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stereochemistry
stereochemistry
54
Chemistry
Undergraduate 2
10/19/2008

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Term
[image]
Definition
enantiomers
Term
[image]
Definition
diasteromers
Term
[image]
Definition
diasteromers
Term
[image]
Definition
same
Term
[image]
Definition
constitutional isomers
Term
[image]
Definition
non-isomers
Term
[image]
Definition
diasteromers
Term
[image]
Definition
enantiomers
Term
[image]
Definition
same
Term
[image]
Definition
diasteromers
Term
[image]
Definition
chiral = the compound is not superimposeable on its mirror image
Term
[image]
Definition
achiral = superimposeable on its mirror image and has no stereocenters
Term
[image]
Definition
chiral = nonsuperimposeable on its mirror image
Term
[image]
Definition
chiral = nonsuperimposeable on its mirror image
Term
[image]
Definition
achiral and meso = superimposeable on its mirror image and has more than one stereocenters
Term
[image]
Definition
chiral = nonsuperimposeable on its mirror image
Term
[image]
Definition
achiral and meso = superimposeable on its mirror image and has more than one stereocenters
Term
[image]
Definition
achiral = superimposeable on its mirror image and has no stereocenters
Term
[image]
Definition
achiral = superimposeable on its mirror image and has no stereocenters
Term
[image]
Definition
chiral = nonsuperimposeable on its mirror image
Term
chiral
Definition
if it is not superposable on its mirror image.
Term
achiral
Definition
if it is superposable on its mirror image.
Term
meso
Definition
if it is achiral and contains two or more stereocenters
Term
enamtiomers
Definition
Stereoisomers that are non-superposable mirror images.
Term
diasteromers
Definition
Stereoisomers that are non-superposable, but are not mirror images.
Term
constitutional isomers
Definition
Isomers which contain atoms that differ in connectivity.
Term
non-isomers
Definition
Compounds that do not have the same molecular formula.
Term
superimposeable
Definition
A term that describes the ability to precisely overlap one object over another. Only identical objects
Term
stereoisomers
Definition
Isomers which have atoms that differ only by their orientation in space. Unlike constitutional isomers, corresponding atoms exhibit the same connectivity.
Term
isomers
Definition
Compounds that have the same molecular formula.
Term
[image]
Definition
the shell is chiral = = nonsuperimposeable on its mirror image
Term
[image]
Definition
a pencil is achiral = superimposeable on its mirror image
Term
[image]
Definition
gloves are chiral = nonsuperimposeable on its mirror image
Term
[image]
Definition
carbon with 4 substituents (tetrahedral) is chiral = nonsuperimposeabel to its mirror image
Term
[image]
Definition
carbon with 3 different substituents is achiral = superimposeable on its mirror image
Term
Levorotary
Definition
indicates the counterclockwise rotation of plane-polarized light
Term
D
Definition
The specific rotation of a compound is denoted by the symbol
Term
[image]
Definition
It has R configuration
Term
[image]
Definition
diasteromers
Term
[image]
Definition
32
Term
[image]
Definition
rotates plane-polarized light in a clockwise direction
Term
[image]
Definition
not chiral
Term
[image]
Definition
the following would have an enamtiomer
Term
[image]
Definition
is not meso
Term
[image]
Definition
The stereochemistry of the double bond makes the molecule have a chiral center
the following compound rotates plane-polarized light
Term
enantiomeric excess =
Definition
(specific rotation of the mixture/ specific rotation of the pure enantiomer in excess) 100
Term
Racemates
Definition
are equal molar mixtures of two enantiomers
Term
S/ R
Definition
-/ +
Term
R/S
Definition
If the lowest priority group is already projected back behind the plane (dotted line) or is within the plane (solid line) then trace through the other three groups beginning with the highest priority group first as above(1,2,3 trace).
If on the other hand, the lowest priority group is projected in front of the plane (solid wedge) then trace through the other three groups beginning with the highest priority group first as above(1,2,3 trace). Reverse the trace so that if the trace was clockwise indicating "R" configuration make it "S" configured. If the trace was counter clockwise indicating "S" then reverse it and make it clockwise making it "R" configured.
Term
[image]
Definition
achiral/chiral
Term
[image]
Definition
(a) S (b) S (c) R (d) S
Term
[image]
Definition
(a) Diastereomers (b) Diastereomers (c) Enantiomers (d) Identical (e) Enantiomers
Term
[image]
Definition
stereoisomers/not
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