Overall, the major chemical information
retrieval products Reaxys
and SciFinder have several similarities such as numbers of document
records, numbers of characterized substances (counting the PubChem
Compounds integrated in Reaxys), and, possibly, numbers of different
chemical reactions. Reaxys has well over 100 times the number of experimental
property data points, all of which may be displayed, and most may
be searched, which opens unique and important opportunities, particularly
to connect substances with their properties in a precise way. The
products have similar structure search capabilities for substances
and reactions, but they differ extensively in their approach to text
search functionality; SciFinder offers algorithmic interpretation
of natural language queries (NLQs) for text entries, while Reaxys
offers users the choice of algorithmic NLQ interpretation and of user-controlled
searches through graphic user interfaces called querylets. The NLQ
interpretations are displayable in Reaxys through the function Edit
in Query Builder, but the interpretations in SciFinder are not available.
The NLQ algorithms in Reaxys may direct users to document, substance
(including specific property information), reaction records, and (protein)
targets, and, thus, are much more extensive than those in SciFinder.
In addition to comparing content and functionality we provide updates
and explanations of search comparisons published previously, and finally
we suggest some of the issues that educators in the field of chemical
information retrieval may need to consider when preparing their coursepacks.