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Crown ether

Index Crown ether

Crown ethers are cyclic chemical compounds that consist of a ring containing several ether groups. [1]

38 relations: Alkali metal, Amine, Amino acid, By-product, Calcium, Catechol, Charles J. Pedersen, Chelation, Chemical compound, Chemist, Coordination complex, Crown (headgear), Cryptand, Cyclen, Dibenzo-18-crown-6, DuPont, Ether, Ethylene oxide, Hydroxy group, Ion, Ion selective electrode, Ionization, Ionophore, Lasso, Ligand, Lysine, Magnesium, Metallacrown, Nobel Prize in Chemistry, Oligomer, Organic synthesis, Oxygen, Phase-transfer catalyst, Potassium, Valinomycin, 15-Crown-5, 18-Crown-6, 9-Crown-3.

Alkali metal

The alkali metals are a group (column) in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K),The symbols Na and K for sodium and potassium are derived from their Latin names, natrium and kalium; these are still the names for the elements in some languages, such as German and Russian.

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In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair.

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Amino acid

Amino acids are organic compounds containing amine (-NH2) and carboxyl (-COOH) functional groups, along with a side chain (R group) specific to each amino acid.

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A by-product is a secondary product derived from a manufacturing process or chemical reaction.

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Calcium is a chemical element with symbol Ca and atomic number 20.

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Catechol, also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula C6H4(OH)2.

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Charles J. Pedersen

Charles John Pedersen (October 3, 1904 – October 26, 1989) was an American organic chemist best known for describing methods of synthesizing crown ethers.

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Chelation is a type of bonding of ions and molecules to metal ions.

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Chemical compound

A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) composed of atoms from more than one element held together by chemical bonds.

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A chemist (from Greek chēm (ía) alchemy; replacing chymist from Medieval Latin alchimista) is a scientist trained in the study of chemistry.

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Coordination complex

In chemistry, a coordination complex consists of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.

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Crown (headgear)

A crown is a traditional symbolic form of headwear, or hat, worn by a monarch or by a deity, for whom the crown traditionally represents power, legitimacy, victory, triumph, honor, and glory, as well as immortality, righteousness, and resurrection.

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Cryptands are a family of synthetic bi- and polycyclic multidentate ligands for a variety of cations.

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Cyclen or 1,4,7,10-tetraazacyclododecane is a macrocycle and the aza analogue of the crown ether 12-crown-4.

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Dibenzo-18-crown-6 is a benzannulated crown ether.

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Ethers are a class of organic compounds that contain an ether group—an oxygen atom connected to two alkyl or aryl groups.

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Ethylene oxide

Ethylene oxide, called oxirane by IUPAC, is an organic compound with the formula. It is a cyclic ether and the simplest epoxide: a three-membered ring consisting of one oxygen atom and two carbon atoms. Ethylene oxide is a colorless and flammable gas with a faintly sweet odor. Because it is a strained ring, ethylene oxide easily participates in a number of addition reactions that result in ring-opening. Ethylene oxide is isomeric with acetaldehyde and with vinyl alcohol. Ethylene oxide is industrially produced by oxidation of ethylene in the presence of silver catalyst. The reactivity that is responsible for many of ethylene oxide's hazards also make it useful. Although too dangerous for direct household use and generally unfamiliar to consumers, ethylene oxide is used for making many consumer products as well as non-consumer chemicals and intermediates. These products include detergents, thickeners, solvents, plastics, and various organic chemicals such as ethylene glycol, ethanolamines, simple and complex glycols, polyglycol ethers, and other compounds. Although it is a vital raw material with diverse applications, including the manufacture of products like polysorbate 20 and polyethylene glycol (PEG) that are often more effective and less toxic than alternative materials, ethylene oxide itself is a very hazardous substance. At room temperature it is a flammable, carcinogenic, mutagenic, irritating, and anaesthetic gas. As a toxic gas that leaves no residue on items it contacts, ethylene oxide is a surface disinfectant that is widely used in hospitals and the medical equipment industry to replace steam in the sterilization of heat-sensitive tools and equipment, such as disposable plastic syringes. It is so flammable and extremely explosive that it is used as a main component of thermobaric weapons; therefore, it is commonly handled and shipped as a refrigerated liquid to control its hazardous nature.Rebsdat, Siegfried and Mayer, Dieter (2005) "Ethylene Oxide" in Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH, Weinheim..

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Hydroxy group

A hydroxy or hydroxyl group is the entity with the formula OH.

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An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).

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Ion selective electrode

An ion-selective electrode (ISE), also known as a specific ion electrode (SIE), is a transducer (or sensor) that converts the activity of a specific ion dissolved in a solution into an electrical potential.

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Ionization or ionisation, is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.

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An ionophore is a chemical species that reversibly binds ions.

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A lasso, from the Castilian word, Lazo.

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In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex.

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Lysine (symbol Lys or K) is an α-amino acid that is used in the biosynthesis of proteins.

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Magnesium is a chemical element with symbol Mg and atomic number 12.

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Figure showing the metallacrown analogy to the organic crown ether. Ligand substituents are omitted for clarity.'''a)''' 12-crown-4 '''b)''' 12-MCFe(III)N(shi)-4'''c)''' 15-crown-5 '''d)''' 15-MCCu(II)N(picHA)-5 Metallacrowns are a unique class of macrocyclic compounds that consist of metal ions and solely or predominantly heteroatoms in the ring.

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Nobel Prize in Chemistry

The Nobel Prize in Chemistry (Nobelpriset i kemi) is awarded annually by the Royal Swedish Academy of Sciences to scientists in the various fields of chemistry.

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An oligomer (oligo-, "a few" + -mer, "parts") is a molecular complex of chemicals that consists of a few monomer units, in contrast to a polymer, where the number of monomers is, in principle, infinite.

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Organic synthesis

Organic synthesis is a special branch of chemical synthesis and is concerned with the intentional construction of organic compounds.

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Oxygen is a chemical element with symbol O and atomic number 8.

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Phase-transfer catalyst

In chemistry, a phase-transfer catalyst or PTC is a catalyst that facilitates the migration of a reactant from one phase into another phase where reaction occurs.

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Potassium is a chemical element with symbol K (from Neo-Latin kalium) and atomic number 19.

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Valinomycin is a naturally occurring dodecadepsipeptide used in the transport of potassium and as an antibiotic.

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15-Crown-5 is a crown ether with the formula (C2H4O)5.

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18-Crown-6 is an organic compound with the formula 6 and the IUPAC name of 1,4,7,10,13,16-hexaoxacyclooctadecane.

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9-Crown-3, also called 1,4,7-trioxonane or 1,4,7-trioxacyclononane is a crown ether with the formula C6H12O3.

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Crown Ethers, Crown compound, Crown ethers, Lariat crown ether, Lariat ether.


[1] https://en.wikipedia.org/wiki/Crown_ether

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