Molecular structure of dimeric iron trichloride in the vapour phase as determined by electron diffraction

M. Hargittai, János Tremmel, I. Hargittai

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Abstract

The molecular structure of the title compound has been determined by gas-phase electron diffraction, the vapour composition being obtained by quadrupole mass spectrometry. The experimental data can best be approximated by a model with a puckered four-membered ring (C2v symmetry). This deviation from D2h symmetry may be a consequence of large-amplitude vibrations around an imaginary axis connecting the two bridging chlorine atoms. The bond lengths and angles for the puckered-ring model are ra(Fe-Cl) (terminal) 2.127(4), ra(Fe-Cl) (bridge) 2.326(5) Å, Clt-Fe-Clt 124.3(7), and Clb-Fe-Clb 90.7(4)°. The bond lengths and force constants indicate that the terminal Fe-Cl bonds are considerably stronger than the bridging ones.

Original languageEnglish
Pages (from-to)87-89
Number of pages3
JournalJournal of the Chemical Society, Dalton Transactions
Issue number1
DOIs
Publication statusPublished - 1980

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Bond length
Electron diffraction
Molecular structure
Iron
Vapors
Chlorine
Mass spectrometry
Gases
Atoms
Chemical analysis

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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abstract = "The molecular structure of the title compound has been determined by gas-phase electron diffraction, the vapour composition being obtained by quadrupole mass spectrometry. The experimental data can best be approximated by a model with a puckered four-membered ring (C2v symmetry). This deviation from D2h symmetry may be a consequence of large-amplitude vibrations around an imaginary axis connecting the two bridging chlorine atoms. The bond lengths and angles for the puckered-ring model are ra(Fe-Cl) (terminal) 2.127(4), ra(Fe-Cl) (bridge) 2.326(5) {\AA}, Clt-Fe-Clt 124.3(7), and Clb-Fe-Clb 90.7(4)°. The bond lengths and force constants indicate that the terminal Fe-Cl bonds are considerably stronger than the bridging ones.",
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AU - Hargittai, M.

AU - Tremmel, János

AU - Hargittai, I.

PY - 1980

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N2 - The molecular structure of the title compound has been determined by gas-phase electron diffraction, the vapour composition being obtained by quadrupole mass spectrometry. The experimental data can best be approximated by a model with a puckered four-membered ring (C2v symmetry). This deviation from D2h symmetry may be a consequence of large-amplitude vibrations around an imaginary axis connecting the two bridging chlorine atoms. The bond lengths and angles for the puckered-ring model are ra(Fe-Cl) (terminal) 2.127(4), ra(Fe-Cl) (bridge) 2.326(5) Å, Clt-Fe-Clt 124.3(7), and Clb-Fe-Clb 90.7(4)°. The bond lengths and force constants indicate that the terminal Fe-Cl bonds are considerably stronger than the bridging ones.

AB - The molecular structure of the title compound has been determined by gas-phase electron diffraction, the vapour composition being obtained by quadrupole mass spectrometry. The experimental data can best be approximated by a model with a puckered four-membered ring (C2v symmetry). This deviation from D2h symmetry may be a consequence of large-amplitude vibrations around an imaginary axis connecting the two bridging chlorine atoms. The bond lengths and angles for the puckered-ring model are ra(Fe-Cl) (terminal) 2.127(4), ra(Fe-Cl) (bridge) 2.326(5) Å, Clt-Fe-Clt 124.3(7), and Clb-Fe-Clb 90.7(4)°. The bond lengths and force constants indicate that the terminal Fe-Cl bonds are considerably stronger than the bridging ones.

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