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1. Di(indenyl)beryllium

   https://doi.org/10.1002/anie.202107980  

   Koby, Ross_F; Schley, Nathan_D; Hanusa, Timothy_P (August 2021, Angewandte Chemie International Edition)

   Abstract The bonding in beryllocene, [BeCp₂], took decades to establish, owing to its unexpected mixed hapticity structure (i.e., [Be(η⁵‐Cp)(η¹‐Cp)]). Beryllium complexes containing the indenyl ligand, which is a close relative of the cyclopentadienyl anion, but which is also known to exhibit its own bonding peculiarities (e.g., facile η⁵⇄ η³shifts), have remained unknown. Standard metathetical approaches to their synthesis (e.g., with K[Ind′] + BeX₂in an ether solvent) give rise to intractable oils from which nothing identifiable can be isolated. In contrast, mechanochemical preparation, involving the solvent‐free grinding of BeBr₂and potassium indenides, leads to the production of discrete (indenyl)beryllium complexes, including [Be(C₉H₇)₂] (1) and [Be{1,3‐(SiMe₃)₂C₉H₅}Br] (2). The former displays η⁵/η¹‐coordinated ligands in the solid state, but DFT calculations indicate that an η⁵/η⁵‐conformation is less than 5 kcal mol⁻¹higher in energy. 

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2. Toward Antikekulene: Angular 1,2-Di-, 2,3-Di-, and 1,2,15,16-Tetrachloro[6]phenylene

   https://doi.org/10.1055/s-0034-1379140  

   Fonari, Alexandr; Röder, Jens; Shen, Hao; Timofeeva, Tatiana; Vollhardt, K. (October 2014, Synlett)
3. Design of a minimal di-nickel hydrogenase peptide

   https://doi.org/10.1126/sciadv.abq1990  

   Timm, Jennifer; Pike, Douglas H.; Mancini, Joshua A.; Tyryshkin, Alexei M.; Poudel, Saroj; Siess, Jan A.; Molinaro, Paul M.; McCann, James J.; Waldie, Kate M.; Koder, Ronald L.; et al (March 2023, Science Advances)

   Thorp, Holden (Ed.)

   Ancestral metabolic processes involve the reversible oxidation of molecular hydrogen by hydrogenase. Extant hydrogenase enzymes are complex, comprising hundreds of amino acids and multiple cofactors. We designed a 13–amino acid nickel-binding peptide capable of robustly producing molecular hydrogen from protons under a wide variety of conditions. The peptide forms a di-nickel cluster structurally analogous to a Ni-Fe cluster in [NiFe] hydrogenase and the Ni-Ni cluster in acetyl-CoA synthase, two ancient, extant proteins central to metabolism. These experimental results demonstrate that modern enzymes, despite their enormous complexity, likely evolved from simple peptide precursors on early Earth. 

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4. Empathetic Robot with Transformer-Based Di-alogue Agent

   Xie, Baijun; Park, Chung (July 2021, International Conference on Ubiquitous Robots (UR))

   Natural Human-Robot interaction (HRI) attracts considerable interest in letting robots understand the users’ emotional state. This paper demonstrates a method to introduce the affection model to the robotic system’s conversational agent to provide natural and empathetic HRI. We use a large-scale pre-trained language model and fine-tune it on a dialogue dataset with empathetic characteristics. Based on existing studies’ progress, we extend the current method and enable the agent to perform advanced sentiment analysis using the affection model. This dialogue agent will allow the robot to provide natural response along with emotion classification and the estimations of arousal and valence level. We evaluate our model using different metrics, comparing it with the recent studies and showing its emotion detection capacity. 

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5. Enantioselective syntheses of organosulfur compounds via [2,3] sigmatropic rearrangements of ylides derived from di(allyl), di(propargyl), and di(benzyl) sulfide complexes; Control of carbon configuration by an easily resolved and recycled rhenium auxiliary

   https://doi.org/10.1351/pac199668010079  

   Meyer, O.; Cagle, P. C.; Weickhardt, K.; Vichard, D.; Gladysz, John A. (January 1996, Pure and Applied Chemistry)