When molecules have the same atoms and bond structure but differ in 3D orientation
The different types of isomers. Stereochemistry focuses on stereoisomers, red boxes in the picture.
In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space.[1][2] This contrasts with structural isomers, which share the same molecular formula, but the bond connections or their order differs. By definition, molecules that are stereoisomers of each other represent the same structural isomer.[3]
^IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "stereoisomerism". doi:10.1351/goldbook.S05983
^Columbia Encyclopedia. "Stereoisomers" in Encyclopedia.com, n.l., 2005, Link
^Clark, Jim (November 2012). "Optical isomerism". chemguide.co.uk. Retrieved 2022-08-09.
In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which molecules have the same molecular formula and sequence of bonded...
a molecule is an atom (center), axis or plane that is the focus of stereoisomerism; that is, when having at least three different groups bound to the...
constitutional) isomerism, in which bonds between the atoms differ; and stereoisomerism or (spatial isomerism), in which the bonds are the same but the relative...
chiral carbons, so they typically have more than two stereoisomers. The number of distinct stereoisomers with the same diagram is bounded by 2c, where c is...
Planar chirality, also known as 2D chirality, is the special case of chirality for two dimensions. Most fundamentally, planar chirality is a mathematical...
l-rotary, represented by (−), counter-clockwise) depending on which stereoisomer is dominant. For instance, sucrose and camphor are d-rotary whereas cholesterol...
administration. Tramadol is marketed as a racemic mixture of both R- and S-stereoisomers, because the two isomers complement each other's analgesic activities...
type of stereoisomer. Diastereomers are defined as non-mirror image, non-identical stereoisomers. Hence, they occur when two or more stereoisomers of a compound...
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just as in many other compounds. Stereoisomerism occurs with the same bonds in distinct orientations. Stereoisomerism can be further classified into: Cis–trans...
the same stereochemistry. (2S),(3S)-stereoisomer of aspartame is needed to synthesize the (2S),(3S)-stereoisomer of neotame. Neotame has similar stability...
compound or meso isomer is an optically inactive isomer in a set of stereoisomers, at least two of which are optically active. This means that despite...
computer code translator Cis-trans isomerism, in chemistry, a form of stereoisomerism Trans fat, fats containing trans-isomer fatty acids Trans, a sociological...
Atropisomers are stereoisomers arising because of hindered rotation about a single bond, where energy differences due to steric strain or other contributors...
The study of stereochemistry focuses on the relationships between stereoisomers, which by definition have the same molecular formula and sequence of...
also called (+)-d-LSD, has the absolute configuration (5R,8R). 5S stereoisomers of lysergamides do not exist in nature and are not formed during the...
chemical reaction in which a single reactant forms an unequal mixture of stereoisomers during a non-stereospecific creation of a new stereocenter or during...
name L-threonine is used for one single stereoisomer, (2S,3R)-2-amino-3-hydroxybutanoic acid. The stereoisomer (2S,3S), which is rarely present in nature...
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