Beilstein system

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The Beilstein system is a system for assigning organic compounds to the individual volumes of the Beilstein Handbook of Organic Chemistry using structural features. It was developed in 1907 by Bernhard Prager and Paul Jacobson for the 4th edition of the work. It was therefore called the main work.

The main criterion is the assignment to one of the three groups

  • Acyclic
  • Isocyclic
  • Heterocyclic

The first four volumes contain the acyclic compounds , volumes five to sixteen the isocyclic compounds, and volumes seventeen to twenty-seven the heterocyclic compounds . The further subdivision takes place via a hierarchical system of substituents.

If there are several properties or substituents, the substance is classified in the band with the highest possible number. This has led to the fact that the division of the volumes seventeen to twenty-seven grew disproportionately.

This information inflation ultimately led to the Beilstein being discontinued in print in 1998.

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