Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Kami K. Thoen"'
Publikováno v:
International Journal of Mass Spectrometry. :511-520
In order to investigate competition between radical substitution and addition reactions, the gas-phase reactivity of phenyl radicals bearing a chemically inert, positively charged group and a neutral substituent (CH3, Cl, or Br), both at a meta posit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95335ec5973fa01719a55d615b2aca87
https://doi.org/10.1016/s1387-3806(01)00452-3
https://doi.org/10.1016/s1387-3806(01)00452-3
Autor:
Hilkka I. Kenttämaa, and Leo Guler, Luis E. Ramírez-Arizmendi, Jenny L. Heidbrink, Kami K. Thoen
Publikováno v:
The Journal of Physical Chemistry A. 105:7875-7884
The rate of hydrogen atom abstraction from tributyltin hydride, benzeneselenol, thiophenol, and tetrahydrofuran was measured in the gas phase for charged phenyl radicals with different neutral substituents at the meta- or ortho-position. A charged py
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b32ae91fdfbfcba571bc22184c1e4a4b
https://doi.org/10.1021/jp0103676
https://doi.org/10.1021/jp0103676
Autor:
Hilkka I. Kenttämaa, Joseph J. Ferra, Kami K. Thoen, Shane E. Tichy, Jason M. Price, Chris Petucci
Publikováno v:
The Journal of Organic Chemistry. 66:2726-2733
Polar effects are demonstrated to be a key factor in controlling the reactivities of related charged phenyl radicals in different exothermic atom and group abstraction reactions in the gas phase. The effects of various meta substituents on the phenyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20e35a7bd5639f709c74857f1d2abc79
https://doi.org/10.1021/jo001634r
https://doi.org/10.1021/jo001634r
Publikováno v:
Tetrahedron Letters. 41:4019-4024
1,4-Didehydronaphthalene, generated by thermolysis of 1,2-diethynylbenzene, reacts with organic hydrogen atom donors via hydrogen atom abstraction. The resulting naphthyl radical undergoes the expected abstraction of a hydrogen atom from a second hyd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9142b63199d9e17abe2c8a375f912d4
https://doi.org/10.1016/s0040-4039(00)00575-x
https://doi.org/10.1016/s0040-4039(00)00575-x
Publikováno v:
The Journal of Organic Chemistry. 65:645-651
The ability of differently substituted charged phenyl radicals (a class of distonic radical cations) to abstract an iodine atom from allyl iodide was systematically examined in the gas phase by using Fourier transform ion cyclotron resonance mass spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d658259de250c723c26a0c8199bab82
https://doi.org/10.1021/jo981911i
https://doi.org/10.1021/jo981911i
Autor:
Hilkka I. Kenttämaa, Kami K. Thoen
Publikováno v:
Journal of the American Chemical Society. 121:800-805
Fourier transform ion cyclotron resonance mass spectrometry has been employed to systematically investigate the intrinsic (solvent-free) reactivity of a 1,3-dehydrobenzene (m-benzyne) with a pyridinium charge site in the 5-position. The m-benzyne was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0869466d8bbd20018e76e6ea3066de81
https://doi.org/10.1021/ja982627b
https://doi.org/10.1021/ja982627b
Publikováno v:
Journal of the American Society for Mass Spectrometry. 9:1135-1140
The feasibility of generating substituted phenyl radicals and biradicals (with a charged substituent) in the gas phase by laser photolysis was examined by using a Fourier-transform ion cyclotron resonance mass spectrometer. The precursors were genera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7036263e93ed6a35d048e581a9ec85ae
https://doi.org/10.1016/s1044-0305(98)00097-x
https://doi.org/10.1016/s1044-0305(98)00097-x
Publikováno v:
The Journal of Organic Chemistry. 63:4470-4474
Molecular orbital calculations (at the Becke3LYP/6-31G(d) level of theory) indicate that the distonic ion •CH2C(CH2)CO+ is planar and has C2v symmetry. Most of the positive charge resides at the carbonyl carbon while the odd spin is delocalized ove
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4761ef2bcac79008d503ff89473e1bb
https://doi.org/10.1021/jo9804691
https://doi.org/10.1021/jo9804691
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 175:173-177
The reactivity of the dimethylene ketene radical cation (a distonic ion) toward organic disulfides was examined inside a Fourier-transform ion cyclotron resonance mass spectrometer. The radical cation efficiently cleaves the disulfide bond in all the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::480bb321f72446b6ef7a1f87f93cbc31
https://doi.org/10.1016/s0168-1176(98)00116-5
https://doi.org/10.1016/s0168-1176(98)00116-5
Publikováno v:
Journal of the American Chemical Society. 120:3792-3798
The 2,6- and 3,5-dimethylenepyridinium biradical ions were generated and structurally characterized in the gas phase by using Fourier transform ion cyclotron resonance mass spectrometry. Their reactivity was examined toward several commonly used spin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29835b38b49d9c1c3e81b053be8c4950
https://doi.org/10.1021/ja974159w
https://doi.org/10.1021/ja974159w