Aleksandr Butlerov
Alexander Mikhaylovich Butlerov (Алекса́ндр Миха́йлович Бу́тлеров; 15 September 1828 – 17 August 1886) was a Russian chemist, one of the principal creators of the theory of chemical structure (1857–1861), the first to incorporate double bonds into structural formulas, the discoverer of hexamine (1859), the discoverer of formaldehyde (1859) and the discoverer of the formose reaction (1861). He first proposed the idea of possible tetrahedral arrangement of valence bonds in carbon compounds in 1862. The crater Butlerov on the Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width ... is named after him. Alexander Butlerov was born in Chistopol into a landowning family. References * * * * * 1828 births 1886 deaths People fro ...
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Chistopol
Chistopol (russian: Чи́стополь; tt-Cyrl, Чистай, ''Çistay''; cv, Чистай, ''Çistay'') is a town in Tatarstan, Russia, located on the left bank of the Kuybyshev Reservoir, on the Kama River. As of the 2010 Census, its population was 60,755. History It was first mentioned in chronicles at the end of the 17th century. It developed very quickly, and by 1761 the number of inhabitants exceeded 1,000. In 1781, a decree by Catherine the Great granted Chistopol the status of an uyezd town, with the establishment of its own coat of arms. At the end of the 19th century, Chistopol became a major center of trade for grain. Prior to 1917, it was the second largest town (after Kazan) in Kazan Governorate. During the Great Patriotic War, Chistopol become a shelter for the Union of Soviet Writers, which included Boris Pasternak, Leonid Leonov and other notables. The town is notable for its Vostok watches factory, which was founded in 1942. Chistopol was