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Cao Thắng (Chinese: 高勝, 1864 - 1893) was a Vietnamese anticolonial fighter. He was an assistant of Phan Đình Phùng, and was Phan's military coordinator. His forces operated in Thanh Hóa, Nghệ An and Hà Tĩnh provinces. He was killed in battle in 1893. [1]
1,2-Dibromoethane, also known as ethylene dibromide (EDB), is an organobromine compound with the chemical formula C 2 H 4 Br 2.Although trace amounts occur naturally in the ocean, where it is probably formed by algae and kelp, substantial amounts are produced industrially.
Ethylene (IUPAC name: ethene) is a hydrocarbon which has the formula C 2 H 4 or H 2 C=CH 2.It is a colourless, flammable gas with a faint "sweet and musky" odour when pure. [7] It is the simplest alkene (a hydrocarbon with carbon–carbon double bonds).
Phase behavior Triple point: 104 K (−169 °C), 120 Pa Critical point: 282.5 K (9.4 °C), 50.6 bar Std enthalpy change of fusion, Δ fus H o +3.35 kJ/mol Std entropy change
In organic chemistry, an addition reaction is an organic reaction in which two or more molecules combine to form a larger molecule called the adduct. [1] [2]An addition reaction is limited to chemical compounds that have multiple bonds.
Chloroethane is produced by hydrochlorination of ethylene: [11]. C 2 H 4 + HCl → C 2 H 5 Cl. At various times in the past, chloroethane has also been produced from ethanol and hydrochloric acid, from ethane and chlorine, or from ethanol and phosphorus trichloride, but these routes are no longer economical.
CaO + Br 2 + HCO 2 H → CaBr 2 + H 2 O + CO 2. Solid calcium bromide adopts the rutile structure, featuring octahedral Ca 2+ centres bound to six bromide anions, which also bridge to other Ca 2+ centres. When strongly heated in air, calcium bromide reacts with oxygen to produce calcium oxide and bromine: 2 CaBr 2 + O 2 → 2 CaO + 2 Br 2