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Creators/Authors contains: "Chen, Chun‐Hsing"

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  1. ; ; ; ; (, Chemical Science)
    Using a diverse array of thermally robust phosphine enediynes, a novel suite of cisplatin-like Pt(ii) metalloenediynes (3, Pt(dxpeb)Cl2) has been synthesized representing unique electronic perturbations on thermal Bergman cyclization kinetics. 
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    Free, publicly-accessible full text available December 18, 2025
  2. ; ; ; ; ; (, American Chemical Society)
    Bipyridine ligands have been extensively employed in nickel catalysis, with ligand modifications focused on steric or electronic tuning. In this work, we explore modifications designed to modulate the coordination mode using a 2,2'-bipyridine derivative with an appended aza-crown ether macrocycle capable of flexidentate binding to nickel. A series of complexes varying in charge from neutral to dicationic demonstrates the flexibility of the macrocycle, with bipyridine-aza-crown ether denticity changing from к4 to к6 upon sequential abstraction of chloride ligands. The changes in binding mode can be reversed by addition of chloride ion. Comparisons between the macrocycle-containing ligand and an analogous ligand with a non-macrocyclic diethylamine donor provide insight into the role of the crown ether, including in electrochemical reductions probed via cyclic voltammetry. 
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  3. ; ; ; ; ; (, Journal of the American Chemical Society)
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  4. ; ; ; ; ; ; (, Journal of the American Chemical Society)
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  5. ; ; ; ; (, Dalton Transactions)
    Proton-switchable access to seven-coordinate ONNO dicarboxamide and NNNN dicarboxamidate rhenium oxo complexes provides a platform for understanding thermodynamics and bonding in pentagonal bipyramidal complexes. 
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  6. ; ; ; ; ; ; ; ; ; ; et al (, Acta Crystallographica Section C Structural Chemistry)
    We report on the latest advancements in Microcrystal Electron Diffraction (3D ED/MicroED), as discussed during a symposium at the National Center for CryoEM Access and Training housed at the New York Structural Biology Center. This snapshot describes cutting-edge developments in various facets of the field and identifies potential avenues for continued progress. Key sections discuss instrumentation access, research applications for small mol­ecules and biomacromolecules, data collection hardware and software, data reduction software, and finally reporting and validation. 3D ED/MicroED is still early in its wide adoption by the structural science community with ample opportunities for expansion, growth, and innovation. 
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  7. ; ; ; ; (, Inorganic Chemistry)
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  8. ; ; ; (, Inorganic Chemistry)
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  9. ; ; ; ; ; ; ; (, Dalton Transactions)
    When irradiated with blue light in the presence of a Lewis base (L), [CpW(CO) 3 ] 2 undergoes metal–metal bond cleavage followed by a disproportionation reaction to form [CpW(CO) 3 L] + and [CpW(CO) 3 ] − . Here, we show that in the presence of pyridinium tetrafluoroborate, [CpW(CO) 3 ] − reacts further to form a metal hydride complex CpW(CO) 3 H. The rection was monitored through in situ photo 1 H NMR spectroscopy experiments and the mechanism of light-driven hydride formation was investigated by determining quantum yields of formation. Quantum yields of formation of CpW(CO) 3 H correlate with I −1/2 (I = photon flux on our sample tube), indicating that the net disproportionation of [CpW(CO) 3 ] 2 to form the hydride precursor [CpW(CO) 3 ] − occurs primarily through a radical chain mechanism. 
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  10. ; ; ; ; ; (, Organometallics)
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