Back
to top
Difference between sterioisomers and structural isomers!?
Watch
Announcements
Page 1 of 1
Go to first unread
Skip to page:
According to textbook:
Sterioisomer : same structural formula but different 3d arrangement of atoms in space
structural isomer : same molecular forumla but different arrangement of atoms
To me they are identical ! obviously they are not
Please someone explain how they are different!
+rep
Sterioisomer : same structural formula but different 3d arrangement of atoms in space
structural isomer : same molecular forumla but different arrangement of atoms
To me they are identical ! obviously they are not
Please someone explain how they are different!
+rep
0
reply
Report
#2
(Original post by arvin_infinity)
According to textbook:
Sterioisomer : same structural formula but different 3d arrangement of atoms in space
structural isomer : same molecular forumla but different arrangement of atoms
To me they are identical ! obviously they are not
Please someone explain how they are different!
+rep
According to textbook:
Sterioisomer : same structural formula but different 3d arrangement of atoms in space
structural isomer : same molecular forumla but different arrangement of atoms
To me they are identical ! obviously they are not
Please someone explain how they are different!
+rep
1
reply
Report
#3
You know the difference between structural and molecular formula?
Here's two websites that explain the two things well. Let me know if you don't understand it!
Sterioisomer
http://www.chemguide.co.uk/basicorg/...geometric.html
Structural isomerism
http://www.chemguide.co.uk/basicorg/...tructural.html
Here's two websites that explain the two things well. Let me know if you don't understand it!
Sterioisomer
http://www.chemguide.co.uk/basicorg/...geometric.html
Structural isomerism
http://www.chemguide.co.uk/basicorg/...tructural.html
0
reply
Report
#4
(Original post by arvin_infinity)
According to textbook:
Sterioisomer : same structural formula but different 3d arrangement of atoms in space
structural isomer : same molecular forumla but different arrangement of atoms
To me they are identical ! obviously they are not
Please someone explain how they are different!
+rep
According to textbook:
Sterioisomer : same structural formula but different 3d arrangement of atoms in space
structural isomer : same molecular forumla but different arrangement of atoms
To me they are identical ! obviously they are not
Please someone explain how they are different!
+rep
Structural isomerism deals with the different arrangement of compounds, whereas, stereoisomerism has the same arrangement but a different spacial orientation within the arrangement. That is the difference.
There are 2 types of stereoisomerism; geometric and optical.
Edit: If you need further explanation, then please let me know.
0
reply
well answered
(Original post by whotosee)
You know the difference between structural and molecular formula?
Here's two websites that explain the two things well. Let me know if you don't understand it!
You know the difference between structural and molecular formula?
Here's two websites that explain the two things well. Let me know if you don't understand it!
(Original post by Tullia)
There are 2 types of stereoisomerism; geometric and optical.
Edit: If you need further explanation, then please let me know.
There are 2 types of stereoisomerism; geometric and optical.
Edit: If you need further explanation, then please let me know.
You have reached the limit of how many posts you can rate today!!!! OH well, will +rep you later
So lets look at this example:
They both have the same molecular formula and same arrangement of atoms and therefore same structural formula
But they have different arrangement of atoms in space
So basically structural is in 2D but sterioisomer is in 3D
0
reply
Report
#6
(Original post by arvin_infinity)
Like it
well answered
You have reached the limit of how many posts you can rate today!!!! OH well, will +rep you later
So lets look at this example:
![Image]()
They both have the same molecular formula and same arrangement of atoms and therefore same structural formula
But they have different arrangement of atoms in space
So basically structural is in 2D but sterioisomer is in 3D
Like it
well answered You have reached the limit of how many posts you can rate today!!!! OH well, will +rep you later
So lets look at this example:
They both have the same molecular formula and same arrangement of atoms and therefore same structural formula
But they have different arrangement of atoms in space
So basically structural is in 2D but sterioisomer is in 3D
0
reply
Report
#7
Structural isomers are compounds with the same molecular formula but a different structural formula.
Stereoisomers are isomers with the same structural formula but with a different arrangement of atoms in space.
