen, Brockton; Day, Jon I.; Singh, Anuradha; Briles, Justin; Mullins, Duncan; Weaver, Jimmie D. (May 2019, Organic Process Research & Development)

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