A Quantitative Approach of the Interaction between Metal Triflates and Organic Ligands Using Electrospray Mass Spectrometry

作者：Gal Jean Francois^*; Iacobucci Claudio; Monfardini Ilaria; Massi Lionel; Dunach Elisabet; Olivero Sandra

来源：Journal of the American Society for Mass Spectrometry, 2012, 23(12): 2059-2062.

DOI：10.1007/s13361-012-0484-x

• Lewis acids
• Basicity
• Metal triflates
• Ligand competition
• Catalysis

The interaction between two Lewis %26quot;superacid%26quot; catalysts Zn(OTf)(2) and In(OTf)(3) and series of amide and phosphate ligands is quantitatively characterized by electrospray ionization mass spectrometry (ESI-MS). A specific feature of the ESI-MS spectra of the mixture of metal triflates and Lewis bases is the formation of ionic adducts resulting from the displacement of one triflate anion by two neutral ligands. A ligand competition model is developed, which describes the relative intensities of the ionic adducts as a function of relative ligand concentrations. The relative affinities deduced from the ligand competition method are combined in an affinity scale for the metal triflate.

• 出版日期2012-12