Scopus is a good starting point for finding articles on almost any topic. It contains over 47,000,000 records to scholarly publications, trade publications and conference proceedings. Scopus is an excellent database for cited reference searching. It does not contain full text articles, but users can get access to full text by using the Get It button.
Reaxys is a web-based search and retrieval system for chemical compounds, bibliographic data and chemical reactions. The database originally combined data from the Handbook of Organic Chemistry, the Gmelin Handbook of Inorganic and Organometallic Chemistry, and the Patent Chemistry Database and is now updated directly from the source literature.
Web of Science is a comprehensive research platform. Journal articles, patents, websites, conference proceedings, Open Access material—all can be accessed through one interface, using a variety of powerful search and analysis tools. Web of Science Core Collection is a painstakingly selected, actively curated database of the journals that researchers themselves have judged to be the most important and useful in their fields