– A database of chemicals maintained by EH&S. If you do not have an account to login, go here for instructions on how to request one.
– Literature searching resource maintained by Thomson Reuters.
– Literature searching resource maintained by ACS.
– A quiz-style database of a large number of various total syntheses.
– Another well compiled database of total syntheses, organized by PI.
– Two tables of pKa values for various functional groups.
– Compilations of chemical shifts of various common chemical impurities.
– A website with a number of great resources for practical organic chemistry.