Not necessarily , the meso form is optically inactive.
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.
It means substance is optically inactive ,it is either a Recemic mixture or a Meso form of a compound
a meso structure is a structure which has more than 1 chiral centers and is superimpossible on its miirror image.this compounds are optically inactive and can be reffered to as distereomers
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) andlevotartaric 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.
solution containing equal amounts of enantiomers.it is optically inactive.
Not necessarily , the meso form is optically inactive.
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.
It means substance is optically inactive ,it is either a Recemic mixture or a Meso form of a compound
a meso structure is a structure which has more than 1 chiral centers and is superimpossible on its miirror image.this compounds are optically inactive and can be reffered to as distereomers
The synthesis of an optically active compound from an optically inactive compound with or without using an optically active reagent.
Glycine
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) andlevotartaric 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.
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.
in this reaction meso form of tartaric acid is formed in which half of the molecule is the mirror image of other half so the optical activity is cancelled out....
its called a racemic mixture and is optically inactive
Glycine, or aminoethanoic acid is the only amino acid that is not optically active as it does not contain a chiral carbon. C2H5NO2