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RXNO:0000018. The 1,3-dipolar cycloaddition is a chemical reaction between a 1,3-dipole and a dipolarophile to form a five-membered ring. The earliest 1,3-dipolar cycloadditions were described in the late 19th century to the early 20th century, following the discovery of 1,3-dipoles.
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ASD was originally invented by Russian researcher A. V. Dorogov in the 1940s and initially kept secret and allowed only for army and special services use. Since the 1990s it has been produced in a biochemical factory in Armavir and registered in Russia as official drug for animal-only usage and recommended for skin diseases in pigs and cows.
One half is a rational number that lies midway between nil and unity (which are the elementary additive and multiplicative identities) as the quotient of the first two non-zero integers, . It has two different decimal representations in base ten, the familiar and the recurring , with a similar pair of expansions in any even base; while in odd ...
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The production of 1,3-dichloro-1,1,2,2,3-pentafluoropropane and use as a cleaning agent replacement for CFC-113 may result in its release to the environment through various waste streams. If released to air, a vapor pressure of 286 mm Hg at 25 °C indicates 1,3-dichloro-1,1,2,2,3-pentafluoropropane will exist solely as a vapor in the ambient ...
June 21, 2024 at 3:00 AM. Getty Images. Oakley founder James Jannard reportedly set a new state record when he offloaded his massive beachfront home in Malibu, California. Selling the mansion and ...
Infobox references. 1,2-Dibromo-3-chloropropane ( dibromochloropropane ), better known as DBCP, is the organic compound with the formula BrCH (CH 2 Br) (CH 2 Cl). It is a dense colorless liquid although commercial samples often appear amber or even brown. It is the active ingredient in the nematicide Nemagon, also known as Fumazone .