Helm, H. Nath, unpublished results. [7] X-ray structure analysis of 3a: C22H26BCI,NTi.0.5CH2C12, M=547.5; single crystal 0.22 x 0.30 x 0.30 mm'; monoclinic, P2,/n, a = 10.672(4), b = 12.079(3), ~=21.179(3) A, b= 101.93(3)", V=2671 A' , Z = 4 , pLIClrd=1.36 g cm-'. p(MoKa)=8.33 cm-', 28=2-50" in h k
The generation and identification of triplet vinylidene, [H2CC]:, by neutralization-reionization mass spectrometry
✍ Scribed by Detlev Sülzle; Helmut Schwarz
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 277 KB
- Volume
- 156
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Neutralization of a beam of vinylidene anions, [ CH,-C] -., by xenon gives rise to a stable CIHz species, having a lifetime 2 0.4 us. Re-ionization with oxygen generates a species which is identified byits collisional activation mass spectrum as the vinylidene radical cation, [CH+Z] +..
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## The vinylidene cation, [CHyC] t,wasgenerared as a wmsient species by collisionally induced chqe revers31 of the corresponding anion. The cotlisionallf induced mass spectrum of the transienr (CHz=C]z is chvactzrisrically different from that of ionised acetylene.
Experiments are reported on the successful gas-phase generation of butatrienylidene H,C-CC-C: using the technique of neutralization-reionization mass spectrometry.
The efficiency of the neutralization step in neutralization-reionization mass spectrometry was examined in detail. Collisionat charge exchange between a large number of common organic and inorganic cations and He, N, , H, , SF,, CH, , Xe, 0, , cyclo-C,H, and NO revealed that the energy defect for t
The collision-induced dissociation characteristics of the beazyl, tropyl and tolyl cations which sewe to identify these [C,H71+ isomers (the m/z 74-77 relative abundance@ were not preserved in their neutralizatiou-reionization (NR) mass spectra. However, analyses of mixtures of the [C,H,]+ isomers m