Abstract
A route to efficient generation of C6H4+., potentially the benzyne radical cation, is presented. Laser vaporization of Mg+. and supersonic expansion in helium doped with o-, m-, or p-C6H4F2 yields, among other ions, o-, m-, p-C6H4F2Mg+. complexes, but no C6H4+.. Collision-induced dissociation experiments show that the o-C6H4F2Mg +. complex can be converted into C6H4 +. in a mildly energetic collision, with a center-of-mass energy around 1-2 eV. These conditions can also be reached in the ion source when argon is used as a carrier gas. In this way, mass spectra containing the desired m/z 76 peak, i.e. C6H4+., are obtained.
| Original language | English |
|---|---|
| Pages (from-to) | 1479-1481 |
| Number of pages | 3 |
| Journal | Rapid Communications in Mass Spectrometry |
| Volume | 18 |
| Issue number | 13 |
| DOIs | |
| State | Published - 2004 |
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