Novel approach to separation and identification of organometallic compounds in complex mixtures by means of particle beam liquid chromatography/mass spectrometry: the case of diphosphine-substituted selenido iron and ruthenium clusters
✍ Scribed by M. Careri; C. Graiff; A. Mangia; P. Manini; G. Predieri
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 135 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0951-4198
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✦ Synopsis
The particle beam liquid chromatography/mass spectrometry (PB LC/MS) characterization of diphosphine-substituted selenido iron and ruthenium clusters is reported. The clusters considered result from the reaction between the diphosphine diselenides (Ph 2 PSe) 2 R [R = CH 2 , dppmSe 2 ; R = CH 2 CH 2 , dppeSe 2 ; R = (C 5 H 4 ) 2 Fe, dppfcSe 2 ] and Fe 3 (CO) 12 and Ru 3 (CO) 12 . Complex reaction mixtures were separated under adsorption chromatographic conditions and characterized on-line by means of the positive-ion and negative-ion chemical ionization mass spectra of the eluates. The PB LC/MS analysis of the crude reaction mixtures proved useful, avoiding sample manipulation and/or sample degradation; this is particularly important for those compounds sensitive to oxygen or light, or which are unstable in solution. The spectra obtained showed characteristic fragmentation patterns and detailed structural information.