nucleophilic substitution (SN2) is a type of reaction mechanism that is common in organic chemistry. In the SN2 reaction, a strong nucleophile forms...
21 KB (2,555 words) - 19:00, 17 December 2024
Nucleophilic substitution (redirect from Nucleophilic substitution reaction)
simultaneously (i.e. a concerted reaction). SN2 occurs when the central carbon atom is easily accessible to the nucleophile. In SN2 reactions, there are a few conditions...
12 KB (1,415 words) - 13:08, 26 August 2024
SN2, only alkene formation by E2 elimination is observed. Thus, elimination by E2 limits the scope of the Williamson ether synthesis (an SN2 reaction)...
14 KB (1,844 words) - 22:24, 27 May 2024
and secondary alkyl halides, the alternative SN2 reaction occurs. In inorganic chemistry, the SN1 reaction is often known as the dissociative substitution...
15 KB (1,970 words) - 03:54, 24 October 2024
Pericyclic reactions, the SN2 reaction, and some rearrangements - such as the Claisen rearrangement - are concerted reactions. The rate of the SN2 reaction is...
2 KB (211 words) - 13:52, 19 October 2023
nucleophilic substitution (SN2). The two reactions are named according tho their rate law, with SN1 having a first-order rate law, and SN2 having a second-order...
12 KB (1,456 words) - 13:55, 26 August 2024
which is called the Klaui ligand. The Michaelis–Arbuzov reaction is initiated with the SN2 attack of the nucleophilic phosphorus species (1 - A phosphite)...
13 KB (1,591 words) - 16:54, 5 November 2024
Finkelstein reaction, named after the German chemist Hans Finkelstein, is a type of SN2 reaction (substitution nucleophilic bimolecular reaction) that involves...
6 KB (633 words) - 00:03, 21 November 2024
steps are similar to a base-catalyzed aldol reaction. The oxygen anion in this aldol-like product then SN2 attacks on the formerly-nucleophilic halide-bearing...
7 KB (717 words) - 13:38, 27 December 2023
Nucleophilic aromatic substitution (category Reaction mechanisms)
This reaction differs from a common SN2 reaction, because it happens at a trigonal carbon atom (sp2 hybridization). The mechanism of SN2 reaction does...
11 KB (1,295 words) - 06:15, 27 December 2024
(6) and +13.36 (0.81) for reaction with the enamine 7. The range of organic reactions also include SN2 reactions: With E = −9.15 for the S-methyldibenzothiophenium...
18 KB (2,190 words) - 20:08, 25 November 2024
Walden inversion (category Reaction mechanisms)
molecule from one enantiomeric form to the other. For example, in an SN2 reaction, Walden inversion occurs at a tetrahedral carbon atom. It can be visualized...
4 KB (404 words) - 14:03, 23 October 2024
Williamson ether synthesis (category Coupling reactions)
1850. Typically it involves the reaction of an alkoxide ion with a primary alkyl halide via an SN2 reaction. This reaction is important in the history of...
11 KB (1,339 words) - 23:53, 31 August 2024
+ RX → R−R + MX The process resembles an SN2 reaction, but the mechanism is probably complex. The reaction is intolerant of many functional groups which...
5 KB (527 words) - 22:22, 6 June 2024
mechanisms, SN1 and SN2. In their names, S stands for substitution, N for nucleophilic, and the number represents the kinetic order of the reaction, unimolecular...
66 KB (8,043 words) - 01:08, 14 October 2024
by David Yarrow Curtin and Louis Plack Hammett. It states that, for a reaction that has a pair of reactive intermediates or reactants that interconvert...
29 KB (3,757 words) - 04:10, 15 November 2024
Hammond's postulate (section SN2 reactions)
substitution (SN2) reactions are concerted reactions where both the nucleophile and substrate are involved in the rate limiting step. Since this reaction is concerted...
20 KB (2,565 words) - 03:51, 9 July 2024
Allylic rearrangement (category Reaction mechanisms)
monomolecular mechanisms (respectively the SN2' and SN1'/SNi' substitutions). Allylic shifts become the dominant reaction pathway when there is substantial resistance...
6 KB (643 words) - 23:25, 10 March 2024
Solvent effects (category Reaction mechanisms)
for SN2 reactions is quite different, as the lack of solvation on the nucleophile increases the rate of an SN2 reaction. In either case (SN1 or SN2), the...
17 KB (1,904 words) - 19:14, 18 October 2024
SNi (redirect from SNi reaction)
two successive SN2 reactions take place and the stereochemistry is again retention. With standard SN1 reaction conditions the reaction outcome is retention...
5 KB (514 words) - 15:18, 27 December 2024
an SN2 reaction and displaces the leaving group by backside attack. Alkylation reactions are subject to the same constraints that affect all SN2 reactions...
7 KB (982 words) - 20:11, 11 November 2024
with iodine, then subsequent cyclization to a tetrahydrofuran by an SN2 reaction. The second example results in a chain elongation product with the oxime...
18 KB (2,125 words) - 22:28, 27 September 2024
The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration...
26 KB (3,716 words) - 19:46, 19 September 2024
In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical reaction occurs. A chemical mechanism...
13 KB (1,686 words) - 06:29, 9 August 2024
this reaction coordinate. It is often marked with the double dagger (‡) symbol. As an example, the transition state shown below occurs during the SN2 reaction...
8 KB (992 words) - 14:49, 17 November 2024
group). For SN2 reactions, alkyl alcohols can also be converted to alkyl tosylates, often through addition of tosyl chloride. In this reaction, the lone...
8 KB (876 words) - 04:29, 2 December 2024
George S. Hammond (section SN2 reactions)
"Depiction of SN2 Reaction" figure, the nucleophile forms a new bond to the carbon, while the halide (L) bond is broken. An E1 reaction consists of a...
31 KB (3,788 words) - 16:43, 20 December 2024
Dimethylformamide (section Reactions)
solvent with a high boiling point. It facilitates reactions that follow polar mechanisms, such as SN2 reactions. As for most amides, the spectroscopic evidence...
20 KB (1,980 words) - 12:06, 15 December 2024
Woodward cis-hydroxylation (redirect from Woodward reaction)
acetate, thus forming an iodinium ion (3). The iodinium ion is opened via SN2 reaction by acetic acid (or silver acetate) to give the first intermediate, the...
2 KB (202 words) - 22:30, 27 September 2024