Electrospray ionization mass spectrometric study of mercury complexes of N-heterocyclic carbenes derived from 1,2,4-triazolium salt precursors

• Authors: Rafał Frański , Błażej Gierczyk , Grzegorz Schroeder , Stefan Pieper , Andreas Springer , Michael Linscheid
• Languages of publication: EN

Abstracts

EN

By mixing 1,2,4-triazolium salts (precursors of N-heterocyclic carbenes 1–6) with mercury acetate, a number of complexes have been obtained under electrospray ionization condition. Carbenes 1 and 2 contain one carbene center; therefore, they are able to bond only one mercury cation. Carbenes 3–5 contain two carbene centers; therefore, they can bond two mercury cations. Mercury complexes of 1–5 always contain an acetate anion attached to a mercury cation. Carbene 6 also contains two carbene centers; however, its structure allows formation of a complex containing mercury bonded simultaneously to both centers, therefore, the complex that does not contain an acetate anion. The MS/MS spectra taken for complexes of carbenes 1–5 have shown formation of a cation corresponding to N1 substituent (adamantyl or benzyl), and those of complexes of carbenes 3–5 (doubly charged ions) have also shown the respective complementary partner ions. Mercury complex of 2 has yielded some other interesting fragmentation pathways, e.g. a loss of the HHgOOCCH3 molecule. The fragmentation pathway of the mercury complexes of 6 was found to be complicated.

Keywords

EN

N-heterocyclic carbene complexes; electrospray ionization mass spectrometry; fragmentation pathways

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2007
• Volume: 5
• Issue: 1
• Pages: 316-329

Dates

published

1 - 3 - 2007

online

1 - 3 - 2007

Contributors

author

Rafał Frański

• Faculty of Chemistry, Adam Mickiewicz University, 60-780, Poznań, Poland

author

Błażej Gierczyk

• Faculty of Chemistry, Adam Mickiewicz University, 60-780, Poznań, Poland

author

Grzegorz Schroeder

• Faculty of Chemistry, Adam Mickiewicz University, 60-780, Poznań, Poland

author

Stefan Pieper

• Department of Chemistry, Humboldt University Berlin, 12489, Berlin, Germany

author

Andreas Springer

• Department of Chemistry, Humboldt University Berlin, 12489, Berlin, Germany

author

Michael Linscheid

• Department of Chemistry, Humboldt University Berlin, 12489, Berlin, Germany

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Identifiers

DOI

10.2478/s11532-006-0050-0