For a benzene shown in a skeletal structure, what does a substituent to the center of the ring mean?
$begingroup$
I have seen diagrams with both the substituents attached to the benzene ring by the edges and other occasions directly to the delocalized ring. What does signify?
organic-chemistry aromatic-compounds notation
edited 5 mins ago
Karsten Theis
5,402745
asked 2 hours ago
madeye moodymadeye moody
324
$endgroup$
add a comment |
$begingroup$
I have seen diagrams with both the substituents attached to the benzene ring by the edges and other occasions directly to the delocalized ring. What does signify?
organic-chemistry aromatic-compounds notation
edited 5 mins ago
Karsten Theis
5,402745
asked 2 hours ago
madeye moodymadeye moody
324
$endgroup$
4
$begingroup$
It means "must be someplace there, dunno where exactly". Also, methanol group is not a thing at all; that's methoxy group.
$endgroup$
– Ivan Neretin
1 hour ago
3
$begingroup$
Related: Structural representation of substituted benzene
$endgroup$
– Loong♦
1 hour ago
add a comment |
$begingroup$
I have seen diagrams with both the substituents attached to the benzene ring by the edges and other occasions directly to the delocalized ring. What does signify?
organic-chemistry aromatic-compounds notation
edited 5 mins ago
Karsten Theis
5,402745
asked 2 hours ago
madeye moodymadeye moody
324
$endgroup$
I have seen diagrams with both the substituents attached to the benzene ring by the edges and other occasions directly to the delocalized ring. What does signify?
organic-chemistry aromatic-compounds notation
organic-chemistry aromatic-compounds notation
edited 5 mins ago
Karsten Theis
5,402745
asked 2 hours ago
madeye moodymadeye moody
324
edited 5 mins ago
Karsten Theis
5,402745
asked 2 hours ago
madeye moodymadeye moody
324
edited 5 mins ago
Karsten Theis
5,402745
edited 5 mins ago
Karsten Theis
5,402745
edited 5 mins ago
Karsten Theis
5,402745
5,402745
asked 2 hours ago
madeye moodymadeye moody
324
asked 2 hours ago
madeye moodymadeye moody
324
asked 2 hours ago
madeye moodymadeye moody
324
324
4
$begingroup$
It means "must be someplace there, dunno where exactly". Also, methanol group is not a thing at all; that's methoxy group.
$endgroup$
– Ivan Neretin
1 hour ago
3
$begingroup$
Related: Structural representation of substituted benzene
$endgroup$
– Loong♦
1 hour ago
add a comment |
4
$begingroup$
It means "must be someplace there, dunno where exactly". Also, methanol group is not a thing at all; that's methoxy group.
$endgroup$
– Ivan Neretin
1 hour ago
3
$begingroup$
Related: Structural representation of substituted benzene
$endgroup$
– Loong♦
1 hour ago
4
4
$begingroup$
It means "must be someplace there, dunno where exactly". Also, methanol group is not a thing at all; that's methoxy group.
$endgroup$
– Ivan Neretin
1 hour ago
$begingroup$
It means "must be someplace there, dunno where exactly". Also, methanol group is not a thing at all; that's methoxy group.
$endgroup$
– Ivan Neretin
1 hour ago
3
3
$begingroup$
Related: Structural representation of substituted benzene
$endgroup$
– Loong♦
1 hour ago
$begingroup$
Related: Structural representation of substituted benzene
$endgroup$
– Loong♦
1 hour ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
Here the bond connecting the substituent with the center of the ring suggests that the substituent may be located on any of the three positions (ortho-, meta-, para-). From Graphical representation standards for chemical structure diagrams (IUPAC Recommendations 2008), section GR-9.1 Small substituents [1, p. 393] (emphasis mine):
Parent structures with a substituent that is attached at one of several ring atoms may be depicted by drawing that substituent attached to a bond that extends into the center of a ring. In printed works, it is assumed that the substituent may then be attached to any of the ring atoms as is allowed by normal bonding rules. When working in electronic formats, it may be possible to specify that the substituent
can be attached to certain of the ring atoms and not to others, depending on the capabilities of the software being used. If more than one substituent may be independently connected to various ring atoms, the bonds attached to those substituents should both extend toward the center of the ring, but should not
themselves be connected to each other.
References
- Brecher, J. Graphical Representation Standards for Chemical Structure Diagrams (IUPAC Recommendations 2008). Pure and Applied Chemistry 2009, 80 (2), 277–410. https://doi.org/10.1351/pac200880020277. (Free Access)
answered 1 hour ago
andseliskandselisk
20.2k667131
$endgroup$
1
$begingroup$
For the sake of completeness, very related: Markush Structure.
$endgroup$
– Martin - マーチン♦
1 hour ago
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
votes
active
oldest
votes
$begingroup$
Here the bond connecting the substituent with the center of the ring suggests that the substituent may be located on any of the three positions (ortho-, meta-, para-). From Graphical representation standards for chemical structure diagrams (IUPAC Recommendations 2008), section GR-9.1 Small substituents [1, p. 393] (emphasis mine):
Parent structures with a substituent that is attached at one of several ring atoms may be depicted by drawing that substituent attached to a bond that extends into the center of a ring. In printed works, it is assumed that the substituent may then be attached to any of the ring atoms as is allowed by normal bonding rules. When working in electronic formats, it may be possible to specify that the substituent
can be attached to certain of the ring atoms and not to others, depending on the capabilities of the software being used. If more than one substituent may be independently connected to various ring atoms, the bonds attached to those substituents should both extend toward the center of the ring, but should not
themselves be connected to each other.
