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Topic: Ethene

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Ethane

Trichloroethylene

Acrylonitrile

Sulphuric acid

Hydrogen cyanide

Hydrogen

Sulfuric acid

Ammonia

Hydrochloric acid

Ethanol

Polymerization

Polyethylene

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	Ethene release from fruits
		Ethene is an important plant growth substance, and plays an essential role in the triggering of ripening in many fruits.
		The precise nature of the ethene receptor on plant cells and the molecular basis of its action is not fully understood, but research is currently being carried out with mutants defective in this particular control system.
		So, if you wish to follow the production of ethene by a ripening banana over a 5-day period, you need to sow seeds 2 days before the first seedlings were to be exposed, and then every day for the next 4 days.
	www-saps.plantsci.cam.ac.uk /osmoweb/ethene.htm (641 words)

	Kids.Net.Au - Encyclopedia > Ethene
		Ethene or ethylene is the simplest alkene hydrocarbon, consisting of two carbon atoms and four hydrogens.
		Ethene is often known as an unsaturated hydrocarbon due to it having a double bond rather than additional hydrogen atoms bonded.
		The catalyst for hydrating ethene is typically phosphoric acid adsorbed onto a silica surface, or sulphuric acid.
	www.kids.net.au /encyclopedia-wiki/et/Ethene (224 words)

	ETHENE
		Ethene is an unsaturated hydrocarbon, which is composed of two carbon and four hydrogen atoms.
		Therefore in ethene one sigma and one pi bond is present between carbon atoms.
		Ethene is unsaturated hydrocarbon, which is composed of two carbon and four hydrogen atoms.
	www.awamimarkaz.com /education/members/NOTES/CHEMXII/Ethene.asp (789 words)

	ethene
		Ethene is produced during plant metabolism and is classified as a plant hormone.
		It is important in the ripening of fruit and in abscission.
		Small amounts of ethene are often added to the air surrounding fruit to artificially promote ripening.
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0010211.html (310 words)

	ChemViz Determination of Pi Bond Strength in the Ethene Molecule Lab
		In the Torsional Rotation of Ethene Lab, one of the CH groups is rotated ninety degrees out of the plane of the ethene molecule to determine the pi bond strength in ethene.
		In this lab the pi bond strength in the ethene molecule is determined by optimizing the carbon-carbon bond length during this transition.
		In a similar manner determine the Cartesian coordinates for the ethene molecule at a rotational angle of ninety degrees, at the carbon to carbon internuclear distance of 1.34 and 1.46 Ångstroms.
	chemviz.ncsa.uiuc.edu /content/lab-s-pibond.html (729 words)

	Ethene - the key to ripening
		Ethene has a deceptively simple structure and is lighter than air in physiological conditions - so it diffuses rapidly amongst the air spaces of a plant, and between plants.
		A bioassay for measuring ethene concentrations was developed in 1901, using the so-called triple response of etiolated pea seedlings.
		Climacteric fruits can be induced to ripen by the application of ethene, and this is something that has been exploited by commercial suppliers in management of their fruit stores - so that the fruit is ripened at just the right time for sale.
	www-saps.plantsci.cam.ac.uk /osmoweb/ethenemenu.htm (590 words)

	ethene
		Ethene is a colorless, flammable gas, with a slightly sweet smell.
		Ethene is made by cracking hydrocarbons from petroleum and is an important raw material for making other organic chemicals, including ethanal, ethanol, and ethane-1,2-diol.
		Ethene occurs naturally in plants, in which it serves as a growth substance.
	www.daviddarling.info /encyclopedia/E/ethene.html (174 words)

	Ethylene Summary
		Ethene or ethylene is the simplest member of the alkene group.
		Ethene also is used in the manufacture of polyvinyl chloride (PVC) and polystyrene, and ethene gas promotes the ripening of many fruits, such as apples and bananas.
		Ethene is the most commonly manufactured organic chemical and it is then processed in various ways to make many of the plastics on which modern society depends.
	www.bookrags.com /Ethylene (2511 words)

