TIP: To specify element counts/ranges you have to type in a query with the correct syntax - the interface doesn't have an easy element count feature. Select Query Builder, then the MF menu option, then click on the periodic table button to pull up a tabular tool where you can select elements and groups to include. The Molecular Formula search is especially useful for finding hard-to-draw inorganic and organometallic/coordination compounds, and for building queries with variable element counts, shortcuts (Me, Et, Ph), and periodic groups. You can also generate a structure from a name, which you can then edit for further searching. CAS Registry Numbers and exact structures are better starting points. Some names are shown only in German, and some substance records lack names altogether. Reaxys indexes various synonyms for compounds, but don't rely solely on name string searching. Yes, but this is the least reliable kind of search. CAS assigns RNs to structures more narrowly than Reaxys.
MODERN PHYSICAL ORGANIC CHEMISTRY BIBLIOGRAPHIC FILE REGISTRATION
A single substance record in Reaxys may contain several CAS RNs because the two systems use different registration rules. CAS RNs should not be confused with Reaxys registry numbers, which are accession numbers within this database alone. Many substance records added since 1994, as well as mostĀ older Gmelin inorganic substance records, do not. Beilstein substance records created prior to 1994 usually contain RNs as chemical identifiers. Yes, but not all substance records contain CAS RNs. Consider visiting and viewing various tutorials and help materials at the Reaxys support site, or send a direct feedback comment from the Reaxys interface. One could write a whole book on the MarvinJS editor tool. How can I learn about using the Structure Editor?
![modern physical organic chemistry bibliographic file modern physical organic chemistry bibliographic file](https://images-na.ssl-images-amazon.com/images/I/91-pWbeaFZL.jpg)
For more precise searching of the core database of substances and reactions, use the Query Builder feature.
![modern physical organic chemistry bibliographic file modern physical organic chemistry bibliographic file](https://cdn11.bigcommerce.com/s-wpgom64n7v/images/stencil/500x659/products/7528/29572/MXP1__32100.1577885255.jpg)
When you use it for non-chemical concept searches it'll drop you into the Literature search, or into external substance files like PubChem.
![modern physical organic chemistry bibliographic file modern physical organic chemistry bibliographic file](https://i.pinimg.com/originals/9d/36/36/9d3636b8fff595cb9923a2faa72c80c8.jpg)
But it is still being developed and doesn't always get it right. It works fine for some very straightforward searches, such as "preparation of 1" where the algorithm can make a relational match between a concept and an unambiguous substance identifier. This feature parses your terms and attempts to find the most relevant hits across the substances, reactions, and literature segments of the Reaxys database.