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Topic: Ethyne

Related Topics

Acetylene

Alkyne

Butadiene

Unsaturated hydrocarbon

	PLI's Patent Bar Review
		All of the foregoing heteroaromatic ethyne compounds may be used in the same manner as the compounds of formula (I).
		Pharmaceutical compositions containing the heteroaromatic ethyne compounds may be prepared by mixing the compounds or an acid addition salt thereof with a pharmaceutical carrier according to conventional techniques.
		For oral administration, the conventional pharmaceutical diluent or carrier may be used, including liquid media such as water, glycols, and oils for preparation of elixirs, suspensions, and solutions; and solid carriers, such as starches, sugars, and kaolin alone or together with lubricants, binders, and disintegrating agents for preparation of powders, capsules, and tablets.
	www.patentbarreview.com /program/x_pm_95.html (6901 words)

	Alkynes (Site not responding. Last check: 2007-09-11)
		Ethyne is oxidised by a dilute aqueous solution of potassium permanganate to form oxalic acid.
		The reactions of ethynes indicate acidic properties for the hydrogens which are attached to the carbon atoms involved in the triple bond.
		Thus, the hydrogen attached to the carbon-carbon triple bond in ethyne, or in any alkyne where the carbon-carbon triple bond is situated at the end of a carbon chain, is able to separate from the rest of the molecule as a hydrogen ion, so that the alkyne shows acidic properties.
	www.ucc.ie /ucc/depts/chem/dolchem/html/dict/alkynes.html (1641 words)

	#1 Site For Learning Chemistry
		Ethyne is a colourless and tasteless gas at ordinary room temperatures.
		Ethyne or acetylene gas is a linear molecule.
		Ethyne is used for manufacture of synthetic plastics, synthetic rubbers, and synthetic fibers.
	home.att.net /~cat6a/org_chem-VI.htm (738 words)

	Ethyne Microscale Gas Chemistry
		Ethyne is relatively non-toxic; however, it is a simple asphyxiant if inhaled in very large quantities.
		Ethyne and permanganate react with cleavage of the carbon-carbon triple bond and formation of the formate ion and the carbonate ion.
		We have found that ethyne works particularly well and that a small fireball is noticed as the gas mixture ignites.
	mattson.creighton.edu /C2H2 (1429 words)

	Ethyne (Site not responding. Last check: 2007-09-11)
		Ethyne is made industrially from hydrocarbons obtained by cracking petroleum.
		Ethyne is also made industrially by the combustion of natural gas, which is mainly methane using insufficient oxygen.
		Ethyne is also made industrially by the arc process in which a temperature of 1773 degK is achieved by an electric discharge.
	www.ucc.ie /ucc/depts/chem/dolchem/html/comp/ethyne.html (482 words)

	Ethyne
		"Ethyne" is a common misspelling or typo for: ethane, thyme.
		"Ethyne" is generally used as a noun (proper) -- approximately 50.00% of the time.
		"Ethyne" is used about 4 times out of a sample of 100 million words spoken or written in English.
	www.websters-online-dictionary.org /et/ethyne.html (393 words)

	ethyne
		It is used in the manufacture of the synthetic rubber neoprene, and in oxyacetylene welding and cutting.
		Ethyne was discovered by English chemist Edmund Davy in 1836 and was used in early gas lamps, where it was produced by the reaction between water and calcium carbide.
		Its combustion provides more heat, relatively, than almost any other fuel known (its calorific value is five times that of hydrogen).
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0022506.html (147 words)

	Ethyne from LiveJournal (Site not responding. Last check: 2007-09-11)
		but when u add water ethyne is released and that smells a million times worse, and cause its a gas it goes every where.
		Ethyne is important to my life because it is used in welding and cutting metals.
		I accidentaly exploded a mixture of Chlorine Bleach and Ethyne.
	www.ljseek.com /search/Ethyne (745 words)

	Cyclohexene and bicyclic aromatic substituted ethyne compounds having retinoid-like biological activity - US Patent ... (Site not responding. Last check: 2007-09-11)
		It is generally known and accepted in the art that retinoid like activity is useful for treating animals of the mammalian species, including humans, for curing or alleviating the symptoms and conditions of numerous diseases and conditions.
		In accordance with Reaction Scheme 1 a cyclohexen-1-yl ethyne derivative of Formula 4 is converted into a metal salt, such as a zinc salt of Formula 2.
		Alternatively, the ethyne compound of Formula 4 can be coupled with the reagent of Formula 3 in the presence of cuprous iodide, a suitable catalyst, typically of the formula Pd(PQ Cl (Q is phenyl) and an acid acceptor, such as triethylamine, by heating in a sealed tube under an inert gas (argon) atmosphere.
	www.patentstorm.us /patents/5470999.html (4906 words)

