American Chemical Society
An Introduction to Computer Searching of
Chemical Abstracts
STN International Version
Boolean Operators
Boolean operators are: OR, AND, NOT
 |
OR |  |
= |   |
| Alkyl | Halide | All citations with alkyl and all citations with halide. | ||
|
AND | |
= |  |
| Alkyl | Halide | Only citations with alkyl and halide in the same paper. | ||
|
NOT | |
= |  |
| Alkyl | Halide | Only citations with alkyl that don’t have halide citations also. |