Questions tagged [stereochemistry]
Applicable to questions about the spatial arrangement of atoms in a molecule and how they affect its physical or chemical properties.
840
questions
-4
votes
1
answer
928
views
why does -CHO hold higher priority over -CH2OH according to CIP rule [closed]
i am unable to find proper resources to learn CIP rule at a high school level withut delving deeper into terms i cant understand and hence the basic confusion.if i am correct one has to first compare ...
- 73
-2
votes
1
answer
145
views
Are the anomeric hydroxy groups of α-maltose and β-maltose, axial or equatorial, respectively?
This Q&A is a continuation from the following Q&A;
What do we get when we joint two α- glucoses via an α1,4 bond?
More straightforwardly, the question may focus on whether the bond represented ...
- 201
3
votes
1
answer
129
views
What do we get when we joint two α- glucoses via an α1,4 bond?
What do we get when we joint two α- glucoses via an α1,4 bond?
Is it alpha maltose or beta maltose?
In other words, if we cleave amylopectin with amylase (α-amylase or β-amylase), which form of ...
- 201
1
vote
1
answer
235
views
Doubt in chirality and pseudo chirality
So a carbon atom is chiral if it has 4 different group attached to it, and it is pseudo chiral if it has 3 different groups of atoms attached to it, where the 2 similar groups have different ...
- 169
3
votes
0
answers
53
views
To what extent should a question such as: "how many enantiomers are there?" take geometric isomerism into account?
Pretty simple question here.
How many enantiomers are there for the structure $\ce{CH3CH=CHCH(CH3)CH2CH3}$?
On the one hand, there is just one chiral centre so one would suggest $2$. On the other ...
- 223
5
votes
1
answer
196
views
What is the meaning of "proto" in nomenclature?
"Proto" is generally used to describe "first", "foremost" or "earliest form of (something)" indicating something primitive that transforms into something known ...
- 26.3k
3
votes
0
answers
54
views
Optical activity of (1r,3R,5S)-1-methyl-3,5-dipropylcyclohexane (or other long alkyl groups)
Consider a cyclohexane with a methyl group at C1 position and a propyl group at C3 and C5 position and each of the first bond bonded to the cyclohexane in alkyl groups has wedge bond. I do not think ...
- 639
-1
votes
2
answers
221
views
Why is Carbon marked as 1 acting like a pseudo chiral centre?
Since there is a plane of symmetry passing through the middle of the compound, the C (chiral centres) at 2 and 3 will rotate the light through angles opposite in magnitude, say, +A and -A respectively ...
1
vote
0
answers
102
views
Converting Quartz data from one (P3221) space group to another (P3121)
For my studies, I’ve done a lot of work on coal fly ash QXRD QPA on TOPAS which has been a fun and interesting challenge. Apart from theory reviewing, a lot of my learning so far has come from a prior ...
- 500
1
vote
0
answers
718
views
Why do diastereomers have different physical and chemical properties?
While going through my book (Organic Chemistry, Paula Bruice) I came across the following line:
We have seen that enantiomers have identical physical properties. They
also have identical chemical ...
3
votes
1
answer
108
views
What does it mean when a molecule is described as "optically stable"?
In this question about "Why don't trigonal S and P compounds undergo inversion at room temperature?", phosphines, sulfoniums and sulfoxides are described as "optically stable", ...
- 186
2
votes
1
answer
187
views
Counting total number of stereoisomers of 1,2-dibromo-3,4-dimethylcyclobutane [closed]
I came across this question in one of my tests.
The answer assumes the major product (the anti markovnikov one) being formed. That is, I wish to determine number of stereoisomers of 1,2-dibromo-3,4-...
- 169
-1
votes
2
answers
222
views
Determining the number of stereoisomers of a compound [closed]
I am confused about:
Does stereoisomers include both cis-trans isomers and enantiomers (those with chiral carbons)
If a cyclic compound exhibits cis trans isomerism, is it able to exhibit optical ...
- 9
-1
votes
1
answer
102
views
Differentiating identical and enantiomers [closed]
Why is this example not considered enantiomer but identical?
And as it is identical what would be the enantiomer pair?
3
votes
2
answers
347
views
How many E/Z isomers are possible for vitamin A?
If E/Z is a type of stereoisomerism, then you should be able to use the formula $2^n,$ where $n$ is the number of stereogenic centres. How is it that there are 16 possible E/Z isomers according to the ...
- 39