	CHEMISTRY OF ETHYNE-ORBITAL STRUCTURE OF ETHYNE-PHYSICAL PROPERTIES OF ETHYNE-CHEMICAL PROPERTIES PROPERTIES OF ETHYNE
		Ethyne molecule consists of two C-atoms and two H-atoms (C
		In ethyne molecule, each carbon atom is Sp-hybridized.
		Ethyne is a colourless gas with a characteristic smell.
	www.citycollegiate.com /organic5.htm (186 words)

	Media Portfolio
		Ethyne consists of a carbon–carbon triple bond and two carbon–hydrogen single bonds.
		The first bond of a carbon–carbon triple bond is formed by the overlap of two sp hybrid orbitals on adjacent carbons in an end-on fashion.
		The carbon–hydrogen bonds are formed by the overlap of an sp hybrid on carbon with an s orbital on hydrogen.
	wps.prenhall.com /wps/media/objects/724/741576/chapter_01.html (3219 words)

	Ethyne derivatives as a component of liquid crystal phases - US Patent 5068053 (Site not responding. Last check: 2007-09-11)
		Ethyne derivatives as a component of liquid crystal phases
		There is furthermore the possibility of converting a corresponding benzil derivative into the ethyne derivative with hydrazine and then with HgO.
		Compounds of the formula I can also be prepared via coupling of alkynyl-zinc compounds with aryl halides by a process analogous to that described by A.O. King, E. Negishi, F.J. Villani and A. Silveira in J.Org.Chem.
	www.patentstorm.us /patents/5068053.html (3913 words)

	Chemistry International (Site not responding. Last check: 2007-09-11)
		Ethyne was probably first made in the laboratory by Edmund Davy in 1836.
		Since that time ethyne has become a cheap raw material for the synthesis of organic materials and an important industrial fuel.
		A summary of the available solubility data for ethyne was published by Miller in 1965 [S. A Miller, Acetylene–Its Properties, Manufacture, and Uses (Academic, New York, 1965), Vol.
	www.iupac.org /publications/ci/2002/2404/newbooks_sds76.html (391 words)

	Ethyne derivatives as a component of liquid crystal phases - Patent 5068053
		Ethyne derivatives as a component of liquid crystal phases - Patent 5068053
		Ethyne derivatives of the formula I R.sup.1 --(A.sup.1 --Z.sup.1).sub.m --A.sup.3 --C.tbd.C--A.sup.4 -(Z.sup.2 -A.sup.2).sub.n --R.sup.2 I wherein R.sup.1, A.sup.1, Z.sup.1 m, A.sup.3, A.sup.4, Z.sup.2, A.sup.2, n and R.sup.2 have the meaning given in claim 1 are suitable as components of liquid crystal phases.
		An ethyne derivative of Formula I ##STR4## wherein R.sup.1 and R.sup.2 in each case independently of one another are straight-chain alkyl, alkoxy, or oxaalkyl having 1 to 15 C atoms;
	www.freepatentsonline.com /5068053.html (4076 words)

	Physics Help and Math Help - Physics Forums - Normal electron configuration Ethyne
		According to t!m the answer is c), but that wouldn't make any sense for the electrons shared by the hydrogens and carbons.
		What everyone's trying to say, is that the C atoms in ethyne are bonded to each other by a triple bond.
		How you represent this triple bond doesn't matter terribly, as long as the other person knows what you mean.
	www.physicsforums.com /printthread.php?t=57740 (467 words)

	Chemisorbed ethene and ethyne on Cu(111) (Site not responding. Last check: 2007-09-11)
		Studies of ethylene (ethene) and acetylene (ethyne) chemisorbed on Cu(111), a surface with which they interact relatively weakly, have led to the following proposed structures for the molecular adsorption complexes.
		Plan view of the Cu(111) surface showing the adsorption geometry of athylene and acetylene molecules at low temperatures.
		Perspective view of the Cu(111) surface with an adsorbed acetylene molecule, illustrating the re-hybridisation of the carbon centres to a geometry more closely associated with a C=C double-bond configuration.
	www.chem.qmw.ac.uk /surfaces/scc/scat2_5a.htm (85 words)

	Addition of bromine to ethyne
		Ethene removes the colour from bromine water very quickly yet when I bubble ethyne through bromine water, the expected reaction doesn't happen.
		When I make ethyne from calcium carbide and water, and bubble the gas through bromine water, the orange/red colour does not fade quickly, yet when ethene is used, it fades almost quickly.
		Re: Addition of bromine to ethyne C-C double bonds and C-C triple bonds react quickly by addition.
	www.madsci.org /posts/archives/2000-08/966524663.Ch.q.html (208 words)

