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15–19 Sept 2025
DESY
Europe/Berlin timezone

H···H Dihydrogen Bonding in Alkylsilane–Fluoromethane Complexes Observed by Microwave Spectroscopy

17 Sept 2025, 14:30
30m
DESY

DESY

Invited talk

Speaker

Weixing Li (Department of Chemistry, Fudan University)

Description

Dihydrogen bonds (DHBs) are non-covalent interactions characterized by the X–Hᵟ⁺⋯ᵟ⁻H–Y motif, where X is an electronegative atom and Y an electropositive center (e.g. transition metals). In this work, we investigate DHB formation in clusters of multifluoromethanes (acting as proton donors) with trimethylsilane (TMS) and triethylsilane (TES) as hydrogen bond acceptors. Using chirped-pulse Fourier transform microwave (CP-FTMW) spectroscopy, we unambiguously identified DHBs via rotational transitions. Notably, spectral splittings reveal quantum tunneling dynamics in these complexes, indicating coherent interconversion between degenerate configurations.

Keywords dihydrogen bonds · cluster chemistry · rotational spectra · quantum tunneling · silane
This abstract is submitted for.... HBond 2025 conference

Primary author

Weixing Li (Department of Chemistry, Fudan University)

Co-authors

Shizhuo Zhang (Department of Chemistry, Fudan University) Yue Liang (Department of Chemistry, Fudan University)

Presentation materials

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