Illustrated Glossary of Organic Chemistry
R
:
(1) Designation of the
absolute configuration
of a
stereocenter
at which the
Cahn-Ingold-Prelog priorities
of the attached
groups
decrease in a clockwise manner when viewed along the
bond
between the
stereocenter
and the
lowest priority
group
, with the
lowest priority
group
pointing away from the viewer. From Latin
rectus
, to the right.
Cahn-Ingold-Prelog priorities
:
HO
>
CH
3
CH
2
>
CH
3
> H, so this is (
R
)-
2-butanol
.
(2) The gas constant. In SI units, R = 8.3144621
J
K
−1
mol
−1
.
Related terms:
S
,
relative configuration
,
enantiomer
,
diastereomer
,
wedge
Wikipedia entries:
Absolute configuration
|
Gas constant
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