Imidazol-2-ylidene: Generation of a Missing Carbene and Its Dication by Neutralization - Reionization and Charge-Stripping Mass Spectrometry

Angewandte Chemie (International Edition in English)

Volumn 36, Issue 13-14, 1997, Pages 1478-1481

  McGibbon, Graham A ^a,c   Heinemann, Christoph ^a,b   Lavorato, David J ^d   Schwarz, Helmut ^a  

^a TECHNISCHE UNIVERSITÄT BERLIN   (Germany)

^b MCMASTER UNIVERSITY   (Canada)

^c SANOFI   (France)

^d Baranger Research Ltd   (Canada)

Author keywords

Carbenes; Cations; Imidazolylidenes; Mass spectrometry

Indexed keywords

EID: 0030768538     PISSN: 05700833     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.199714781     Document Type: Article

References (53)

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2. 2 through mass spectrometry are summarized in: D. Schröder, H. Schwarz, Int. J. Mass Spectrom. Ion Processes 1995, 146/147, 183.
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4. Since the first isolation of "stable" carbenes: A. J. Arduengo III, R. L. Harlow, M. Kline, J. Am. Chem. Soc. 1991, 113, 361, the field has expanded rapidly and a précis of the "incredible renaissance" in this area can be found in: M. Regitz, Angew. Chem. Int. Ed. Engl. 1996, 35, 725; Angew. Chem. 1996, 108, 791.
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53. 1 at McMaster). Alternatively, when the recovery ions (m/z 68) were selectively transmitted by the sector and then passed through another oxygen-filled collision cell (70% transmission) the resulting CID products could be analyzed by using the last sector. The NR/CID mass spectrum so obtained is characteristic of only the species surviving neutralization and reionization. Mass spectra of doubly charged ions (NR/CS) were also obtained in the same manner. Comparative collision-induced dissociation (CID) and charge-stripping (CS) experiments were performed with the deflector electrode switched off.