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Updated: Jul 4, 2025

Performing In Situ Closed-Cell Gas Reactions in the Transmission Electron Microscope
Published on: July 24, 2021
In situ studies of reversible solid-gas reactions of ethylene responsive silver pyrazolates
H V Rasika Dias1, Devaborniny Parasar1, Andrey A Yakovenko2
1Department of Chemistry and Biochemistry, The University of Texas at Arlington Arlington Texas 76019 USA dias@uta.edu.
Abstract:
Solid-gas reactions and in situ powder X-ray diffraction investigations of trinuclear silver complexes {[3,4,5-(CF3)3Pz]Ag}3 and {[4-Br-3,5-(CF3)2Pz]Ag}3 supported by highly fluorinated pyrazolates reveal that they undergo intricate ethylene-triggered structural transformations in the solid-state producing dinuclear silver-ethylene adducts. Despite the complexity, the chemistry is reversible producing precursor trimers with the loss of ethylene. Less reactive {[3,5-(CF3)2Pz]Ag}3 under ethylene pressure and low-temperature conditions stops at an unusual silver-ethylene complex in the trinuclear state, which could serve as a model for intermediates likely present in more common trimer-dimer reorganizations described above. Complete structural data of three novel silver-ethylene complexes are presented together with a thorough computational analysis of the mechanism.
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