Neutral cumulene oxide CCCCO is accessible by one-electron oxidation of [CCCCO]-* in the gas phase |
| |
Authors: | Fitzgerald Mark McAnoy Andrew M Bowie John H Schröder Detlef Schwarz Helmut |
| |
Institution: | Department of Chemistry, University of Adelaide, South Australia 5005. |
| |
Abstract: | Calculations at the CCSD(T)/aug-cc-pVDZ//B3LYP/6-31G* level of theory indicate that doublet CCCCO]-* is a stable species which should undergo collision-induced Franck-Condon vertical oxidation under neutralisation-reionisation conditions (-NR+) to produce both triplet CCCCO (ground state) and singlet CCCCO. Some of the neutral CCCCO species formed (particularly the triplet) should be stable for the microsecond duration of the NR experiment, whereas others will be energised (particularly the singlet) and should decompose to C3 and CO. The CCCCO]-* radical anion has been formed in the ion source of the mass spectrometer by the reaction CH3OCH2Ctriple bond]C-CO-CH(CH3)2 + O-* --> CCCCO]-* + CH3O* + H2O + (CH3)2CH*. The -NR+ spectrum of CCCCO]-* shows a recovery signal at m/z 64 corresponding to ionised CCCCO, together with a pronounced peak at m/z 36 (CCC+*) produced by ionisation of CCC (formed by the reaction CCCCO --> CCC + CO). The experimental observations are in agreement with the predictions of the theoretical study. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|