11. This reaction type was discovered independently by Henry Gilman and Georg Wittig around 1940. 12. This reaction type is called the Bucherer Bergs reaction. 13. Detailed understanding of a reaction type helps to predict the product outcome in a reaction. 14. Therefore, chemical reactions types have been explored. 15. In some cases the reaction type is also called a "'retropinacol rearrangement "'( see Pinacol rearrangement ). 16. Another demonstration of this reaction type is an alternative route to tamoxifen starting from diphenylacetylene and ethyllithium: 17. In humans, two major coenzyme B 12-dependent enzyme families corresponding to the first two reaction types , are known. 18. Under these conditions, blading becomes strictly a reaction type design with the base of the blade solely impulse. 19. The basic reaction types are : addition reactions, elimination reactions, substitution reactions, pericyclic reactions, rearrangement reactions and redox reactions. 20. "That's a heated rivalry and if something happens, it's a reaction type deal, " said Wofford football coach Mike Ayers.
