Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Hilton M. Weiss"'
Autor:
Kim M. Touchette, Hilton M. Weiss
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :1523-1528
The addition of 0.1 M quaternary ammonium bromide to a solution of 20% trifluoroacetic acid in methylene chloride causes a large rate increase in the reaction of non-conjugated alkynes. The initial vinyl bromide product reacts further to provide a mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36e5828b23a7b41b135d58557befc573
https://doi.org/10.1039/a703569a
https://doi.org/10.1039/a703569a
Autor:
Hilton M. Weiss, Kim M. Touchette
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :1517-1522
The addition of 0.1 M quaternary ammonium halide to a solution of 20% trifluoroacetic acid in methylene chloride causes a large rate increase in the reaction of simple alkenes leading to a mixture of alkyl halides and trifluoroacetates. The mechanism
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14f4911cc98b495febb68ac4cf53000e
https://doi.org/10.1039/a703570e
https://doi.org/10.1039/a703570e
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :756-758
The reaction of oct-4-yne with 20% trifluoroacetic acid and a variety of relatively weak nucleophiles in methylene chloride was found to produce a mixture of anion incorporated and solvent incorporated products. The rates of these reactions with a ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfebaf00cefeee6fbecb06a7f9156b74
https://doi.org/10.1039/b111724f
https://doi.org/10.1039/b111724f
Autor:
Hilton M. Weiss
Publikováno v:
ChemInform. 22
Some novel methyl- and ethyl-substituted dimers of 2,4-diphenylcyclopentadienones have been detected. Their enthalpies- of dimerization have been determined and compared with values calculated by molecular mechanics. The steric demands of this dimeri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::295ce427d1184c6b9e28ba513e857eed
https://doi.org/10.1002/chin.199128058
https://doi.org/10.1002/chin.199128058
Autor:
Kim M. Touchette, Hilton M. Weiss
Publikováno v:
ChemInform. 29
The addition of 0.1 M quaternary ammonium bromide to a solution of 20% trifluoroacetic acid in methylene chloride causes a large rate increase in the reaction of non-conjugated alkynes. The initial vinyl bromide product reacts further to provide a mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b46572ad23c533e3d011ea0e16dc421
https://doi.org/10.1002/chin.199836093
https://doi.org/10.1002/chin.199836093
Publikováno v:
Organicbiomolecular chemistry. 1(12)
In a weakly acidic solution, the addition of HBr to 1-phenylprop-1-yne produces predominantly the anti-Markovnikov product. In this paper, we consider five possible explanations for this behavior and conclude that the concerted addition is occurring
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c753b0c5617b5a0aa206aab64d928450
https://pubmed.ncbi.nlm.nih.gov/12945906
https://pubmed.ncbi.nlm.nih.gov/12945906
Autor:
Hilton M. Weiss
Publikováno v:
Journal of Chemical Education. 87:1355-1356
A vast majority of polar additions of Bronsted acids to alkynes involve a termolecular transition state. With strong acids, considerable positive charge is developed on carbon and Markovnikov addition predominates. In less acidic solutions, however,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfdf8815f3cb30bb98cab7bbe37c5443
https://doi.org/10.1021/ed900012v
https://doi.org/10.1021/ed900012v
Autor:
Hilton M. Weiss
Publikováno v:
Journal of Chemical Education. 85:1218
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa0bdce8372f73d5e702112c3a1fef2c
https://doi.org/10.1021/ed085p1218
https://doi.org/10.1021/ed085p1218
Autor:
Hilton M. Weiss
Publikováno v:
Journal of Chemical Education. 84:440
Many organic reactions are catalyzed by strong acids or bases that protonate or deprotonate neutral reactants leading to reactive cations or anions that proceed to products. In enzyme reactions, only weak acids and bases are available to hydrogen bon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::703658f47b742730fbb9465c0a66dd27
https://doi.org/10.1021/ed084p440
https://doi.org/10.1021/ed084p440
Publikováno v:
Organic & Biomolecular Chemistry. 1:2148
The reaction of aryl alkynes with dilute methylene chloride solutions of quaternary ammonium bromide and 20% trifluoroacetic acid produces primarily the syn Markovnikov adducts of hydrogen bromide. At moderate concentrations of the bromide, the princ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c6df045c8148e0183848ca2cbb48008
https://doi.org/10.1039/b300042g
https://doi.org/10.1039/b300042g