Authors typically mention analytical data together with a chemical compound to prove that the chemical compound has been isolated. Besides that, many methods or concepts which are not directly linked to a chemical compound, are discussed in the document itself.
We would like to understand from you if chemical concepts/methods/properties are only relevant in combination with a compound and/or if they are relevant without a relationship to a compound or compound class.
Example: if you are interested to find some literature about the method NMR, do you want to retrieve all articles and patents where NMR has been used to characterize compounds (see answer 4) or do you only want to find articles, where NMR methods have been discussed and reviewed (see answers 1 to 3) as major topic of the article or review).
A chemical concept/method (e.g. spectroscopic method (like NMR) or a named reaction) should be found with a keyword search as a research topic if…