Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Desmond G. Hellier"'
Autor:
David C. Ayres, Desmond G. Hellier
A quick reference for information on chemicals of environmental importance, this dictionary has been carefully compiled and designed to make it useful for students. About 600 substances are covered in alphabetically arranged entries: these include so
Publikováno v:
Israel Journal of Chemistry. 20:133-136
Reaction of 1,1-diphenyl-propane-1,3-diol with thionyl-chloride gave a product, which was identified by X-ray analysis as 3,3-diphenyl-1,2-oxathiolane-2,2-dioxide. The compound crystallizes at room temperature in the monoclinic space group Pt/n with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e6f6363ded3cbc26258954cc23b7587
https://doi.org/10.1002/ijch.198000061
https://doi.org/10.1002/ijch.198000061
Publikováno v:
J. Chem. Soc., Perkin Trans. 2. :190-193
The conformational analysis of ethylene sulphites is discussed and for two sulphites an attempt is made to calculate the twist-envelope proportions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea230809bae226f2c3f843b7423767a2
https://doi.org/10.1039/p29750000190
https://doi.org/10.1039/p29750000190
Autor:
Desmond G. Hellier, Gerald W. Buchanan
Publikováno v:
Canadian Journal of Chemistry. 54:1428-1432
13C nmr chemical shifts for ethylene sulfite and 17 derivatives are presented. From the magnitudes of the γ shifts and the tenets of conformational analysis, support is gained for the existence of twist-envelope conformations in solution. Pseudorota
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e57ecce6e7dac32347c51b2193bde482
https://doi.org/10.1139/v76-204
https://doi.org/10.1139/v76-204
Publikováno v:
J. Chem. Soc., Perkin Trans. 2. :919-923
Reduction by LiAlH4 of 2,2,4,6,6-pentamethylheptane-3,5-dione gives a mixture of diastereoisomeric diols, which upon cyclisation with thionyl chloride yields a mixture of isomeric 4,6-di-t-butyl-5-methyl-1,3,2-dioxathiane 2-oxide. From the distributi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac336f114ae163177ed54123e727e036
https://doi.org/10.1039/p29890000919
https://doi.org/10.1039/p29890000919
Autor:
Desmond G. Hellier, H. G. Liddy
Publikováno v:
Magnetic Resonance in Chemistry. 26:671-674
Les sulfates cycliques a 6 chainons different des sulfites cycliques par le fait qu'ils n'existent pas sous la forme chaise rigide en solution a temperature ordinaire. L'effet anomere stabilise le cycle sulfite mais pour les sulfates trimethylenes, l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7692b8006afe4f7f64f9a40d0b5af821
https://doi.org/10.1002/mrc.1260260806
https://doi.org/10.1002/mrc.1260260806
Autor:
Frederick J. Webb, Desmond G. Hellier
Publikováno v:
J. Chem. Soc., Perkin Trans. 2. :612-616
The i.r. and Raman spectra of twenty-five methyl-substituted trimethylene sulphites (1,3,2-dioxathian 2-oxides) have been examined in the 1 400–250 cm–1 region. A number of bands have been assigned and appear to be characteristic of alkyl 1,3,2-d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1e94e3c45bfff9b0ba8816b92dc9c03
https://doi.org/10.1039/p29770000612
https://doi.org/10.1039/p29770000612
Autor:
Desmond G. Hellier, H. Glendon Liddy
Publikováno v:
Magnetic Resonance in Chemistry. 27:431-436
The stereoisomerism of some methyl-substituted 1,3,2-dioxathiepanes has been investigated by 13C and 17O NMR spectroscopy. The effects of substituents on the conformational equilibria of the seven-membered rings are discussed and compared with those
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::938aec7622f27a1635289a5f48ce8a9b
https://doi.org/10.1002/mrc.1260270503
https://doi.org/10.1002/mrc.1260270503
Autor:
Desmond G. Hellier, Frederick J. Webb
Publikováno v:
Organic Magnetic Resonance. 9:347-350
The high resolution proton magnetic resonance spectra of a series of cyclic inorganic esters and analogous 1,3-dioxans have been analysed. The coupling constants and chemical shifts involved indicate that most of the compounds exist preferentially in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4468dcf2e6f628304b40285ad40333a
https://doi.org/10.1002/mrc.1270090613
https://doi.org/10.1002/mrc.1270090613
Autor:
Desmond G. Hellier, Andrew M. Phillips
Publikováno v:
Organic Magnetic Resonance. 18:178-183
13C NMR chemical shifts for trimethylene sulphite and 35 derivatives are presented. From the magnitudes of the β shifts it has been possible to establish chemical shift additivity relationships for a series of compounds. The results are discussed in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2a63e8e73a416dde1018821f2652948
https://doi.org/10.1002/mrc.1270180314
https://doi.org/10.1002/mrc.1270180314