✦ LIBER ✦

Gas-phase Ion-Molecule Reactions of Trimethyl Phosphite with the Phosphonium Ion OP(OCH3)2+ in a Quadrupole Ion Trap

✍ Scribed by Morizur, J.-P.; Gevrey, S.; Luna, A.; Taphanel, M.-H.

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 334 KB
Volume: 32
Category: Article
ISSN: 1076-5174
DOI: 10.1002/(sici)1096-9888(199705)32:5<550::aid-jms509>3.0.co;2-7

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✦ Synopsis

The gas-phase ion-molecule reactions of the phosphonium ion formed by electron impact with OP(OCH 3 ) 2 ' neutral trimethyl phosphite were studied with the use of a quadrupole ion trap (QIT) mass spectrometer. Observed reactions include competing methoxy transfers between and the neutral species to yield a phos-OP(OCH 3 ) 2 ' phenium ion or a tetracoordinate phosphorus ion Background water in the QIT gives an :P(OCH 3 ) 2 ' P(OCH 3 ) 4 '. adduct with which protonates neutral trimethyl phosphite, as shown by triple mass spectrometric OP(OCH 3 ) 2 ' experiments. High-level ab initio calculations and chemical ionization reactions were performed to investigate the unimolecular loss of methanol from protonated trimethyl phosphite.

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