Michael Polányi is well known for his contributions to the theory of reaction rates, especially for the construction of the potential-energy surface for chemical reactions, which theory was developed independently also by H. Eyring in 1935 in 1931 and later for the elaboration of the transition state theory. The starting point of Horiuti Polányi paper was the relationship between the heat of activation and the heat of reaction. Horiuti and Polányi have done research for proton transfer including electrolytic dissociation, prototropy, catalytic hydrolysis of esters. In the early 1930s, Polányi visited the Soviet Union and became friends with Soviet chemists, especially with Alexander Frumkin and Nicolai Semenoff published several papers also in other Soviet scientific journals. Polányi finished his activity in science in 1949, and he became a major figure in several branches of philosophy especially of philosophy of science and political philosophy until his death in 1976.
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