There are other databases that use structure search, but SciFinder connect the structure search to the chemical literature.
Interested in theses or dissertations after 2004? Try the Electronic Theses and Dissertations Center. You can download them as PDF and browse them according to department if you wish. You can even search for a particular adviser.
Interested in theses or dissertations prior to 2005? Use the keyword search in the UA Libraries Catalog. You could try a chemical engineering and selecting the material type as Thesis/Dissertation (any format) opens new window