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Results tagged with cis-trans-isomerism
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Stereoisomeric olefins, cycloalkanes, etc. which differ in the positions of groups relative to a reference plane: in the cis-isomer the atoms are on the same side, in the trans-isomer they are on opposite sides. An obsolete synonym, for which the usage is strongly discouraged, is geometric isomerism.
1
vote
Accepted
E and Z configuration
You are correct; the answer in your book is wrong. I get (E) for both alkenes.
For the alkene on the upper right:
$\ce{COOH}$ has precedence over $\ce{CH2OH}$ because the first carbon atom is bond …
- 43.2k
9
votes
Accepted
What is the actual reason for geometrical isomerism?
Geometric isomerism occurs when two structures with the same connectivity are not interconvertible.
Cis-Trans isomerism is common and easy to recognize kind of geometric isomerism. The carbon-carbon …
- 43.2k
7
votes
Bends in cis Isomers
The best way to demonstrate this kink is with pictures. Usually we have some motivation to try to represent the molecule on a single line. So for oleic acid (cis-octadec-9-en-1-oic acid), we often get …
- 43.2k
0
votes
Cinnamaldehyde listed as (2E)-3-phenylprop-2-enal , but is the first 2 redundant?
The 1993 IUPAC "Blue Book" is the easiest to find online thanks to ACDLabs. In this version, numbers are only used with stereochemical descriptors if there is more than one:
(E)-phenylprop-2-enal is …
- 43.2k