0
In organic chemistry, the anomeric effect or Edward-Lemieux effect is a stereoelectronic effect that describes the tendency of heteroatomic substituents adjacent to a heteroatom within a cyclohexane ring to prefer the axial orientation instead of the less hindered equatorial orientation that would be expected from steric considerations.
This effect was originally observed in pyranose rings by J. T. Edward in 1955; at that time, N.-J. Chii and R. U. Lemieux began to study the anomerization equilibria of the fully acetylated derivatives of several aldohexopyranoses. The term "anomeric effect" was introduced in 1958.
The anomeric effect received its name from the term used to designate the C-1 carbon of a pyranose, the anomeric carbon. Isomers that differ only in the configuration at the anomeric carbon are called anomers.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is the term that refer to the clarity of an image?
Resolution
What term did grantism refer to?
Political corruption during Grant's term as President >>>>>>APex)<<<<<<
What is a reducing group?
The reducing end of a carbohydrate is found at the anomeric carbon. For glucose, this would be Carbon #1 (C-1).
What term would refer to Na plus?
sodium
What term refer to way a composition is constructed?
"form"
Compare alpha Glycosidic bond and beta Glycosidic bond?
A "glycosyl bond" is a generic term and refers to the linkage between the anomeric carbon of a glycosyl moiety and an atom of the aglycon part. A letter in italic placed before the term glycosyl informs about the type of atom linked to the anomeric carbon. For example, in a "N-glycosyl bond" the anomeric carbon of the sugar is linked to a nitrogen atom of the aglycon (for example, the sugar is linked to an amino group of a protein).The term "glycosidic bond" refers exclusively to the linkage between the anomeric carbon of a glycosyl moiety and an oxygen atom of a hydroxyl compound (an alcohol, another sugar, or the hydroxyl group of serine amino acid). For this reason, to write "O-glycosidic bond" is redundant since the term glycosidic is already indicating that the linkage is with an oxygen atom. Nevertheless, IUPAC accepts the term glycosidic to refer the linkage with sulphur as well. But in this case it is necessary to add the prefix thio- or the letter S (i.e., thio-glycosidic bond or S-glycosidic bond).
What does the term 'leakage effect' refer to?
The term leakage effect has to do with tourism and the loss of revenue to other countries. The way a country makes up for leakage is to have hotels in foreign countries.
Explain how to standardize a value in statistics?
The term effect size can refer to the value of a statistic calculated from a sample of data.
To what does the term coed refer?
to what does the term coed refer
What is meant by alpha and beta carbohydrates?
The term Alpha and Beta carbohydrates refer to the configuration of the hydroxyl group on the anomeric carbon, or the number 1 carbon on aldoses, or the number 2 carbon in ketoses. If you are drawing the pyranose or furanose structures of these compounds, alpha refers to the hydroxyl group pointing down and beta refers to the hydroxyl being up.
What is an anomeric carbon?
In cyclic form of monosaccharide two forms are possible depending upon the position of -OH group,if it is present below the plane it is known as alpha position and if it is above the plane ,it is known as beta position. The two diastereomers are called anomers.the hemiacetal or hemiketal carbon is called as anomeric carbon.for examplein glucose, C-1 carbon is known as anomeric carbon.
What is the functional group on the anomeric carbon of glucose when it is in the open chain form?
Carbonyl group
What does the term extraterrestrial refer to?
The term extraterrestrial can be adjective or noun. In adjective case, the term extraterrestrial refer occurring or existing beyond the earth's atmosphere. In noun case, the term extraterrestrial refer being from the beyond the earth's atmosphere.
What does the term x86 refer to?
The term refers to hybrid processors
What term does one use to refer to a dead US president?
I can not think of any special term . Sometimes the term "dead presidents' is used to refer to money.
What does the term implantation symptoms refer to?
The term implantation symptoms refer to a sign in which a woman can determine whether or not she is pregnant. This term refers to the egg implanting itself.
What does the term estate refer to?
The press
