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Battle of Cao Binh or Fall of Cao Binh, was the last battle of the Mạc dynasty's army in Vietnam history, when Trịnh Lords's army attack Cao Binh Citadel - the last capital of the Mạc dynasty. The battle happened in August 1677, at Cao Bằng , North Vietnam.
Map of Cao Bang province in 1909. Cao Bằng's history can be traced to the Bronze Age when the Tày Tây Âu Kingdom flourished. The Tây Âu or Âu Việt were a conglomeration of upland Tai tribes living in what is today the mountainous region of northernmost Vietnam, western Guangdong, and southern Guangxi, China, since at least the 3rd century BC.
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.
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
Chlorobis(ethylene)rhodium dimer is an organorhodium compound with the formula Rh 2 Cl 2 (C 2 H 4) 4.It is a red-orange solid that is soluble in nonpolar organic solvents. The molecule consists of two bridging chloride ligands and four ethylene ligands.
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).
Isobutylene is used in the production of a variety of products. It is alkylated with butane to produce isooctane or dimerized to diisobutylene (DIB) and then hydrogenated to make isooctane, a fuel additive.