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The vast majority of simple inorganic (e.g. sodium chloride) and organic compounds (e.g. ethanol) are colorless. Transition metal compounds are often colored because of transitions of electrons between d-orbitals of different energy. (see Transition metal#Colored compounds).
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 ).
Ethylene oxide is a colorless gas at 25 °C (77 °F) and is a mobile liquid at 0 °C (32 °F) – viscosity of liquid ethylene oxide at 0 °C is about 5.5 times lower than that of water. The gas has a characteristic sweet odor of ether, noticeable when its concentration in air exceeds 500 ppm. [ 26 ]
Bromine: Liquid Br 2: 0 Bromide ion: Aqueous Br −: −121 Bromine: Gas Br 111.884 Bromine: Gas Br 2: 30.91 Bromine trifluoride: Gas BrF 3: −255.60 Hydrogen bromide: Gas HBr −36.29 Cadmium: Solid Cd 0 Cadmium oxide: Solid CdO −258 Cadmium hydroxide: Solid Cd(OH) 2: −561 Cadmium sulfide: Solid CdS −162 Cadmium sulfate: Solid CdSO 4 ...
Industrially, it is mainly produced by the reaction of hydrogen gas with bromine gas at 200–400 °C with a platinum catalyst. However, reduction of bromine with red phosphorus is a more practical way to produce hydrogen bromide in the laboratory: [2] 2 P + 6 H 2 O + 3 Br 2 → 6 HBr + 2 H 3 PO 3 H 3 PO 3 + H 2 O + Br 2 → 2 HBr + H 3 PO 4
Bromine dioxide (BrO 2) Bromine can form several different oxides: Dibromine monoxide (Br 2 O) Bromine dioxide (BrO 2) Dibromine trioxide (Br 2 O 3) Dibromine pentoxide (Br 2 O 5) Tribromine octoxide (Br 3 O 8) Also, a number of ions are bromine oxides: Hypobromite (BrO −) Bromite (BrO 2 −) Bromate (BrO 3 −) Perbromate (BrO 4 −) And the ...
It was stated that the action of heated sodium hydroxide upon β,β`-dichlorodiethyl ether produced a liquid boiling at 39 °C (among other identified products). [2] However, in a subtly modified process Hibbert et al. reported the isolation of a product boiling at 34-35 °C, "divinyl ether".
The bromine test can also be used as an indication of the degree of unsaturation for unsaturated hydrocarbons. Bromine number is defined as gram of bromine able to react with 100g of product. [18] Similar as hydrogenation, the halogenation of bromine is also depend on the number of π bond. A higher bromine number indicates higher degree of ...