Application of mass spectrometry on spherical ion trap for the identification of cluster boron compounds

presentation

English

Mass spectrometry is very powerful tool for the analysis of organic and organometallic compounds. Especially in the "organic" world the fragmentation rules have been worked out precisely [1] and if the library search is unsuccessful, then the compound structure could be deduced by interpretation of mass spectra. In spite of the fact than there exist similarities between carbon and boron compounds, the application of mass spectrometry in the field of cluster boron compounds in several times revealed surprisingly different behaviour of these compounds [2]. In this study we focus our attention on the tandem mass spectrometry of carboranes on spherical ion trap with electrospray ionization. The results were used for the structure confirmation of newly synthesized boranes and heteroboranes and for the identification of undesirable by-products and impurities in the reaction mixtures. Fragmentation of selected model compounds was studied in details and fragmentation routes have been described. The interpretation of product mass spectra was complicated by the multiplets resulting from the borone isotopic distribution, overlayed by peaks resulting due to non-specific sequential hydrogen losses. Inhibition of fragmentation in presence of selected cations was also observed.

boron cluster compounds, electrospray ionization, ion trap

ČÁSLAVSKÝ, J.; ŘIHÁK, P.

13. 10. 2008

Universita Komenského

Bratislava

978-80-223-2557-8

XIXth Slovak-Czech spectroscopic conference: Book of abstracts

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