CĂRȚI ÎN ENGLEZĂ ÎN LEGĂTURĂ CU «ELECTROPHILE»
Descoperă întrebuințarea
electrophile în următoarea selecție bibliografică. Cărți în legătură cu
electrophile și extrase din aceasta pentru a furniza contextul de întrebuințare al acestuia în literatura Engleză.
The ions come together as an electrophile and a nucleophile: Cl Electrophile
Nucleophile Electron-rich reagents such as chloride ion are referred to as
nucleophiles because they seek centers of positive charge. The word
nucleophile derives ...
Marye Anne Fox, James K. Whitesell, 2004
2
Understanding Organic Reaction Mechanisms
In addition to being electron-deficient, an electrophile must also have a vacant
orbital. Of course, all atoms and molecules have vacant orbitals, but what we
really mean here is that an electrophile must have a vacant orbital that is not too
high ...
3
Modern Physical Organic Chemistry
H3N: H-TfflBr " H3N— f-H + :Br (Eq.10.1) Nucleophile Electrophile A nucleofuge
is a nucleophile that is departing from a molecule instead of adding, and an
electrof uge is an electrophile that is departing from a molecule instead of adding.
Eric V. Anslyn, Dennis A. Dougherty, 2006
After movement of electrons to form the intermediate carbocation, as shown in the
last equation, a new electrophile and a new nucleophile are formed. A second
step then takes place, and electron movement occurs in the same fashion: The ...
5
Advanced Organic Chemistry: Part A: Structure and Mechanisms
The soft nucleophile–soft electrophile combination is associated with a late TS,
where the strength of the newly forming bond contributes significantly to the
structure and stability of the TS. Species in Table 4.3 that exhibit high
nucleophilicity ...
Francis A. Carey, Richard J. Sundberg, 2007
6
Organic Chemistry: With Biological Applications
Water, for instance, acts as an electrophile when it donates H but acts as a
nucleophile when it donates a nonbonding pair of electrons. Similarly, a carbonyl
compound acts as an electrophile when it reacts at its positively polarized carbon
...
Halogenation (Section 22.1A) The electrophile is a halonium ion formed as an
ion pair by interaction of chlorine or bromine with a Lewis acid. The mechanism
involves an initial reaction between C12 and FeCl3 to generate a molecular ...
William Brown, Brent Iverson, Eric Anslyn, 2013
The Lewis acid is called an electrophile, which is derived from Greek words
meaning “electron loving.” An electrophile is an electron-poor species that seeks
an electron-rich site, a nucleophile. The electrophile can accept a pair of
electrons ...
9
Additions to and Substitutions at C-C Pi-Bonds
1 ]hept-2-ene the attack of the electrophile from the less hindered exo face is
favored; on the other hand bicyclo[2.2.1]hepta-2,5-diene shows a preference for
endo attack (Scheme l).4 61% 31% Scheme 1 The major focus in this chapter will
be ...
Barry M. Trost, Martin F. Semmelhack, Ian Fleming, 1991
10
Advanced Organic Chemistry: Part A: Structure and Mechanisms
There may also be a 7r-complex involving the aromatic ring and the departing
electrophile. This would be logical on the basis of the principle of overall
reversibility of the process. There is little direct evidence on this point however. '
Let us now ...
Francis A. Carey, Richard J. Sundberg, 2000
ȘTIRI NOI CARE INCLUD TERMENUL «ELECTROPHILE»
Află ce ziare naționale și internaționale au scris despre și cum este întrebuințat termenul
electrophile în contextul următoarelor știri.
18 Spices Scientifically Proven To Prevent and Treat Cancer
They observed a thyme extract to activate promoters via the electrophile responsive element, thus providing potential clues about the ... «Newswire, Mai 15»
Rubriflordilactone A
Converting the lactol to the corresponding fluoride with diethylaminosulfur trifluoride (DAST), gives a new electrophile that is (unfortunately) ... «Royal Society of Chemistry, Ian 15»
New UGA research challenges fundamental precept of organic …
"The electrophile is supposed to attach itself to the aromatic in a first stage to give an 'intermediate,' from which another group, present at the ... «Online Athens, Iul 14»
Carbon–carbon couplings go 3D
... 2-lithiofuran, to convert their boronic esters into intermediate boronate complexes that react with an appropriate electrophile to give a cation. «Chemistry World, Iun 14»
Giving Testosterone Levels a Boost (Part 3)
Systems analysis of protein modification and cellular responses induced by electrophile stress. Acc Chem Res, 2010;43:673-683. Romero FJ, Bosch-Morell F, ... «Dynamic Chiropractic, Feb 14»
Re-arming the antibiotic arsenal
'It's conceivable that this is a kind of synergistic defence mechanism – if your antibiotic contains an electrophile, then it will conjugate with ... «Chemistry World, Sep 13»
Hearts of Stone: Sexual Deviants in Antiquity
... gained everything from latex fetishism to mechanophilic arousal by automobiles to the electrophile's sexual dependence on electric currents. «Scientific American, Aug 13»
Confessions of a D Orbital
According to the textbook, “In Friedel-Crafts alkylation, the electrophile is typically a carbonium ion. It, too, is formed in an acid-base equilibrium, ... «PLoS Blogs, Mai 13»
Criminal Chlorination
For their participation in the ignominious marriage of proscribed neucleophile and electrophile they often pay a dire price: their freedom. «VICE, Sep 12»
Organic chemistry: Reactions at the end of a tether
... molecular choreography that enables them to convert a nucleophile into an electrophile, so that it can react with another nucleophilic partner. «Nature.com, Iun 12»