	CHEMISTRY OF ETHYNE-PHYSICAL PROPERTIES OF ETHYNE-CHEMICAL PROPERTIES PROPERTIES OF ETHYNE
		CHEMISTRY OF ETHYNE-PHYSICAL PROPERTIES OF ETHYNE-CHEMICAL PROPERTIES PROPERTIES OF ETHYNE
		Ethyne burns in air with a luminous smoky flame and hence used for lightening purpose.
		It is used in welding to produce oxy-acetylene flame of temperature about 3000oC.
	www.citycollegiate.com /organicixe.htm (89 words)

	Conclusion to the Methane and Ethyne Gas Production Lab
		3.) Click here to determine the amount of energy produced when methane and ethyne are burned.
		How much energy is produced when 1 mole of methane is burned?_____________ Is this reaction exothermic or endothermic?
		How much energy is produced when 1 mole of ethyne is burned?_____________Is this reaction exothermic or endothermic?
	academic.pg.cc.md.us /~ssinex/MVCW/gas_lab (216 words)

	Define ethyne : powered by In Dictionary (InDicitonary.com) (Site not responding. Last check: 2007-09-11)
		Define ethyne : powered by In Dictionary (InDicitonary.com)
		Use the form below to search our dictionaries by entering a word you wish to define.
		ethyne n : a colorless flammable gas used chiefly in welding and in organic synthesis [syn: acetylene, alkyne]
	www.indictionary.com /define/ethyne (229 words)

	Organic Nomenclature: Self Study Part 2 (Site not responding. Last check: 2007-09-11)
		The three-carbon compound in the ethyne series is called ________
		In the ethyne series it is called ________
		The five-carbon comound in the ethyne series is called ________
	www.ucdsb.on.ca /tiss/stretton/chem1/orgonom2.html (254 words)

	CHEM 515: Lab #2, Problem 2 (Site not responding. Last check: 2007-09-11)
		Look up the experimental numbers in any standard reference source.
		Do the carbon-carbon bond lengths get smaller or larger going from ethane to ethyne?
		What is the relationship between the bond length and the strength of the bond?
	www.sdsc.edu /chemdyn/chem515/labs/lab2/bndlnt.html (127 words)

	U.S. Pregrant 20020026088 - Acetaldehyde dehydration to produce ethyne (Site not responding. Last check: 2007-09-11)
		A process of dehydrating acetaldehyde to produce ethyne comprising passing acetaldehyde in the gas phase over a dehydration catalyst such as aluminum oxide which may be promoted with mercuric sulfate at a temperature of approximately 600 degrees Centigrade to produce ethyne and water and a cooling zone following the reaction zone.
		This method having the advantage of ease of separation of ethyne from the unreacted acetaldehyde and co-product water by simple condensation whereby the ethyne remains gaseous while the other compounds liquify and is thereby separated in essentially pure form.
		Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
	cxp.paterra.com /uspregrant20020026088.html (180 words)

	Fangtian Industries Co., LtdOxygen rubber hose and ethyne rubber hose (Site not responding. Last check: 2007-09-11)
		Fangtian Industries Co., LtdOxygen rubber hose and ethyne rubber hose
		Is one of the largest manufacturer of rubber hose in china.
		Our rubber hose include oxygen rubber hose and ethyne rubber hose.
	www.chinaexporter.com.cn /com/56829.htm (192 words)

	Alkyne strong base aldehyde alkoxide hydrocarbon alkyl halide anion ketone Physical properties acid ethyne (Site not responding. Last check: 2007-09-11)
		Alkyne strong base aldehyde alkoxide hydrocarbon alkyl halide anion ketone Physical properties acid ethyne
		To download this article in pdf format, just click here: Alkyne.pdf
		Alkynes are hydrocarbons that have at least one triple bond between carbon atoms.
	en.powerwissen.com /tTkclj5ommuPcasxeyOiIg%3D%3D_Alkyne.html (203 words)

	U.S. Pregrant 20040102647 - Acetaldehyde dehydration to produce ethyne (Site not responding. Last check: 2007-09-11)
		U.S. Pregrant 20040102647 - Acetaldehyde dehydration to produce ethyne
		A process to produce ethyne comprising passing acetaldehyde in the gas phase through a reaction zone containing a dehydrating metal oxide catalyst such as aluminum oxide or magnesium oxide at a temperature of approximately 375 C. to produce ethyne and water and a cooling zone following the reaction zone.
		This method having the advantage of ease of separation of ethyne from the co-product water and unreacted acetaldehyde by simple condensation whereby the acetaldehyde and water liquify while The ethyne remains gaseous.
	cxp.paterra.com /uspregrant20040102647.html (160 words)

Acetylene : Ethyne (Site not responding. Last check: 2007-09-11)

Acetylene : Ethyne

Acetylene : Ethyne
article at Free Euro Online Encyclopedia

It uses material from the wikipedia article Acetylene : Ethyne.

www.eurofreehost.com /et/Ethyne.html (234 words)

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