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carbanion

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carbanion
carbanion Chem. (kɑːˈbænaɪən) [f. carb- + anion.] An organic ion containing negatively charged carbon. Cf. carbonium (b).1933 Wallis & Adams in Jrnl. Amer. Chem. Soc. LV. 3838 For the sake of clearness in discussion all tricovalent carbon compounds may be divided into three classes: (1) ‘carbanions’... Oxford English Dictionary
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Carbanion
In organic chemistry, a carbanion is an anion in which carbon is negatively charged. A carbanion is one of several reactive intermediates in organic chemistry. wikipedia.org
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Adamantanone
This barrier arises because the resulting carbanion cannot exist in conjugation with the carbonyl pi-bond. References Adamantanes Ketones wikipedia.org
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carbonium
carbonium Chem. (kɑːˈbəʊnɪəm) [f. carbo- + -onium as in ammonium.] (a) Formerly, ‘the univalent radical CH3 in the capacity..of a base former analogous to ammonium’ (Webster 1909); (b) used attrib. of an organic ion containing positively charged carbon. Cf. carbanion.1902 Jrnl. Chem. Soc. LXXXII. i.... Oxford English Dictionary
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Orotidine 5'-phosphate decarboxylase
Current consensus suggests that the mechanism proceeds through a stabilized carbanion at the C6 after loss of carbon dioxide. Remarkably, the enzyme microenvironment helps stabilize the carbanion considerably. wikipedia.org
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Cyanomethyl
cyanide (N≡C) + methyl (CH3)) designates: A cyanomethyl group (N≡CCH2–), a type of nitrile group The cyanomethyl radical (N≡CCH2·) The cyanomethyl carbanion wikipedia.org
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Kornblum–DeLaMare rearrangement
Reaction mechanism In the reaction mechanism for this organic reaction the base abstracts the acidic α-proton of the peroxide 1 to form the carbanion 4 The reaction course in this rearrangement is different because ether cleavage with carbanion formation is unfavorable. wikipedia.org
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أنيون كربوني
الأيون الكربوني السالب أو الأنيون الكربوني (carbanion) هو أيون سالب (أنيون) يكون فيه للكربون زوج إلكترونات غير رابط ويحمل شحنة سالبة وعادة يكون محاط بأربع wikipedia.org
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Oxalyl-CoA decarboxylase
This carbon center ionizes to form a carbanion, which adds to the carbonyl group of oxalyl-CoA. This addition is followed by the decarboxylation of oxalyl-CoA, and then the oxidation and removal of formyl-CoA to regenerate the carbanion form of TPP wikipedia.org
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2,3-Wittig rearrangement
When X is a carbanion and Y an alkoxide, the rearrangement is called the [2,3]-Wittig rearrangement and the products are pent-1-en-5-ols. The carbanion is generated by direct lithiation of moderately acidic substrates, tin transmetallation, or reductive lithiation of O,S-acetals. wikipedia.org
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Ketonic decarboxylation
The initial formation of an intermediate carbanion via decarboxylation of one of the acid groups prior to the nucleophilic attack has been proposed, but is unlikely since the byproduct resulting from the carbanion's protonation by the acid has never been reported. wikipedia.org
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Corey–Winter olefin synthesis
An alternative mechanism does not involve a free carbene intermediate, but rather involves attack of the carbanion by a second molecule of trimethylphosphite The phosphorus stabilized carbanion then undergoes an elimination to give the alkene, along with an acyl phosphite, which then decarboxylates. wikipedia.org
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Bingel reaction
Reaction mechanism The reaction mechanism for this reaction is as follows: a base abstracts the acidic malonate proton generating a carbanion or enolate This in turn generates a carbanion which displaces bromine in a nucleophilic aliphatic substitution in an intramolecular ring cyclopropane ring closure wikipedia.org
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Lide
Lide can refer to: -lide, a chemistry suffix indicating an sp-hybridized carbanion ionically linked to a metal Saint Lide, a legendary bishop People wikipedia.org
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Darzens reaction
Reaction mechanism The reaction process begins when a strong base is used to form a carbanion at the halogenated position. Because of the ester, this carbanion is a resonance-stabilized enolate, which makes it relatively easy to form. wikipedia.org
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