Fragmentation Pathways of [MX2(CO)2(dcbpy)] (M = Ru, Os; X = Cl, Br, I; dcbpy = 2,2′-bipyridine-4,4′-dicarboxylic acid) Complexes
| Autor: | Janne Jänis, Pirjo Vainiotalo, Matti Haukka, Elina Laurila, Larisa Oresmaa, Minna Jakonen, Liubov Vlasova, Pipsa Hirva |
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| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Decarboxylation Carboxylic acid Electrospray ionization Organic Chemistry Photochemistry 2 2'-Bipyridine Dissociation (chemistry) Inorganic Chemistry chemistry.chemical_compound Dicarboxylic acid chemistry Fragmentation (mass spectrometry) Infrared multiphoton dissociation Physical and Theoretical Chemistry |
| Zdroj: | Organometallics. 29:1070-1078 |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/om900661t |
| Popis: | The gas-phase behavior and stability of [RuX2(CO)2(dcbpy)], [OsX2(CO)2(dcbpy)], and [OsI2(CO)2(mcbpy)] (X = Cl, Br, I; dcbpy = 2,2′-bipyridine-4,4′-dicarboxylic acid; mcbpy = 2,2′-bipyridine-4-carboxylic acid) were studied by electrospray ionization (ESI) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. Negative-ion ESI produced abundant singly and doubly deprotonated molecules for all of the compounds, without apparent changes in the metal atom oxidation state or the ligand coordination. The characteristic fragment ions resulting from the decarboxylation (loss of CO2) in one of the carboxylic acid substituents of the dcbpy ligand were also observed. The gas-phase fragmentation was investigated by means of collision-induced dissociation (CID) and infrared multiphoton dissociation (IRMPD) techniques. The most favored fragmentation pathway included the loss of CO2, followed by one or two decarbonylations. Fragmentation was observed to be both qualitatively and quantitatively dependent o... |
| Databáze: | OpenAIRE |
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