enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Stereoisomerism - Wikipedia

    en.wikipedia.org/wiki/Stereoisomerism

    Two kinds of stereoisomers. 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.

  3. Stereocenter - Wikipedia

    en.wikipedia.org/wiki/Stereocenter

    Two enantiomers of a generic amino acid at the stereocenter. In stereochemistry, a stereocenter of 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 stereocenter, interchanging any two different groups creates a new stereoisomer.

  4. Le Bel–Van 't Hoff rule - Wikipedia

    en.wikipedia.org/wiki/Le_Bel–Van_'t_Hoff_rule

    In organic chemistry, the Le Bel–Van 't Hoff rule states that the number of stereoisomers of an organic compound containing no internal planes of symmetry is 2 n, where n represents the number of asymmetric carbon atoms.

  5. Absolute configuration - Wikipedia

    en.wikipedia.org/wiki/Absolute_configuration

    Absolute configuration showing the determination of the R and S descriptors. In chemistry, absolute configuration refers to the spatial arrangement of atoms within a molecular entity (or group) that is chiral, and its resultant stereochemical description. [1]

  6. Isomer - Wikipedia

    en.wikipedia.org/wiki/Isomer

    The English word "isomer" (/ ˈ aɪ s əm ər /) is a back-formation from "isomeric", [2] which was borrowed through German isomerisch [3] from Swedish isomerisk; which in turn was coined from Greek ἰσόμερoς isómeros, with roots isos = "equal", méros = "part". [4] Two broad types of isomers

  7. (E)-Stilbene - Wikipedia

    en.wikipedia.org/wiki/(E)-Stilbene

    (E)-Stilbene, commonly known as trans-stilbene, is an organic compound represented by the condensed structural formula C 6 H 5 CH=CHC 6 H 5.Classified as a diarylethene, it features a central ethylene moiety with one phenyl group substituent on each end of the carbon–carbon double bond.

  8. Electronic effect - Wikipedia

    en.wikipedia.org/wiki/Electronic_effect

    In organic chemistry, the term stereoelectronic effect is also used to emphasize the relation between the electronic structure and the geometry (stereochemistry) of a molecule. The term polar effect is sometimes used to refer to electronic effects, but also may have the more narrow definition of effects resulting from non-conjugated substituents.

  9. Neurochemistry - Wikipedia

    en.wikipedia.org/wiki/Neurochemistry

    Neurochemistry is the study of chemicals, including neurotransmitters and other molecules such as psychopharmaceuticals and neuropeptides, that control and influence the physiology of the nervous system.