Racemic mixture
A mixture containing equal amounts (50 percent each) of two enantiomers, with an enantiomeric excess of 0 percent. It is a state that chiral synthesis seeks to avoid or to resolve through separation.
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In ordinary chemical reactions, the probability of producing left-handed and right-handed molecules is almost equal, ultimately yielding a 50-50 racemic mixture.
Traditional chemical synthesis of chiral compounds usually yields a racemic mixture of equal parts R and S, because achiral reagents or achiral catalysts cannot distinguish between the two enantiofaces.
In many reactions that form chiral molecules from achiral starting materials, the two mirror-image products can be generated in equal amounts, forming a racemic mixture (50% each).
Chiral molecules rotate the plane of vibration of polarized light, with levorotatory molecules deflecting it counterclockwise and dextrorotatory molecules deflecting it clockwise, while a racemic mixture of equal amounts produces no deflection.
All Facts (4)
In ordinary chemical reactions, the probability of producing left-handed and right-handed molecules is almost equal, ultimately yielding a 50-50 racemic mixture.
50%UnverifiedTraditional chemical synthesis of chiral compounds usually yields a racemic mixture of equal parts R and S, because achiral reagents or achiral catalysts cannot distinguish between the two enantiofaces.
50%UnverifiedIn many reactions that form chiral molecules from achiral starting materials, the two mirror-image products can be generated in equal amounts, forming a racemic mixture (50% each).
50%UnverifiedChiral molecules rotate the plane of vibration of polarized light, with levorotatory molecules deflecting it counterclockwise and dextrorotatory molecules deflecting it clockwise, while a racemic mixture of equal amounts produces no deflection.
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