These are the best databases for finding primary literature in chemistry.
SciFinder and Scopus are not full-text databases. Neither includes article PDFs for download. They do, however, link to the library's Full Text Finder to help you find the articles.
In SciFinder, click the Other Sources link found on the search results page under each article title. In Scopus, click the LinkSource button found on the research results page under each article title.
The Full Text Finder will list options for getting the PDF of an article. The example below shows every option. Not all options will be available for every article. These are the options you want to look for: