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Despite of containing two stereocenters (chiral centers) meso-tartaric acid is not chiral, because it is not stereospecific in the center of the molecule as a whole.
A meso compound is superposable on its mirror image, and it does not produce a "(+)" or "(-)" reading when analyzed with a polarimeter.
For example, of the 3 possible isomers of tartaric acid (depicted in 'Related links'), there is one mesocompound (the 2R,3S and 2S,3R isomers are equivalent) and two other optically active stereo-isomeric forms:
dextrotartaric acid (L-(R,R)-(+)-tartaric acid) and
levotartaric acid (D-(S,S)-(-)-tartaric acid).
Only in the meso compound an internal plane of symmetry exists, bisecting the molecule which is not present in the non-meso compounds. That is, on rotating the meso compound by 180° on a plane perpendicular to the screen, the same stereochemistry is obtained.
What else can I help you with?
Write the name of optically inactive amino acid?
Glycine, or aminoethanoic acid is the only amino acid that is not optically active as it does not contain a chiral carbon. C2H5NO2
What is difference between a racemic mixture and a meso compound?
Both are optically inactive, but for different reasons. A racemic mixture contains chiral molecules that, individually, are optically active. But the mixture contains optically active enantiomers, which essentially cancel out each other's optical activity (one enantiomer rotates light one way, the other rotates it back). A meso compound, however, is optically inactive on its own. It can have chiral centers within its structure, but due to symmetry it will still be optically inactive.
Are diastereomers optically active?
Diastereomers have different physical and chemical properties, and therefore can have different optical activities. Some diastereomers may be optically active, while others may not be. It depends on their specific molecular structures and whether they contain chiral centers.
The reaction of cis-2-butene with basic permanganate gives a product which is optically inactive even though it possess to chiral centresWhy?
The product is optically inactive because the reaction results in a meso compound, which has an internal plane of symmetry that makes it superimposable on its mirror image. This cancels out any optical activity in the molecule, even though it has two chiral centers.
What a zero specific rotation represent?
A zero specific rotation represents a molecule that is optically inactive, meaning it does not rotate plane-polarized light. This could be due to the molecule having an internal plane of symmetry that cancels out any rotational effects on the light passing through it.
An optically inactive amino acid is?
Glycine is an example of an optically inactive amino acid because it does not have a chiral center and therefore does not exhibit optical activity.
Write the name of optically inactive amino acid?
Glycine, or aminoethanoic acid is the only amino acid that is not optically active as it does not contain a chiral carbon. C2H5NO2
What is the chemical formula of mesotartaric acid?
C4H6O6
What is asymmetrical symmetry?
The synthesis of an optically active compound from an optically inactive compound with or without using an optically active reagent.
What is A mixture of equal amounts of two enantiomers?
its called a racemic mixture and is optically inactive
What is the difference between optical isomer and optically active isomer?
Optical isomers are those which have one or more asymmetric carbon atoms their optical activity means a tendency to rotate the plane of plane polarized light but some of such molecules have an internal symmetry as meso form of Tartaric acid , this is the optical isomer of Tartaric acid but is optically inactive.
How do you distiguish for the optically active and in active?
First of all we should know what optically active molecules are "Those molecules which possess asymmetric(chiral) carbon atoms have the ability to rotate the plane polarized light(light of one wavelength having its electrical character vibrating in one direction only) to the left or to the right are known as Optically active molecules" while those molecules not following the former scenario are known as Optically Inactive molecules. All in all molecules having asymmetric carbon atoms are known as optically active molecules for example glucose(rotate plane polarized light to the left) & fructose(rotate plane polarized light to the right) are optically active molecules. While molecules lacking asymmetric carbon atoms are optically inactive molecules for example water is optically inactive. And that's how we can distinguish between these two molecular classifications.
What is difference between a racemic mixture and a meso compound?
Both are optically inactive, but for different reasons. A racemic mixture contains chiral molecules that, individually, are optically active. But the mixture contains optically active enantiomers, which essentially cancel out each other's optical activity (one enantiomer rotates light one way, the other rotates it back). A meso compound, however, is optically inactive on its own. It can have chiral centers within its structure, but due to symmetry it will still be optically inactive.
Are diastereomers optically active?
Diastereomers have different physical and chemical properties, and therefore can have different optical activities. Some diastereomers may be optically active, while others may not be. It depends on their specific molecular structures and whether they contain chiral centers.
Racemic mixtures and meso compounds?
A racemic mixture contains equal amounts of two enantiomers, resulting in no overall optical activity. In contrast, a meso compound is a molecule with chiral centers but possesses an internal plane of symmetry, making it optically inactive despite having stereogenic centers.
The reaction of cis-2-butene with basic permanganate gives a product which is optically inactive even though it possess to chiral centresWhy?
The product is optically inactive because the reaction results in a meso compound, which has an internal plane of symmetry that makes it superimposable on its mirror image. This cancels out any optical activity in the molecule, even though it has two chiral centers.
What do you get when you react Propanal and hydrogen cyanide. Also why is it optically inactive and what name is given to such an inactive product?
I can't remember what you get but it's optically inactive because it's a racemic mixture. Which means that there is a 50:50 ratio of the (+) optical isomer and the (-) optical isomer. It's inactive because the (+) rotates plain polarised light clockwise and the (-) isomer rotates plain polarised light anticlockwise. So they cancel each other out because it's a racemic mix and therefore shows no optical activity.
