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In this usage, a leaving group is a less formal but more commonly used synonym of the term nucleofuge. In this context, leaving groups are generally anions or neutral species, departing from neutral or cationic substrates, respectively, though in rare cases, cations leaving from a dicationic substrate are also known. [3]
In chemistry, a nucleofuge (from nucleo- 'atomic nucleus' and fuge 'to run away/escape') is a leaving group which retains the lone pair of electrons from its previous bond with another species. For example, in the S N 2 mechanism , a nucleophile attacks an organic compound containing the nucleofuge (the bromo group ) which simultaneously breaks ...
An unpaired word is one that, according to the usual rules of the language, would appear to have a related word but does not. [1] Such words usually have a prefix or suffix that would imply that there is an antonym, with the prefix or suffix being absent or opposite.
An antonym is one of a pair of words with opposite meanings. Each word in the pair is the antithesis of the other. A word may have more than one antonym. There are three categories of antonyms identified by the nature of the relationship between the opposed meanings.
In the Figure B is a general base and X is a leaving group. Figure 9: The C–H bonding orbital is mixing with the C–X anti-bonding orbital through hyperconjugation. Figure 10: In an E 2 mechanism molecules generally prefer an anti-periplanar geometry because it aligns molecular orbitals and sets up the molecule to move electrons in a C–H ...
Like most acid anhydrides, the carbonyl carbon atom of acetic anhydride has electrophilic character, as the leaving group is carboxylate. The internal asymmetry may contribute to acetic anhydride's potent electrophilicity as the asymmetric geometry makes one side of a carbonyl carbon atom more reactive than the other, and in doing so tends to ...
Pages in category "Leaving groups" The following 15 pages are in this category, out of 15 total. This list may not reflect recent changes. ...
"Apostasy is the antonym of conversion; it is deconversion." [38] B. J. Oropeza states that apostasy is a "phenomenon that occurs when a religious follower or group of followers turn away from or otherwise repudiate the central beliefs and practices they once embraced in a respective religious community."