- published: 23 Dec 2015
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Dextrorotation and levorotation (also spelled laevorotation) refer, respectively, to the properties of rotating plane polarized light clockwise (for dextrorotation) or counterclockwise (for levorotation), seen by an observer whom the light is approaching. A compound with dextrorotation is called dextrorotatory or dextrorotary, while a compound with levorotation is called levorotatory or levorotary.
Compounds with these properties are said to have optical activity and consist of chiral molecules. If a chiral molecule is dextrorotary, its enantiomer will be levorotary, and vice-versa. In fact, the enantiomers will rotate polarized light the same number of degrees, but in opposite directions.
It is not possible to determine whether a given chiral molecule will be levorotatory or dextrorotatory directly from its configuration, except via detailed computer modeling. In particular, both "R" and "S" stereocenters have the ability to be dextrorotatory or laevorotatory.
A dextrorotary compound is often prefixed "(+)-" or "d-". Likewise, a levorotary compound is often prefixed "(–)-" or "l-". These "d-" and "l-" prefixes should not be confused with the "D-" and "L-" prefixes based on the actual configuration of each enantiomer, with the version synthesized from naturally occurring (+)-glyceraldehyde being considered the D- form. For example, nine of the nineteen L-amino acids commonly found in proteins are dextrorotatory (at a wavelength of 589 nm), and D-fructose is also referred to as levulose because it is levorotatory. See the article: Chirality (chemistry).
Actors: Peter Kern (actor), Jean-Luc Couchard (actor), Laora Bardos-Feltoronyi (miscellaneous crew), Vincent Tavier (producer), Philippe Résimont (actor), Matyas Veress (editor), Valérie Lemaître (actress), Muriel Bersy (actress), Carmela Locantore (actress), Caroline Rottier (actress), Agathe Cornez (actress), Jacky Lambert (actor), Michelangelo Marchese (actor), Isabelle Lhoas (costume designer), Sacha Kremer (actor),
Genres: Comedy, Short,Four score
Even
Alas
You'll tell me your
Fortunes
Taken
The stand
Forsaken
But none forgotten
Borrowed, bought(en)
And so
All in, all out of
Something worth everything
All in, all out of
Everything worth nothing
But none forgotten
Borrowed, bought(en)