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Alexandr Mikhailovich Zaitsev was Kazan university professor (1871-1910), corresponding member of St-Petersburg Academy of Science (1885), President of Russian Physics-Chemistry Society (1905, 1908, 1909), the greatest representative of Kazan Chemistry School, closest and most favourite disciple of A.M.Butlerov.
A.M.Zaitsev developed and improved Butlerov's syntheses of various spirits, known in the history of Chemistry as "Zaitsev's spirits" and "Zaitsev's syntheses". Chemical science knows empirical "rules of Markovnikov-Zaitsev" about the order of halogen acids' elements adding to hydrocarbons and the back reaction of their detachment. He founded a great school of chemists.
Flavian Mikhailovich Flavitsky was an Honored ordinary professor at Kazan university (1899), corresponding member of St-Petersburg Academy of Science (1907), belonging to the type of scientists, rare even in late 19th century, who successfully worked in all spheres of Chemistry. Thus, starting his scientific activity as a disciple of a physicist-chemist N.N.Beketov, he studied at A.M.Butlerov's laboratory in St.-Petersburg University (1870-1873).
At Kazan University, he founded his own Chemistry school, namely that of terpenes, (the main components of conifers' resin); he started the introduction of physical methods in organic chemistry. He also wrote serious works on dendrochemistry and on the obtainment of resin by tapping. He stated some original ideas in non-organic and physical chemistry, attempting to create a united theory of chemical compounds' construction and form, solutions' properties, and the interaction of matters in solid condition. He was the pioneer of microchemical analysis method.
Yegor Yegorovich Vagner was the greatest 19th century organic chemist, a graduate of Kazan University (1874), professor of Novoalexandriyskiy Institute of Agriculture and Forestry (1882-1886) and Warsaw University (since 1886).
He got worldwide credit for his research in the sphere of organic synthesis. He discovered a new reaction of obtaining secondary and tertiary alcohols (1875), offered a reaction of organic unsaturates' oxidation by manganese permanganate (Vagner's reaction, or oxidation by Vagner) (1887). He also discovered camphene regrouping of the first kind (Vagner-Meervein regrouping) (1889). The scientist managed to decipher the composite construction of many terpene class representatives, ordering the sphere which had remained chaotic for a long time before. Vagner is also known as a brilliant pedagogue and a skilled organizer of scientific-research Chemistry centers.
Alexandr Yerminingel'dovich Arbuzov was a professor (1915), an academician (1942), the organizer and director of Scientific-research Chemistry Institute in the name of A.M.Butlerov opened at the University (1929-1960). He was the first Presidium Chair of the USSR Academy of Science branch organized in Kazan (1946-1963). He won the USSR State Prize (1943, 1947). In 1957, the degree of Hero of Socialistic Labor was conferred upon him.
He founded the Soviet scientific school f phosphor-organists. "Arbuzov' regrouping", i.e. conversion of trialkylphosphates into ether of phosphine acids, became the basis of synthesizing a number of phosphor-organic compounds. In 1914-1916 he organized in Kazan the manufacture of drugs (salicylic acid, aspirin and salol). He wrote works on tautomerism таутометрии, chemical technology, the history og Russian organic chemistry, especially Kazan Chemistry School. He was excellent at glass-blowing, a keen lover of painting, a brilliant violinist; he also loved fishing with a spinning.