Sucrose mass spectrum

The fragmentation pattern of 2,3,6,l, 3, 4, 6 -hepta-0-acetyl-4-0-(trideuterioacetyl)sucrose (79) and 2,3,4,6,l, 3, 6 -hepta-0-acetyl-4 -0-(trideuterioacetyl)sucrose (80) has been described.44 The mass spectrum of compound 79 contains fragment ions corresponding to the two oxycarbonium ions (81) and (82). Likewise, for 80, ions 83 and 84 were observed. For compound 79, the hexopyranosyl cat-... 

Figure 7. Non resonant multiphoton ionization mass spectrum and breakdown pattern of sucrose.

Table 2. Mass spectrum observed for the degradation product identified as phenyl from the condensation product of sucrose and diphenyltin dichloride compared with generated data of the mass spectrum of benzene...

Figure 2.3. Electrospray mass spectrum of sucrose obtained with a single quadrupole mass spectrometer (Thermo Electron) operated in the positive-ion mode. Fragmentation was achieved by in-source collisionally induced dissociation. The post-column addition of submillimolar LiCl to the analyte solution facilitated the formation of lithium adducts. (Reprinted from Ref. 28, with permission.)...

The structures of vanicosides A (1) and B (2) and hydropiperoside (3) were established primarily by one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy techniques and fast atom bombardment (FAB) mass spectrometry (MS).22 The presence of two different types of phenylpropanoid esters in 1 and 2 was established first through the proton (4H) NMR spectra which showed resonances for two different aromatic substitution patterns in the spectrum of each compound. Integration of the aromatic region defined these as three symmetrically substituted phenyl rings, due to three p-coumaryl moieties, and one 1,3,4-trisubstituted phenyl ring, due to a feruloyl ester. The presence of a sucrose backbone was established by two series of coupled protons between 3.2 and 5.7 ppm in the HNMR spectra, particularly the characteristic C-l (anomeric) and C-3 proton doublets... 

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