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A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
Under aerobic conditions in soils or pure cultures, products of bromoxynil degradation often retain the original bromine groups. The herbicide, and one of its common degradation products (3,5-dibromo-4-hydroxybenzoic acid) have been shown to undergo metabolic reductive dehalogenation by the microorganism Desulfitobacterium chlororespirans. [6]
The following are subcategories containing chemical compounds by element. An alternative listing of inorganic compounds may be found at inorganic compounds by element . Wikimedia Commons has media related to Chemical compounds by element .
Here [Ne] refers to the core electrons which are the same as for the element neon (Ne), the last noble gas before phosphorus in the periodic table. The valence electrons (here 3s 2 3p 3) are written explicitly for all atoms. Electron configurations of elements beyond hassium (element 108) have never been measured; predictions are used below.
1,3-Dibromo-2-hydroxybenzene 3,4-Dibromophenol, 1,2-Dibromo-4-hydroxybenzene 3,5-Dibromophenol, 1,3-Dibromo-5-hydroxybenzene Structural formula: CAS Number: 57383-80-9: 615-58-7: 28165-52-8: 608-33-3: 615-56-5: 626-41-5 PubChem: CID 34264 from PubChem: CID 12005 from PubChem: CID 34177 from PubChem: CID 11847 from PubChem: CID 12003 from ...
A method of synthesis is to take tetrabromobisphenol A and react with epichlorohydrin using a base to form the halohydrin. [4] This species is then further reacted with sodium hydroxide to form the diglycidyl ether. [5]
It was also a popular fumigant in agriculture, displacing 1,2-dibromo-3-chloropropane ("DBCP"). Both applications are declining owing to environmental and health considerations. Methyl bromide is also an effective fumigant, but its production and use are controlled by the Montreal Protocol. Growing in use are organobromine biocides used in ...
A related class is cycloaliphatic epoxy resin, which contains one or more cycloaliphatic rings in the molecule (e.g. 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate). This class also displays lower viscosity at room temperature, but offers significantly higher temperature resistance than the aliphatic epoxy diluents.