Electronic spectra of C₄H₃Cl+ isomers

摘要

Two experimental methods were applied to identify the structure and electronic transitions of C₄H₃Cl+ isomers. The first is a direct absorption technique where mass-selected ions are embedded in 6 K neon matrices using a mass-selected ion beam and absorption spectra of different C₄H₃Cl+ isomers were thus observed. The second is a gas phase method on ions which have been collisional cooled with cryogenic helium inside of a 22-pole ion trap. The c-type (1)2 A′ ← X 2 A″ electronic transition of a C₄H₃Cl+ isomer could then be measured by a one-colour, two-photon technique at 20 and 50 K in the gas phase. The two sets of data, complemented by calculated excitation energies, allowed the assignment of particular isomers. Rotational structure in the gas phase spectra was resolved for C₄H₃ 35Cl+ and C₄H₃ 37Cl+ isomers of cis-1-chlorobutenynylium. The analysis leads to the spectroscopic constants: T ₀₀ = 19 184.680(5), , , , , and (all in cm−1).View full textDownload full textKeywordselectronic spectroscopy, ion trap, matrix spectroscopyRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00268976.2012.697584