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
Cis/Trans isomerism is a special case of E/Z isomerism where two substituent groups are the same.
Whenever there is E/Z isomerism there is Cis/ Trans they are basically the same thing but E/Z is a more modernly used term.
Stereoisomers are isomers with the same structural formula but with a different arrangement of atoms in space.
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
Cis/Trans isomerism is a special case of E/Z isomerism where two substituent groups are the same.
Whenever there is E/Z isomerism there is Cis/ Trans they are basically the same thing but E/Z is a more modernly used term.
0
reply
Report
#8
(Original post by arvin_infinity)
So basically structural is in 2D but sterioisomer is in 3D
So basically structural is in 2D but sterioisomer is in 3D
(Original post by Gaz94)
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
Cis/Trans isomerism is a special case of E/Z isomerism where two substituent groups are the same.
Whenever there is E/Z isomerism there is Cis/ Trans they are basically the same thing but E/Z is a more modernly used term.
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
Cis/Trans isomerism is a special case of E/Z isomerism where two substituent groups are the same.
Whenever there is E/Z isomerism there is Cis/ Trans they are basically the same thing but E/Z is a more modernly used term.
0
reply
Report
#9
(Original post by Tullia)
It isn't a difficult concept to understand, but it is highly unlikely that anything beyond the cis-trans system will be required for A-level. This is why cis-trans are what are generally taught at A-level.
It isn't a difficult concept to understand, but it is highly unlikely that anything beyond the cis-trans system will be required for A-level. This is why cis-trans are what are generally taught at A-level.
0
reply
Report
#10
(Original post by Gaz94)
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
Cis/Trans isomerism is a special case of E/Z isomerism where two substituent groups are the same.
Whenever there is E/Z isomerism there is Cis/ Trans they are basically the same thing but E/Z is a more modernly used term.
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
Cis/Trans isomerism is a special case of E/Z isomerism where two substituent groups are the same.
Whenever there is E/Z isomerism there is Cis/ Trans they are basically the same thing but E/Z is a more modernly used term.
0
reply
Report
#11
(Original post by thegodofgod)
I was told that E/Z is the terminology for IUPAC, and Cis/Trans was just old, i.e. they're interchangeable.
I was told that E/Z is the terminology for IUPAC, and Cis/Trans was just old, i.e. they're interchangeable.
Its because compounds like BromoFluoroChloroEthene can't be named with cis/trans
Instead it is named with E/Z
Such as:
Cis but-2-ene is also pronounces E but-2-ene
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
E/Z Can have different groups. Cis/trans need 2 substituent groups the same.
0
reply
Report
#12
(Original post by Gaz94)
I assume so yes. It's in all my OCR Revision guides and i think it's on the specification sheet. Cis/ Trans is old terminology yes. But E/Z is more of what they are getting towards now i think.
Such as:
Cis but-2-ene is now E but-2-ene.
I assume so yes. It's in all my OCR Revision guides and i think it's on the specification sheet. Cis/ Trans is old terminology yes. But E/Z is more of what they are getting towards now i think.
Such as:
Cis but-2-ene is now E but-2-ene.
0
reply
(Original post by thegodofgod)
Yeah, I get that - I thought you said that there's a difference in the chemistry rather than "Chemistry PCness"
Yeah, I get that - I thought you said that there's a difference in the chemistry rather than "Chemistry PCness"
So what they do is they look for priorities and then change the complicated version of isomer to a simple version like cis/trans (e.g. higher priorities on different side is E) its beyond A-level to actually identify those priorities
0
reply
Report
#16
(Original post by Gaz94)
I assume so yes. It's in all my OCR Revision guides and i think it's on the specification sheet. Cis/ Trans is old terminology yes. But E/Z is more of what they are getting towards now i think.
Its because compounds like BromoFluoroChloroEthene can't be named with cis/trans
Instead it is named with E/Z
Such as:
Cis but-2-ene is also pronounces E but-2-ene
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
E/Z Can have different groups. Cis/trans need 2 substituent groups the same.
I assume so yes. It's in all my OCR Revision guides and i think it's on the specification sheet. Cis/ Trans is old terminology yes. But E/Z is more of what they are getting towards now i think.
