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Protonation susceptibility and fragmentation capability of functional groups in chemical ionization mass spectrometry of simple bifunctional compounds. Semi-quantitative interpretation of spectra

✍ Scribed by Hisao Nakata; Kenji Kadoguchi; Hideyuki Konishi; Naohito Takeda; Akira Tatematsu

Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 320 KB
Volume: 28
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210280203

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✦ Synopsis

Positive-ion, methane-mediated chemical ionization mass spectra were measured for simple bifunctional aromatic compounds of the type m-XCH,C,H,CH,Y, where X = NH, and N(CH,),, and Y = OH and OCH,. Essentially only three peaks of ions, I MH] +, [ MH -XH 1 + and [ MH -YH I +, have appeared for each compound.

Since the two functional groups XCH,-and YCH,-do not interact with each other after protonation or after fragmentation, they are assumed to be protonated and to undergo fragmentations independently. The relative protonation susceptibility and fraction of fragmenting [ MHJ + can be estimated for each functional group in these compounds. A semiquantitative interpretation of the observed spectra is presented.

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