Differences

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--- structurelevels [2012/10/15 18:05] – sanmark
+++ structurelevels [2013/02/07 09:59] (current) – spell fix sanmark
@@ Line 14: / Line 14: @@
 |Conformer                     |Mesomers                                            |Stereoisomers, tautomers, protonation states, conformers |
-Chemical structures with different stereo configurations are distinguished at all specification levels. Depending on the stereo configuration type, they represent a single isomer or a set of potential isomers and/or mixtures of isomers. (figure) Their stereo configurations are treated identical if and only if the represented isomers / set of isomers are identical. If the configuration differs, the chemical structures are treated as different database entries.
+Chemical structures with different stereo configurations are distinguished at all specification levels. Depending on the stereo configuration type, they represent a single isomer or a set of potential isomers and/or mixtures of isomers. Their stereo configurations are treated identical if and only if the represented isomers / set of isomers are identical. If the configuration differs, the chemical structures are treated as different database entries.
-//Compounds// can have more symmetries than //structures//. In //compounds// neither the number of hydrogens nor the position of some hydrogens are fixed. A //compound// can represent all realistic tautomeric and protonation states (//structures//). Therefore those asymmetry centers that are present only in one potential //structure// (tautomer and protonation state) are not treated as stereogenic at the //compound level//. Similarly, some cis-trans bonds found a //structure// might be missing from the corresponding //compound//.
+//Compounds// can have more symmetries than //structures//. In //compounds// neither the number of hydrogens nor the position of some hydrogens are fixed. A //compound// can represent all realistic tautomeric and protonation states (//structures//). Therefore those asymmetry centers that are present only in one potential //structure// (tautomer and protonation state) are not treated as stereogenic at the //compound level//. Similarly, some cis-trans bonds found in a //structure// might be missing from the corresponding //compound//.
-===Relations===
+{{ :speclevel2.png |}}
+====Relations====
 The three structure levels have the following relations: //compounds// can have (can be represented by) multiple //structures//, and //structures// with well-defined, known configurations can have multiple //conformers//. Inversely, //conformers// have exactly one //structure//, and //structures// have exactly one //compound//.