QUE SIGNIFIE SULPHONIUM ION EN ANGLAIS
définition de sulphonium ion dans le dictionnaire anglais
La définition de l'ion sulfonium dans le dictionnaire est un ion positif produit par l'addition d'un proton à l'atome de soufre d'un thiol ou d'un thio-éther.
MOTS EN ANGLAIS EN RAPPORT AVEC «SULPHONIUM ION»
sulphonium ion ·
sulphonium ·
salt ·
collins ·
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salts ·
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addition ·
proton ·
sulphur ·
atom ·
thiol ·
thio ·
ether ·
thus ·
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geometry ·
inversion ·
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scitation ·
been ·
calculated ·
using ·
variety ·
basis ·
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wiley ·
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tetramethyl ·
ammonioum ·
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version ·
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carbonium ·
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since ·
rotation ·
camphorsulphonate ·
about ·
balance ·
must ·
10 LIVRES EN ANGLAIS EN RAPPORT AVEC «SULPHONIUM ION»
Découvrez l'usage de
sulphonium ion dans la sélection bibliographique suivante. Des livres en rapport avec
sulphonium ion et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
... possess Mrj of + 68° and now since the rotation of (+)- camphorsulphonate ion
is only about + 52°, the balance of rotation i.e., + 68° - (+52°) = + 16° of the (+) -
sulphonium camphorsulphonate must be the contribution of the sulphonium ion.
2
A Dictionary of Science
O Information about IUPAC nomenclature sulphonium compounds Compounds
containing the ion R35+ (sulphonium ion), where R is any organic group.
Sulphonium compounds can be formed by reaction of organic sulphides with
halogen ...
John Daintith, Elizabeth A. Martin,
2010
3
Non-Radical Polymerisation
The lower reactivity of the free cyclic sulphonium ion in nitrobenzene compared
to that in methylene chloride is consistent with the general concepts of solvent
effects in ionic reactions (Section 6.5). Propagation requires charge dispersion, ...
R.G. Compton, C.H. Bamford, C.F.H. Tipper†,
1976
4
Organic Compounds of Sulphur, Selenium and Tellurium
... with the sulphenyl chloride.423 The overall reaction leads to MeSCH2CH(SMe
)CH2X with scrambling of the 2H, which indicates a reversible degenerate
rearrangement of the intermediate 5-methylthio-sulphonium ion. Cleavage of
both C— ...
Royal Society of Chemistry, D. R. Hogg,
1981
5
Addition and Elimination Reactions of Aliphatic Compounds
The drastic decrease in the sulphur isotope effect for the elimination from 2-
phenylethyldimethyl-sulphonium ion in aqueous alkali upon addition of
increasing amounts of dimethyl sulphoxide indicates a gradual change towards a
more ...
C.H. Bamford, R.G. Compton, C.F.H. Tipper†,
1973
6
Aliphatic Nucleophilic Substitution
S. R. Hartshorn. reactions of both N3" and SH" with 1-phenylethyl chloride are of
the type which has been shown to proceed with inversion, the amine (50) and the
sulphonium ion are known to be of like configuration. The sul- phonium ion can ...
7
Krishan's Objective Pre Engineering Chemistry
... of solvent causes a small decrease in the rate of SN2 attack by trimethyl amine
on trimethyl sulphonium ion (d) Increasing the polarity of solvent causes a large
increase in the rate of SN2 attack by 0H~ ion on trimethyl sulphonium ion □ 158.
8
Electrochemical Reactions and Mechanisms in Organic Chemistry
Basic species formed in this way can abstract a proton from sulphonium ion to
give the ylid, which is not reducible. A good example is the reduction of 9 in
dirnethylsulphoxide, which consumes only one Faraday and follows the course
shown ...
... (+)-sulphonium camphorsulphonate was the less soluble fraction, and had an
MD of + 68°. Since the rotation of the (+ )-camphorsulphonate ion is about + 52°,
this leaves + 16° as the contribution of the sulphonium ion to the total rotation.
Sulphonium ion (SO3) carries no net charge, but it acts as an electrophile for
sulphonation in benzene rings. This is because of its structure. O – S – O O – – +
+ As the positive charge is concentrated and the negative charge is scattered, it
acts ...