All Questions
Tagged with notation stereochemistry
9
questions
2
votes
2
answers
984
views
How to draw chair-form for trans-decalin (with slight variation)?
I understand how to draw chair form for trans-decalin (figure 1) for the usual structure, but I am having difficulty if taken as shown in figure 2 wherein the hydrogens at bridge-head carbons are in ...
- 31
3
votes
0
answers
638
views
What do γ (gamma) and λ (lambda) mean in organic chemistry?
From the Wikipedia entry on Cyhalothrin:
Pyrethroids such as cyhalothrin are often preferred as an active
ingredient in agricultural insecticides because they are more
cost-effective and longer ...
- 1,795
2
votes
2
answers
18k
views
How to convert wedge–dash structure into Fischer projection? [closed]
I am very confused when a compound with more than one chiral centre is given. How to find whether the two compounds are enantiomers or diasteromers?
Please also explain how to convert more than one ...
- 244
5
votes
1
answer
2k
views
Can a double bond extend beyond the plane and if so, how would it be drawn?
Can double and triple bonds, etc., extend beyond the plane in a Lewis structure, and if so, how are they represented? I.e., how would 1 and 2 in this image be drawn if they were doubles or triples?
- 153
8
votes
1
answer
2k
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Does the Location of Line-Dash-Wedge Notations Matter?
In Line-Dash-Wedge notation, when illustrating that an atom or bond is directed towards or away from the viewer (solid triangle for coming forward, dotted lines for going back), does the location of ...
0
votes
1
answer
395
views
What do D and L stand for in the Fischer-Rosanoff convention?
In R and S configuration, the R stands for rectus and the S stands for sinister. Similarly, do the D and L descriptors in the Fischer-Rosanoff convention stand for something?
2
votes
1
answer
722
views
Depicting molecules by Natta projection
Does anyone know the meaning of these two bonds in stereochemistry? These bonds are provided by the $\mathrm{\LaTeX}$ chemfig package. The creator of the ...
- 33
3
votes
1
answer
2k
views
How to wedge d/hash notation a molecule?
This is probably trivia for many of you (I already feel the pressure by even posting this question). Yet funny enough, most of the time the materials I have come across show the wedge-d/hash notation. ...
- 1,944
8
votes
3
answers
34k
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DL vs dl notation [closed]
As the L-isomer of glucose, it is the enantiomer of the more common D-glucose.
Source: Wikipedia
As far as I know enantiomers or Optical isomers are non superimposable mirror image structures with ...
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