Abstract
Several Di-Guerbet esters (DGE) suitable for lubricant applications were synthesized from branched Guerbet alcohols and Guerbet acids. The mass spectra of DGE under electron-ionization and positive chemical-ionization (PCI) conditions were recorded. Gas chromatography-mass spectrometry, especially in PCI mode with methane as reagent gas, is an effective method for analyzing DGE. In methane positive chemical-ionization mass spectrometry, the DGE give molecular ion peaks. In both PCI and EI modes, some other characteristic ions including up to four McLafferty rearrangement products with high m/z are observed. Thus identification of both hydrocarbon moieties is possible. The DGE were also characterized by 1H-and 13C nuclear magnetic resonance.
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Knothe, G., Carlson, K.D. Synthesis, mass spectrometry, and nuclear magnetic resonance characterization of Di-guerbet esters. J Amer Oil Chem Soc 75, 1861–1866 (1998). https://doi.org/10.1007/s11746-998-0342-y
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DOI: https://doi.org/10.1007/s11746-998-0342-y