Information om | Engelska ordet CARBANIONIC

Exempel på hur man kan använda CARBANIONIC i en mening

• By Bent's rule, placement of the carbanionic lone pair electrons in an orbital with significant s character is favorable, accounting for the pyramidalized and bent geometries of alkyl and alkenyl carbanions, respectively.
• The versatility of PLP arises from its ability to covalently bind the substrate, and then to act as an electrophilic catalyst, thereby stabilizing different types of carbanionic reaction intermediates.
• Carbon-carbon bonds, for example, exist ubiquitously in organic molecules, and are usually disconnected during a retrosynthetic analysis to yield carbocationic and carbanionic synthons.
• Pyridoxal phosphate is necessary to stabilize this carbanionic intermediate; otherwise the proton's pKa would be too high.
• A likely reason for such stability is that the pyrrolic residue is more acidic (as NH-acid) as well as more nucleophilic than the respective reaction centers involved in the anticipated double bond migration; thus, the pyrrolic ring may serve to protect the double bond from the initiation of both carbocationic and carbanionic shifts.

Förberedelsen av sidan tog: 125,60 ms.