Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Randal A. Seburg"'
Publikováno v:
Helvetica Chimica Acta. 92:1626-1643
Mechanistic and spectroscopic investigations of reactive C3H2 hydrocarbons necessitated the preparation of diazopropyne isotopomers bearing mono-13C substitution at each of the three unique positions. The diazo compounds and their tosylhydrazone prec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c616a9d201a73a6f92b8a040a6bc73d7
https://doi.org/10.1002/hlca.200800446
https://doi.org/10.1002/hlca.200800446
Publikováno v:
Journal of the American Chemical Society. 131:9442-9455
Spectroscopic data for triplet isotopomers H-C-C-C-H, H-(13)C-C-C-H, and H-C-(13)C-C-H are consistent with computational predictions for a symmetric structure in which the terminal carbons are equivalent (C(2) or C(2v)) and are inconsistent with a pl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec296bcaf0197cd1385db9ab399b7b3a
https://doi.org/10.1021/ja901606a
https://doi.org/10.1021/ja901606a
Publikováno v:
Journal of Pharmaceutical Sciences. 95:1954-1966
A novel group transfer reaction is reported in which a drug molecule undergoes a thermally induced 2-methyl-2-yl-propionic acid group transfer from one drug molecule to the carboxylic acid functional group of another. The resulting product, the 2-car
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ee003afce0a673a231b37cb56e94e36
https://doi.org/10.1002/jps.20659
https://doi.org/10.1002/jps.20659
Publikováno v:
Analytical Chemistry. 78:6595-6600
A method utilizing thermal desorption mass spectrometry (TDMS) for the detection and quantitation of free acid forms in pharmaceutical drug products formulated as salts is presented. Selective detection of neutral drug forms is possible because the v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a533ff841cfac3044f28e691b9df4c3b
https://doi.org/10.1021/ac060844m
https://doi.org/10.1021/ac060844m
Autor:
Jonathan A. Hodges, Robert J. Halter, John F. Stanton, Christopher S Simmons, Randal A. Seburg, Robert J. McMahon, Nathan P. Bowling, Phillip S. Thomas
Publikováno v:
Journal of the American Chemical Society. 128:3291-3302
1-Diazo-2,4-pentadiyne (6a), along with both monodeuterio isotopomers 6b and 6c, has been synthesized via a route that proceeds through diacetylene, 2,4-pentadiynal, and 2,4-pentadiynal tosylhydrazone. Photolysis of diazo compounds 6a-c (lambda > 444
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3fb1fbea4dc776cd0557bcfcce257c3
https://doi.org/10.1021/ja058252t
https://doi.org/10.1021/ja058252t
Publikováno v:
Tetrahedron. 56:6877-6885
The solid-state chemistry of amorphous and crystalline forms of a novel cationic 1-β-methyl carbapenem antibiotic 2 is described. The lyophilized chloride salt of 2 ( 2 ·Cl) is amorphous and exhibits moisture-dependent β-lactam hydrolysis rates. H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7afd576f8a9b80520330d968e70991ed
https://doi.org/10.1016/s0040-4020(00)00509-3
https://doi.org/10.1016/s0040-4020(00)00509-3
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :2249-2256
The gas-phase synthesis and characterization of phenylcarbene anion, PhCH˙– (1˙–), are reported. This archetypal arylcarbene radical anion is produced in isomerically-pure form by dissociative electron ionization of phenyldiazirine in a flowing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4281f17a97b753c28176922332c5dd40
https://doi.org/10.1039/a905870b
https://doi.org/10.1039/a905870b
Autor:
Randal A. Seburg, Robert R. Squires
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. :541-557
The electron affinity of cyclopropyl radical (cC3H5.) has been derived using a single reference variant of the Cooks kinetic method. Thiocarboxylate anions (RCOS: RPhCH2, CH2CH, CH2CHCH2, CH3C(O), and cC3H5) were synthesized in a heliu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2458ba1f4c516a5bf1fb73d9296293af
https://doi.org/10.1016/s0168-1176(97)00101-8
https://doi.org/10.1016/s0168-1176(97)00101-8
Publikováno v:
Journal of the American Chemical Society. 119:10838-10845
Five isomers of the carbon-rich molecule C5H2 are investigated computationally, using methods based on the coupled-cluster approximation. All of these structures are related to isomers of C3H2 via substitution of hydrogen by ethynyl or attachment of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fecec29aef5db61e1b8640cf5f5a2d0
https://doi.org/10.1021/ja971412j
https://doi.org/10.1021/ja971412j
Autor:
Robert R. Squires, Lee S. Sunderlin, Brian T. Hill, John C. Poutsma, Leonard J. Chyall, Jun Hu, Randal A. Seburg
Publikováno v:
Rapid Communications in Mass Spectrometry. 11:489-493
The design and implementation of a simple electrospray ionization source for a flowing afterglow/triple quadrupole device are described. Ions can be electrosprayed directly into the room temperature flow tube through a heated capillary without the ne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7523aef5f710d9b8ed45b2062a9525b1
https://doi.org/10.1002/(sici)1097-0231(199703)11:5<489::aid-rcm896>3.0.co
https://doi.org/10.1002/(sici)1097-0231(199703)11:5<489::aid-rcm896>3.0.co