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Tetrahydrofuran (THF), or oxolane, is an organic compound with the formula (CH 2) 4 O. The compound is classified as heterocyclic compound , specifically a cyclic ether . It is a colorless, water- miscible organic liquid with low viscosity .
This is a list of CAS numbers by chemical formulas and chemical compounds, indexed by formula.The CAS number is a unique number applied to a specific chemical by the Chemical Abstracts Service (CAS).This list complements alternative listings to be found at list of inorganic compounds and glossary of chemical formulae
Phase behavior Triple point: 164.76 K (−108.39 °C), ? Pa Critical point: 541 K (268 °C), 5190 kPa Std enthalpy change of fusion, Δ fus H o: 8.540 kJ/mol Std entropy change
Screenshot of the CAS Common Chemistry database with information about caffeine ().. A CAS Registry Number [1] (also referred to as CAS RN [2] or informally CAS Number) is a unique identification number, assigned by the Chemical Abstracts Service (CAS) in the US to every chemical substance described in the open scientific literature, in order to index the substance in the CAS Registry.
Tetrahydrofurfuryl acetate is an organic chemical compound used for food flavouring and cosmetics. It has a fruity ethereal flavour, [3] also described as honey, maple, or bread-like. [4] It is generally accepted as safe in the USA. [5]
Deuterated tetrahydrofuran (d 8-THF) is a colourless, organic liquid at standard temperature and pressure. [1] This heterocyclic compound has the chemical formula C 4 D 8 O, and is an isotopologue of tetrahydrofuran. [2] Deuterated THF is used as a solvent in NMR spectroscopy, though its expense can often be prohibitive. [citation needed]
Hydrogenation of furfuryl alcohol can proceed to give hydroxymethyl derivative of tetrahydrofuran and 1,5-pentanediol. The etherification reaction of furfuryl alcohol with alkyl or aryl halide (e.g. benzyl chloride) in the liquid-liquid-liquid triphase system with the help of a phase transfer catalyst also reported. [7]
It is dissimilar vs ethers such as tetrahydrofuran. Like enol ethers, 2,5-disubstituted furans are susceptible to hydrolysis to reversibly give 1,4-diketones. Furan serves as a diene in Diels–Alder reactions with electron-deficient dienophiles such as ethyl ( E )-3-nitroacrylate. [ 15 ]