In this page we report the known problems related to the use of the page
Name Your Molecule (IUPAC)
and to the software OPSIN (University of Cambridge) on which the page is based.
OPSIN is a parser, i.e a program which reads the IUPAC names that the user submit to the page, and generates the molecular structure.
This programm is not yet able to have a whole look on the nomenclature process along the IUPAC rules. It can read a name if it is correect, but cannot rule out if, as an example, the user assigned the lowest number as possible to the first susbtituent. The difference between the two names a user can assign such as: 2-chlorohexane e 5-chlorohexane cannot be identified. The IUPAC rule . The IUPAC rule requires that the numbering of the chain starts from the end closest to the first substituent and therefore always has to give the lowest possible number to the substituents.
Case of 2-chlorohexane.
OPSIN can manage a lot of different functional groups and its accuracy is very high. However, OPSIN is always in a development phase and test, to improve pèerformance and to extend the groups that can be recogninzed and nomenclature approaches.
A few problems were evidenced and they are reported here.
We therefore remember to consider the obtained results, very carefully. No computer system is perfect. The page we present on iOrgChem is based exclusively on Open Source Software, a valuable contribution "donated" by programmers to the Web community. We cannot guarantee that the results are always accurate. We have no responsibility for errors or inaccuracies.
The molecule name should be written in english only.