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stereoisomer

stereoisomer

1 9.9
A molecule with the same atoms joined in the same order but arranged differently in space
  • noun
  • /ˌstɛr.i.oʊˈaɪ.sɪ.mɚ/
  • Specialized
translation icon : estereoisómero
  • The study of stereoisomers highlights how variations in atomic arrangement can lead to different chemical properties and biological activities.

Examples

  • Although the concept of stereoisomers and biological relevance can be difficult to demonstrate, the use of the chemotactic behavior displayed by C-Fern sperm can be an effective approach.

    Academic text (1998)
  • Propionyl coenzyme A carboxylase carboxylates propionyl COA to form a very specific stereoisomer S methyl malonyl coenzyme A.

  • Turns out nature only uses a subset of these stereoisomers and makes them relevant for biology.

  • Called "SS220," it's a stereoisomer from a mixture first synthesized by ARS scientists in 1978.

    Academic text (2005)
  • Figure 7 shows the chemical structures of the stereoisomers L- and D-malate (L-malate is the common Krebs cycle intermediate).

    Academic text (1998)
  • In organic chemistry, a stereoisomer is defined as a compound that has the same molecular formula as another but differs in the spatial arrangement of its atoms.

  • Stereochemistry is important because the two stereoisomers of the drug can have vastly different effects on the body.

Synonyms

isomer
vsstereoisomer
  • Specialized
1 8.2

A substance with the same numbers and kinds of atoms as another but arranged differently

is narrower and limited to compounds that keep the same atom connections

Surface Forms

stereoisomer singular
stereoisomers plural

Morphology

stereoisomer = isomer (semi-transparent) = stereo + isomer

The prefix 'stereo-' denotes spatial/three-dimensional arrangement and when added to 'isomer' yields the chemical sense; this is predictable to learners with scientific knowledge but not to general B1 learners.

Etymology

The word stereoisomer comes from stereo- meaning 'solid' or 'three-dimensional' and -isomer meaning 'same parts', and you can think of stereo sound as giving depth. So a stereoisomer is a chemical with the same atoms but a different three-dimensional arrangement, which explains why such molecules can behave differently.