References
- Brecher, J. Graphical Representation Standards for Chemical Structure Diagrams (IUPAC Recommendations 2008). Pure and Applied Chemistry 2009, 80 (2), 277–410. https://doi.org/10.1351/pac200880020277. (Free Access)
answered 1 hour ago
andseliskandselisk
20.2k667131
$endgroup$
1
$begingroup$
For the sake of completeness, very related: Markush Structure.
$endgroup$
– Martin - マーチン♦
1 hour ago
add a comment |
$begingroup$
Here the bond connecting the substituent with the center of the ring suggests that the substituent may be located on any of the three positions (ortho-, meta-, para-). From Graphical representation standards for chemical structure diagrams (IUPAC Recommendations 2008), section GR-9.1 Small substituents [1, p. 393] (emphasis mine):
Parent structures with a substituent that is attached at one of several ring atoms may be depicted by drawing that substituent attached to a bond that extends into the center of a ring. In printed works, it is assumed that the substituent may then be attached to any of the ring atoms as is allowed by normal bonding rules. When working in electronic formats, it may be possible to specify that the substituent
can be attached to certain of the ring atoms and not to others, depending on the capabilities of the software being used. If more than one substituent may be independently connected to various ring atoms, the bonds attached to those substituents should both extend toward the center of the ring, but should not
themselves be connected to each other.
References
- Brecher, J. Graphical Representation Standards for Chemical Structure Diagrams (IUPAC Recommendations 2008). Pure and Applied Chemistry 2009, 80 (2), 277–410. https://doi.org/10.1351/pac200880020277. (Free Access)
answered 1 hour ago
andseliskandselisk
20.2k667131
$endgroup$
1
$begingroup$
For the sake of completeness, very related: Markush Structure.
$endgroup$
– Martin - マーチン♦
1 hour ago
add a comment |
$begingroup$
Here the bond connecting the substituent with the center of the ring suggests that the substituent may be located on any of the three positions (ortho-, meta-, para-). From Graphical representation standards for chemical structure diagrams (IUPAC Recommendations 2008), section GR-9.1 Small substituents [1, p. 393] (emphasis mine):
Parent structures with a substituent that is attached at one of several ring atoms may be depicted by drawing that substituent attached to a bond that extends into the center of a ring. In printed works, it is assumed that the substituent may then be attached to any of the ring atoms as is allowed by normal bonding rules. When working in electronic formats, it may be possible to specify that the substituent
can be attached to certain of the ring atoms and not to others, depending on the capabilities of the software being used. If more than one substituent may be independently connected to various ring atoms, the bonds attached to those substituents should both extend toward the center of the ring, but should not
themselves be connected to each other.
References
- Brecher, J. Graphical Representation Standards for Chemical Structure Diagrams (IUPAC Recommendations 2008). Pure and Applied Chemistry 2009, 80 (2), 277–410. https://doi.org/10.1351/pac200880020277. (Free Access)
answered 1 hour ago
andseliskandselisk
20.2k667131
$endgroup$
Here the bond connecting the substituent with the center of the ring suggests that the substituent may be located on any of the three positions (ortho-, meta-, para-). From Graphical representation standards for chemical structure diagrams (IUPAC Recommendations 2008), section GR-9.1 Small substituents [1, p. 393] (emphasis mine):
Parent structures with a substituent that is attached at one of several ring atoms may be depicted by drawing that substituent attached to a bond that extends into the center of a ring. In printed works, it is assumed that the substituent may then be attached to any of the ring atoms as is allowed by normal bonding rules. When working in electronic formats, it may be possible to specify that the substituent
can be attached to certain of the ring atoms and not to others, depending on the capabilities of the software being used. If more than one substituent may be independently connected to various ring atoms, the bonds attached to those substituents should both extend toward the center of the ring, but should not
themselves be connected to each other.
References
- Brecher, J. Graphical Representation Standards for Chemical Structure Diagrams (IUPAC Recommendations 2008). Pure and Applied Chemistry 2009, 80 (2), 277–410. https://doi.org/10.1351/pac200880020277. (Free Access)
answered 1 hour ago
andseliskandselisk
20.2k667131
answered 1 hour ago
andseliskandselisk
20.2k667131
answered 1 hour ago
andseliskandselisk
20.2k667131
answered 1 hour ago
andseliskandselisk
20.2k667131
20.2k667131
1
$begingroup$
For the sake of completeness, very related: Markush Structure.
$endgroup$
– Martin - マーチン♦
1 hour ago
add a comment |
1
$begingroup$
For the sake of completeness, very related: Markush Structure.
$endgroup$
– Martin - マーチン♦
1 hour ago
1
1
$begingroup$
For the sake of completeness, very related: Markush Structure.
$endgroup$
– Martin - マーチン♦
1 hour ago
$begingroup$
For the sake of completeness, very related: Markush Structure.
$endgroup$
– Martin - マーチン♦
1 hour ago
add a comment |
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4
$begingroup$
It means "must be someplace there, dunno where exactly". Also, methanol group is not a thing at all; that's methoxy group.
$endgroup$
– Ivan Neretin
1 hour ago
3
$begingroup$
Related: Structural representation of substituted benzene
$endgroup$
– Loong♦
1 hour ago