10 BÜCHER, DIE MIT «APROTIC» IM ZUSAMMENHANG STEHEN
Entdecke den Gebrauch von
aprotic in der folgenden bibliographischen Auswahl. Bücher, die mit
aprotic im Zusammenhang stehen und kurze Auszüge derselben, um seinen Gebrauch in der Literatur kontextbezogen darzustellen.
Aprotic solvent A solvent that cannot serve as a hydrogen—bond donor; nowhere
in the molecule is there a hydrogen bonded to an atom of high electronegativity.
Common aprotic solvents are dichloromethane, diethyl ether, and dimethyl ...
William Brown, Brent Iverson, Eric Anslyn, 2013
2
Introduction to Sol-Gel Processing
Solvent Type Solvents are classified as protic when they can exchange a proton,
and as aprotic when they cannot do so. They can also be classified as acidic, in
the Br0nsted sense, when they are able to donate a proton or in the Lewis sense
...
3
Advanced Organic Chemistry: Reactions And Mechanisms
There are also polar solvents such as dimethylformamide (DMF) and
dimethylsulfoxide (DMSO) that are not hydrogen donors (polar aprotic solvents).
Ideally, one would like to carry out an SN2 reaction with a negatively charged
nucleophile in ...
_, 9 I' I I . . , -'I 3 \ \ TABLE 7.2 THE EFFECTS OF POLAR PROTIC SOLVENTS
AND POLAR APROTIC SOLVENTS POLAR PROTIC POLAR APROTIC Definition
Polar protic solvents contain at least one hydrogen atom connected directly to an
...
5
Organic Chemistry, Enhanced Edition
The most commonly used polar aprotic solvents (DMSO, acetone, acetonitrile,
and DMF) are very effective in solvating cations (in addition to the attraction to the
negative end of the dipole, the lone pairs on oxygen and nitrogen act as Lewis ...
William Brown, Christopher Foote, Brent Iverson, 2010
6
Electrochemistry in Nonaqueous Solutions
Actually, there are no acidic solvents without some basicity. Aprotic solvents, on
the other hand, do not have a hydrogen atom joined to electronegative atom.
Generally, the hydrogen atom(s) of an aprotic solvent is joined only to a carbon
atom.
7
Nanostructures and Nanomaterials: Synthesis, Properties, and ...
Solvent Formula Dielectric constant Type Acetone C2H6O 20.7 Aprotic Acetic
acid C2H4O2 6.2 Protic Ammonia NH2 16 .9 Protic Benzene C6H6 2.3 Aprotic
Chloroform CHC13 4.8 Aprotic Dimethylsulfoxide (CH3)2S0 45 Aprotic Dioxanne
...
Guozhong Cao, Ying Wang, 2011
8
Solvents and Solvent Effects in Organic Chemistry
The equilibrium constants, measured by 1H NMR spectroscopy, of ethyl
acetoacetate and acetylacetone [47, 48, 134] (Table 4-2) indicate a higher enol
content for these cis-enolizing 1,3-dicarbonyl compounds in apolar aprotic than
in dipolar ...
Christian Reichardt, Thomas Welton, 2011
9
Kinetics and Solvent Effects in the Synthesis of Ionic Liquids
the reactants in the polar aprotic solvents, thus the energy difference between the
activated complex (transition state energy) and the reactants energy is minimized
. 27 This is analogous to the Gibbs energy of activation difference as displayed ...
10
Hydrogen Bonding and Transfer in the Excited State
Ke-Li Han, Guang-Jiu Zhao. Figure 20.4 Variation in the fluorescence quantum
yield (A) and fluorescence lifetime (B) of C1 dye with Δf in different solvents.
Aprotic solvents are represented by open circles and protic solvents by filled
circles.
Ke-Li Han, Guang-Jiu Zhao, 2011
10 NACHRICHTEN, IN DENEN DER BEGRIFF «APROTIC» VORKOMMT
Erfahre, worüber man in den einheimischen und internationalen Medien spricht und wie der Begriff
aprotic im Kontext der folgenden Nachrichten gebraucht wird.
How to Green Your Bench
The class of compounds known as polar aprotic solvents, which include DMSO (yellow) and DMF (red), is particularly frustrating for green ... «Laboratory Equipment, Jun 15»
Chemically converted graphene: scalable chemistries to enable …
... Spontaneous exfoliation of graphite oxide in polar aprotic solvents as the route to produce graphene oxide—organic solvents liquid crystals. «Nature.com, Jun 15»
Catalyst that converts carbon dioxide to carbon monoxide in water
Additionally, Tafel plots that compare their catalyst with other catalysts in aprotic solvents showed that their modified porphyrin is the best ... «Phys.Org, Jun 15»
Taking stock of the authorisation process
The project concerned the aprotic solvent dichloroethane, which is a non-threshold category 1B carcinogen, used by Bayer as a process solvent in the ... «Chemical Watch, Mär 15»
A Fluorination Review
In aprotic solvents, Lewis basic F- anion reduces Lewis acidic Ag(I) to Ag(0), forming metallic silver mirrors on the inner surfaces of reaction ... «Corante, Feb 15»
Meeting Review: The Chromatographic Society Spring Symposium …
He also discussed at length how the bulk solvent (protic versus aprotic solvents i.e. methanol and acetonitrile) impacted upon retention in a ... «Chromatography Today, Nov 14»
What Was It Like to Consult for Breaking Bad?
Then Walt proceeds to ask him, “Now is catalytic hydrogenation, I forget, is that protic or aprotic? If our reaction isn't stereospecific, how can our ... «Science News, Mai 14»
My Experiences and Goals as a Science Advisor for
... highest level chemistry terminology. For example, Walt says, "Please tell me: Catalytic hydrogenation: Is it protic or aprotic? Because I forget. «Huffington Post, Apr 14»
Acids and bases: solvent effects on acid–base strength
... (for example, the difficulty of aprotic solvents solvating anions and the effects on acid strength) would help lighten the presentation in places. «Chemistry World, Okt 13»
Chemical synthesis: A simple technique for highly functionalized …
lactol and nitrate ester—using different solvents, and found that a high polarity aprotic (hydrogen-free) solvent gave the best yield, with ? «Phys.Org, Sep 13»
