ArticleThe journal of physical chemistry letters2025
New Osmocene and Ruthenocene Phases Reveal the Common Conformational Behavior Regulated by Anagostic Bonds in Prototypical Metallocenes.
Article in The journal of physical chemistry letters, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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3 authors.
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Abstract
Ruthenocene and osmocene, under normal conditions isostructural to low-temperature ferrocene phase III, have been regarded as prototypical metallocenes exclusively present in the energetically favored eclipsed conformation. This strong preference contrasts with ferrocene, which exhibits the staggered, rotated, eclipsed, disordered, and modulated conformations in its five polymorphic forms. Here we show that ruthenocene at 394.0 K and osmocene at 421.5 K transform to new higher-symmetry isostructural phases, where the cyclopentadienyl rings become disordered in two modes: seesaw tilts hinged on the metal cation and rotations about the molecular pseudo-
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