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  1. In the second step, the hydroxyl group is reacted with a phosphonic acid derivative, using tert-butyllithium as base to ensure selective O-alkylation, with the formation of an ether bond. Tenofovir is formed when the diethyl phosphonate group is converted to its acid using trimethylsilyl chloride in the presence of sodium bromide, a further ...

  2. Emergency Response Guidebook 2016. The 2016 Emergency Response Guidebook, developed jointly by Transport Canada (TC), the U.S. Department of Transportation (DOT), the Secretariat of Communications and Transport of Mexico (SCT) and with the collaboration of CIQUIME (Centro de Información Química para Emergencias) of Argentina, provides first responders during the initial phase of a ...

  3. Thiosulfate salts characteristically decompose upon treatment with acids. Initial protonation occurs at sulfur. When the protonation is conducted in diethyl ether at −78 °C, H 2 S 2 O 3 (thiosulfuric acid) can be obtained. It is a somewhat strong acid with pK a s of 0.6 and 1.7 for the first and second dissociations, respectively.

  4. Composition. It is the salt derived from the ammonium cation and the hydrosulfide anion.The salt exists as colourless, water-soluble, micaceous crystals. On Earth the compound is encountered mainly as a solution, not as the solid, but [NH 4]SH ice is believed to be a substantial component of the cloud decks of the gas-giant planets Jupiter and Saturn, with sulfur produced by its photolysis ...

  5. Lithium hydride is an inorganic compound with the formula Li H.This alkali metal hydride is a colorless solid, although commercial samples are grey. Characteristic of a salt-like (ionic) hydride, it has a high melting point, and it is not soluble but reactive with all protic organic solvents.

  6. 에탄올(영어: ethanol)은 화학식이 C 2 H 6 O인 유기 화합물로 알코올의 한 종류이다. 에탄올은 또한 에틸 알코올(영어: ethyl alcohol), 그레인 알코올(영어: grain alcohol), 주정(酒精, 영어: spirit), 드링킹 알코올(영어: drinking alcohol), 단순하게 알코올(영어: alcohol)이라고 부르기도 한다.

  7. Pyrophosphoric acid, also known as diphosphoric acid, is the inorganic compound with the formula H 4 P 2 O 7 or, more descriptively, [(HO) 2 P(O)] 2 O. Colorless and odorless, it is soluble in water, diethyl ether, and ethyl alcohol. The anhydrous acid crystallizes in two polymorphs, which melt at 54.3 and 71.5 °C.

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