Algorithmic Analysis of Cahn−Ingold−Prelog Rules of Stereochemistry: Proposals for Revised Rules and a Guide for Machine Implementation. and is 100% accurate in all 300 test cases provided. The CIP algorithm in ChemDoodle is validated against the test suite provided by Hanson et. Stereochemical features in your structures will be assigned 'R', 'S', 'E', 'Z', 'M' and 'P' descriptors. to remove any ambiguities and describe a completely consistent system for CIP assignments.ĬhemDoodle implements all 6 current CIP rules as well as auxilliary desciptors and mancude ring support.

The most recent CIP rules from IUPAC were then algorithmically analyzed and standarized by Hanson et al. These rules were adopted by IUPAC for naming standards and fully described in the Blue books.

While flawed, they have seen many revisions over the decades and were clarified by the work of Paulina Mata. The CIP rules have long been the standard for describing configurations of stereochemical features in a molecule.

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