Zobrazeno 1 - 10 of 17 pro vyhledávání: '"Darwin B. Dahl"'
1
Modeling Collaboration and Partnership in a Program Integrating NMR across the Chemistry Curriculum at a University and a Community and Technical College
Autor: Shawn Kellie, Rui Zhang, Lester L. Pesterfield, Darwin B. Dahl, Sue K. Ballard, Cathleen Webb, Donielle M. Lovell
Publikováno v: Journal of Chemical Education. 90:873-876
In this NSF-supported project, two Anasazi FT-NMRs are being integrated simultaneously across the chemistry curriculum at Western Kentucky University (WKU) and Elizabethtown Community and Technical College (ECTC). The collaborative project adds to a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5366ac0f1807851fadeedc446da5bf88
https://doi.org/10.1021/ed3007023
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2
Capillary zone electrophoretic separation of sulfonium and thiophenium ions
Autor: Francisco A. Valenzuela, Darwin B. Dahl, Thomas K. Green
Publikováno v: Journal of Chromatography A. 802:395-398
Capillary zone electrophoretic separation of sulfonium and thiophenium ions using phosphate buffer with TBA, pH 2.5, was investigated. Following their synthesis, 13 ions were synthesized and separated by this procedure. The benefits of speed and reso
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2051573ec086809643421d809deccf77
https://doi.org/10.1016/s0021-9673(97)01156-4
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3
Analysis of Hexene Isomers by a Modified Fieser Bromination Procedure
Autor: Claire Davies, William G. Lloyd, Darwin B. Dahl
Publikováno v: Microchemical Journal. 58:99-104
A modified stereospecific Fieser bromination of linear hexenes is described. The procedure eliminates the occurrence of decomposition products which are encountered using a previously published procedure. Dehydrobromination products ofvic-dibromohexa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::491ad3730bc0663199609a5af9696ad9
https://doi.org/10.1006/mchj.1997.1526
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4
The Pd(II)-catalyzed homogeneous isomerization of hexenes
Autor: Robin Hyden, Darwin B. Dahl, Margarita L. Kirova, William G. Lloyd, Claire Davies
Publikováno v: Journal of Molecular Catalysis A: Chemical. 123:91-101
The isomerization of linear hexenes in alcoholic media, catalyzed by low concentrations of PdCl 2 in the presence of CuCl 2 , has been examined. Effects of reagent concentrations, alcohol and temperature are noted. Values of the rate and equilibrium
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77e36ef697f4af5294289cbfa288795f
https://doi.org/10.1016/s1381-1169(97)00058-7
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6
Isomerization and oxidation of linear hexenes with methanolic Pd(II)
Autor: Darwin B. Dahl, William G. Lloyd, Margarita L. Kirova
Publikováno v: Journal of Molecular Catalysis. 88:301-310
1-Hexene, cis -2-hexene and trans -2-hexene all oxidize at the same rate at 30°C to yield 60–62% 2-hexanone along with 3-hexanone and hexanal. trans -3-Hexene reacts similarly, with the product mixture only slightly enriched (by ≈ 5%) in 3-hexan
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fdbb31ab3d15712086f3b8ae77c4a0ca
https://doi.org/10.1016/0304-5102(93)e0283-m
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7
ChemInform Abstract: Enantiomeric Separation of Sulfonium Ions by Capillary Electrophoresis Using Neutral and Charged Cyclodextrins
Autor: Darwin B. Dahl, Francisco A. Valenzuela, Thomas K. Green
Publikováno v: ChemInform. 29
Capillary zone electrophoresis was successfully applied, for the first time, to the chiral separation of structurally related sulfonium ions, using sodium phosphate buffer pH 2.5 with β-cyclodextrin (β-CD) or sulfated-β-cyclodextrin (S-β-CD) as t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48820d054f04f876ee74e5c2fa16715b
https://doi.org/10.1002/chin.199848274
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8
Synthesis and Separation of a Diastereomeric Sulfonium Ion by Capillary Zone Electrophoresis
Autor: Francisco A. Valenzuela, Darwin B. Dahl, Thomas K. Green
Publikováno v: Journal of Chemical Education. 75:1590
An undergraduate laboratory exercise utilizing capillary zone electrophoresis in the analysis of the student-synthesized sulfonium ion sec-butylmethyl-p-tolylsulfonium tetrafluoroborate is presented. The sulfonium ion contains two stereogenic centers
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e27cd239fa44593dc1f3978d32f985d6
https://doi.org/10.1021/ed075p1590
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9
Chromatographic Separation Techniques for Undergraduates
Autor: Thomas K. Green, Darwin B. Dahl, John T. Riley
Publikováno v: Journal of Chemical Education. 75:1209
For the past several years the Chemistry Department at Western Kentucky University (WKU) has sought to strengthen its undergraduate program by increasing undergraduate participation in research and providing the necessary background for students to e
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e00d206b7c62470b1bef24126979765
https://doi.org/10.1021/ed075p1209
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10
A forensic laboratory experiment: Who shot J.R.?
Autor: Darwin B. Dahl, Peter F. Lott
Publikováno v: Journal of Chemical Education. 68:1025
It is important to provide a motivation for performing experiments so as to pique student interest: this article profiles such a motivation used to frame a laboratory experiment for an Instrumental Analysis course.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1bbacdb63c70a19095c71e2ba1209c45
https://doi.org/10.1021/ed068p1025
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