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Since a meso isomer has a superposable mirror image, a compound with a total of n chiral centers cannot attain the theoretical maximum of 2 n stereoisomers if one of the stereoisomers is meso. [4] A meso isomer need not have a mirror plane. It may have an inversion or a rotoreflexion symmetry such as S 4. For example, there are two meso isomers ...
These include meso compounds, cis–trans isomers, E-Z isomers, and non-enantiomeric optical isomers. Diastereomers seldom have the same physical properties. In the example shown below, the meso form of tartaric acid forms a diastereomeric pair with both levo- and dextro-tartaric acids, which form an enantiomeric pair.
There are nine stereoisomers, that differ by the position of the hydroxyl groups relative to the mean plane of the ring. All these compounds are sometimes called inositol , although this name (especially in biochemistry and related sciences) most often refers to a particular isomer, myo -inositol , which has many important physiological roles ...
myo-Inositol is a meso compound, meaning it is optically inactive because it has a plane of symmetry. [10] It is a white crystalline powder, relatively stable in the air. It is highly soluble in water, slightly soluble in glacial acetic acid , ethanol , glycol , and glycerin , but insoluble in chloroform and ether .
In chemistry, isomers are molecules or polyatomic ions with identical molecular formula – that is, the same number of atoms of each element – but distinct arrangements of atoms in space. [1] Isomerism refers to the existence or possibility of isomers. Isomers do not necessarily share similar chemical or physical properties.
Isomers themselves exist in many varieties but can generally be classified as structural isomers or stereoisomers. Structural isomers have a different ordering of bonds and/or different bond connectivity from one another, as in the case of hexane and its four other isomeric forms ( 2-methylpentane , 3-methylpentane , 2,2-dimethylbutane , and 2 ...
meso or cis: Interactive image; S,S: Interactive image; R,R: ... The compound exists as three stereoisomers, a pair of enantiomers and the meso isomer. All are ...
The meso-form is the second most abundant in nature, after 3R,3′R-zeaxanthin, which is produced by plants and algae. [1] Meso-zeaxanthin has been identified in specific tissues of marine organisms [2] and in the macula lutea, also known as the "yellow spot" of the human retina. [3] [4]