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WHAT DOES ENANTIOMER MEAN IN ENGLISH?
In chemistry, an enantiomer is one of two stereoisomers that are mirror images of each other that are non-superposable, much as one's left and right hands are the same except for opposite orientation. Organic compounds that contain a chiral carbon usually have two non-superposable structures. These two structures are mirror images of each other and are, thus, commonly called enantiomorphs, hence this structural property is now commonly referred to as enantiomerism. Enantiopure compounds refer to samples having, within the limits of detection, molecules of only one chirality. Enantiomers have, when present in a symmetric environment, identical chemical and physical properties except for their ability to rotate plane-polarized light by equal amounts but in opposite directions. A mixture of equal parts of an optically active isomer and its enantiomer is termed racemic and has zero net rotation of plane-polarized light because the positive rotation of each form is exactly counteracted by the negative rotation of a one. Enantiomers of each other often show different chemical reactions with other substances that are also enantiomers.
The translations of enantiomer from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «enantiomer» in English.
List of principal searches undertaken by users to access our English online dictionary and most widely used expressions with the word «enantiomer».
FREQUENCY OF USE OF THE TERM «ENANTIOMER» OVER TIME
The graph expresses the annual evolution of the frequency of use of the word «enantiomer» during the past 500 years. Its implementation is based on analysing how often the term «enantiomer» appears in digitalised printed sources in English between the year 1500 and the present day.
Examples of use in the English literature, quotes and news about enantiomer
10 ENGLISH BOOKS RELATING TO «ENANTIOMER»
Discover the use of enantiomer in the following bibliographical selection. Books relating to enantiomer and brief extracts from same to provide context of its use in English literature.
Enantiomer Separation: Fundamentals and Practical Methods
This is a modern and "green" procedure of enantiomer separation. These separation methods are described in several chapters of the book. Biological separation methods and "green" methods are covered in two chapters.
Fumio Toda, 2007
The World of Chemistry: Essentials: Essentials
One enantiomer of a chiral drug is usually more active than the other in fighting a
disease. In 1992, the U.S. Food and Drug Administration (FDA) released long-
awaited guidelines for the marketing of chiral drugs. The decision about whether
Melvin D. Joesten, John L. Hogg, Mary E. Castellion, 2006
Invitation to Organic Chemistry
Fortunately, the inactive R enantiomer is not harmful to the body. Why is one
enantiomer physiologically active while the other is not? For a molecule to have a
biological effect, it must interact with a particular receptor site in the body.
Alyn William Johnson, 1999
R enantiomer S enantiomer R enantiomer Planar carbocation (achiral) Cl Cl Cl
Cl C9Cl C1 9 CH 3 OH 9H1 H H C9OCH 3 CH 3 O9C H H 1 Cl 2 A racemic
mixture The SN1 mechanismjust described results in complete racemization.
William Brown, Christopher Foote, Brent Iverson, 2011
For an equimolar mixture of two enantiomers, the rotation induced by one
enantiomer exactly cancels that of the other, and the mixture does not rotate the
plane of polarized light. Such a 50 : 50 mixture of enantiomers is optically inactive
and is ...
Marye Anne Fox, James K. Whitesell, 2004
Essentials of Organic Chemistry: For Students of Pharmacy, ...
This informal text also places the main emphasis on understanding and predicting reactivity rather than synthetic methodology as well as utilising a mechanism based layout and featuring annotated schemes to reduce the need for textual ...
Paul M. Dewick, 2013
Cracking the MCAT with CD-ROM
enantiomer, which rotates the plane of polarized light to the left. To determine
which enantiomer is (+) and which is (-), we subject each one to polarimeter. The
polarimeter will indicate in which direction the plane of polarized light is rotated ...
James L. Flowers, Princeton Review, Theodore Silver, 2004
General Organic and Biological Chemistry
□FIGURE | 10.7 Mirror Stereoisomers and biochemistry (a) The enantiomers of
carvone and the aminoacid asparagine have very different flavors. (b) One
stereoisomer ofa drug may have a very different biological effect than its
Kenneth W. Raymond, 2009
Handbook of Reagents for Organic Synthesis, Chiral Reagents ...
C02H ,C02H Ph C02H (6) (7) r-Bu CO2H OH (8) As mentioned above, one of the
limitations of using naturally occurring resolving agents is that only one
enantiomer of the compound being resolved may be readily accessible by
Leo A. Paquette, 1999
Organic Chemistry: An Intermediate Text
If one enantiomer is present in excess over the other, then the solution will have a
net rotation corresponding in sign (+ or −) to that of the more abundant
enantiomer. The composition of the mixture is denoted by the optical purity or the
Robert V. Hoffman, 2004
10 NEWS ITEMS WHICH INCLUDE THE TERM «ENANTIOMER»
Find out what the national and international press are talking about and how the term enantiomer is used in the context of the following news items.
Extending the Range of Laboratory-Scale Purification by Utilising …
... greater quantities of material are required; this can be in the region of 200 g of pure enantiomer for those compounds requiring toxicological ... «Labmate Online, Jul 15»
Small molecule chromatography demand driving expansion, says …
As a result, synthetic approaches have become more difficult, especially when aiming to produce a single enantiomer – a chiral molecule that is ... «OutSourcing-Pharma.com, Jul 15»
Probing molecular chirality on a sub-femtosecond timescale
A simultaneous change of the sign of ellipticity and the enantiomer leaves the .... S-enantiomer (a) and R-enantiomer (b) show opposite response to the sign of ... «Nature.com, Jun 15»
New Technique To Accurately Detect The 'Handedness' Of …
The research, Enantiomer Specific Analysis of Multi-Component Mixtures by Correlated Electron Imaging-Ion Mass Spectrometry, was funded ... «Photonics Online, Jun 15»
New technique to accurately detect the 'handedness' of molecules in …
The research, Enantiomer Specific Analysis of Multi-Component Mixtures by Correlated Electron Imaging-Ion Mass Spectrometry, was funded ... «Nanowerk, Jun 15»
Teva's Generic Focalin XR Available in New Strength
It is the more pharmacologically active d-enantiomer of racemic methylphenidate, is thought to block the reuptake of norepinephrine and ... «Monthly Prescribing Reference, Jun 15»
As Philae Awakes - Where Might Life Hide In Our Solar System?
These have only one version of a chiral compound (only one enantiomer) instead of equal numbers of both. As a result, it can separate out ... «Science 2.0, Jun 15»
Long range chirality transfer observed
Chirality is crucial to biology, with most biomolecules existing as one enantiomer. Detecting chirality helps analysts determine whether a ... «Royal Society of Chemistry, Jun 15»
Evidence Mounting for Ketamine for Treatment-Resistant Depression
Esketamine, an enantiomer of ketamine, is in Phase II development as of July 2014. Zarate mentioned a study that found esketamine also ... «Psychiatry Advisor, May 15»
The SUV39H1 inhibitor chaetocin induces differentiation and shows …
Unnatural enantiomer of chaetocin shows strong apoptosis-inducing activity through caspase-8/caspase-3 activation. Bioorg Med Chem Lett ... «Nature.com, May 15»
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