There are certain species in organic reactions that are formed during the course of the reaction and are responsible for directing the reactions in forward direction. One of such species is the enolate which is generally formed during the reaction and is highly reactive....
Why NH4+ ion is not strong ligand? Define the term chelate. Why is an enolate ion generally more reactive than a neutral enol? The hexaaquascandium(III) ion, (Sc(H_2O)_6)^3+, is colorless. Explain why this might be expected. ...
Acylation of enolates Acylations involving CH-acid compounds which can be performed with pyridine or triethylamine as catalyst are found to proceed at a much higher rate when DMAP or PPY is used. The Dakin-West reaction of N- acyl amino acids, in which a 2-oxazolin-5-one is acetylated ...
In an aldol condensation,an enolate ion reacts with a carbonyl compound in the presence of acid/base catalyst to form a β-hydroxy aldehyde or β-hydroxy ketone, followed by dehydration to give a conjugated enone. It is a useful carbon-carbon bond-forming reaction. What is meant by aldol ...
Acylation of enolates Acylations involving CH-acid compounds which can be performed with pyridine or triethylamine as catalyst are found to proceed at a much higher rate when DMAP or PPY is used. The Dakin-West reaction of N- acyl amino acids, in which a 2-oxazolin-5-one is acetylated ...
For now, the key takeaway is that the negative charge is on theoxygen, which is considerably more stable (less basic) than having a negative charge on carbon. Adding acid will protonate the enolate (which is a base, after all) and result in our final product. ...
Step-by-Step Solution1. Definition of Active Alpha Hydrogen Atom: - An active alpha hydrogen atom is a hydrogen atom that is attached to the carbon atom adjacent (alpha carbon) to a carbonyl group (C=O) in a
Carbon is found in air filters that remove harmful pollutants from the air, such as cigarette smoke or gas fumes. Activated carbon filters are used in water purifiers, air purifiers, and other types of filters. Conclusion Carbon is an essential element for life and has various uses in differen...
system of “maximally” strongly interacting particles, and the whole chemical bond is a separate particle in which there is no place for the notion of an “individual” electron, its velocity, coordinate, energy, etc., description. This is fundamentally not true. The chemical bond is a ...
The examples have stabilized enolates. Presumably then, addition by oxygen of an enolate to the phosphonium salt could give a pentavalent phosphorous and loss of the enolate with cleavage of the P-C bond would revert back to a phosphonium salt. Dealkylation would give the phosphoryl enolate. ...