Its because compounds like BromoFluoroChloroEthene can't be named with cis/trans
Instead it is named with E/Z
Such as:
Cis but-2-ene is also pronounces E but-2-ene
E/Z isomerism is an example of steroisomerism in the terms of restricted rotation about a double bond. With the requirement for two different groups to be attached to each Carbon of the C=C group.
E/Z Can have different groups. Cis/trans need 2 substituent groups the same.
However, in my specification, it is only required to have an appreciation of the E/Z system but not required to be able to apply anything beyond the cis-trans system as molecules of such complexity won't come up in the exam.
0
reply
Report
#17
(Original post by arvin_infinity)
Yeh not interchangeable I guess..Basically E/z introduced cuz they couldnt name complicated isomers when all group attached to carbons are different!
So what they do is they look for priorities and then change the complicated version of isomer to a simple version like cis/trans (e.g. higher priorities on different side is E) its beyond A-level to actually identify those priorities
Yeh not interchangeable I guess..Basically E/z introduced cuz they couldnt name complicated isomers when all group attached to carbons are different!
So what they do is they look for priorities and then change the complicated version of isomer to a simple version like cis/trans (e.g. higher priorities on different side is E) its beyond A-level to actually identify those priorities
3.2.9: Students should:
- know that the alkenes can exhibit E-Z stereoisomerism
- be able to draw the structures of E and Z isomers
- understand that E-Z isomers exist due to restricted rotation about the C=C bond
3.4.4: Students should:
- know and understand the meaning of the term structural isomerism
- know that E-Z isomerism and optical isomerism are forms of stereoisomerism
0
reply
(Original post by charco)
Not beyond A level. It's in the AQA spec...
3.2.9: Students should:
3.4.4: Students should:
Not beyond A level. It's in the AQA spec...
3.2.9: Students should:
- know that the alkenes can exhibit E-Z stereoisomerism
- be able to draw the structures of E and Z isomers
- understand that E-Z isomers exist due to restricted rotation about the C=C bond
3.4.4: Students should:
- know and understand the meaning of the term structural isomerism
- know that E-Z isomerism and optical isomerism are forms of stereoisomerism
Dont get me wrong here, e/z is in the OCR spec but identifying them NOT in the syllabus
0
reply
Report
#19
its like if you have C2H2Cl2 you could have CHCl-CHCl or CCl2-CH2 they would be structural isomers
or if you had two molecules both as CHCl-CHCl one could have both Cl on the same side ie: Cl Cl Cl H
C=C OR C=C
H H H Cl
as a result of the double bond the molecules cannot rotate (like Alkanes) so despite having the same structural formula they have a different arrangement of atoms in space therefore it is a stereoisomer
or if you had two molecules both as CHCl-CHCl one could have both Cl on the same side ie: Cl Cl Cl H
C=C OR C=C
H H H Cl
as a result of the double bond the molecules cannot rotate (like Alkanes) so despite having the same structural formula they have a different arrangement of atoms in space therefore it is a stereoisomer
0
reply
Report
#20
(Original post by ++ben*19++)
its like if you have C2H2Cl2 you could have CHCl-CHCl or CCl2-CH2 they would be structural isomers
or if you had two molecules both as CHCl-CHCl one could have both Cl on the same side ie: Cl Cl Cl H
C=C OR C=C
H H H Cl
as a result of the double bond the molecules cannot rotate (like Alkanes) so despite having the same structural formula they have a different arrangement of atoms in space therefore it is a stereoisomer
its like if you have C2H2Cl2 you could have CHCl-CHCl or CCl2-CH2 they would be structural isomers
or if you had two molecules both as CHCl-CHCl one could have both Cl on the same side ie: Cl Cl Cl H
C=C OR C=C
H H H Cl
as a result of the double bond the molecules cannot rotate (like Alkanes) so despite having the same structural formula they have a different arrangement of atoms in space therefore it is a stereoisomer
1
reply
X
Page 1 of 1
Go to first unread
Skip to page:
Quick Reply