	KCPC Education Resource Web Site: 9.2.1 Ethene as a Monomer
		Natural gas (or gas oils from the catalytic cracking of crude oil) are heated to 750-900 °C in the presence of steam.
		We don't burn ethene (what a dreadful waste of a great industrial feedstock that would be), but use it as the basis for other chemicals.
		Ethene is a valuable intermediate - a compound that can be readily converted into many other useful chemical compound.
	www.kcpc.usyd.edu.au /discovery/9.2.1/9.2.1_Ethene.html (200 words)

	bonding in ethene - sp2 hybridisation
		Ethene is actually much more interesting than this.
		An ordinary line represents a bond in the plane of the screen (or the paper if you've printed it), a broken line is a bond going back away from you, and a wedge shows a bond coming out towards you.
		In almost all cases where you will draw the structure of ethene, the sigma bonds will be shown as lines.
	www.chemguide.co.uk /basicorg/bonding/ethene.html (825 words)

	#1 Site For Learning Chemistry
		Ethene is an odourless, colourless and tasteless gas at ordinary room temperatures.
		Ethene is found in coal gas and in natural gas to some extent.
		When ethene gas is heated at a temperature of 200°C and at a pressure of 2000 atmospheres, it polymerizes to become a solid called ploythese.
	home.att.net /~cat6a/org_chem-V.htm (820 words)

	Alkenes
		Thus, ethene reacts readily with hydrogen iodide and with hydrogen bromide at room temperature to form ethyl iodide and ethyl bromide, respectively.
		However, with higher members of the ethene series, the orientation of the addition of asymmetric molecules across the double bond is governed by the Markownikoff Rule.
		The first bond between the carbon atoms in ethene is a s bonds (sigma bonds) and is similar to the carbon to carbon bond found in the alkane series.
	www.ucc.ie /academic/chem/dolchem/html/dict/alkenes.html (824 words)

	Methods and Procedures--WRIR 99-4285
		Ethene and ethane (byproducts of VC degradation) data were available for water samples collected from selected shallow and deep wells beginning in 1997.
		Chlorinated-ethene, ethene, and ethane data for water samples from shallow and deep wells were converted to micromolar concentrations and examined for spatial and temporal trends that could indicate the occurrence of reductive dechlorination.
		Additional chlorinated ethene analyses were performed using GC with headspace analysis and a photoionization detector.
	pubs.usgs.gov /wri/wri994285/text/methods.html (1885 words)

	Ethene (C2H4) and Propene (C3H6)
		A comparison with surface measurements for ethene and propene is presented in Figure 3.14.
		Donahue and Prinn (1993) over the Pacific near the equator for ethene and propene were 30-100 pmol/mol and 20-80 pmol/mol, respectively, whereas the model shows only 10-20 pmol/mol and 2-6 pmol/mol.
		The vertical profile is more sensitive to the different vertical transport characteristics of the two resolutions and upper tropospheric concentrations of ethene over the biomass burning regions are overestimated by the high resolution run, whereas the low resolution run is in agreement with the observations.
	www.mpch-mainz.mpg.de /~kuhlmann/rvkdisshtml/node47.html (772 words)

	Copolymerization of Ethene with Styrene Using Methylaluminoxane-Activated Bis(phenolate) Complexes
		Copolymerization of Ethene with Styrene Using Methylaluminoxane-Activated Bis(phenolate) Complexes
		Ethene was copolymerized with styrene using different titanium bis(phenolate) complexes [R
		Solvent extraction of copolymers with subsequent NMR analysis revealed the presence of random poly(ethene-co-styrene) with inhomogeneity with respect to both styrene incorporation and molecular mass distribution, typical for multisite Ziegler-Natta catalysts.
	pubs.acs.org /cgi-bin/abstract.cgi/mamobx/1997/30/i06/abs/ma961443j.html (257 words)

	IUPAC-NIST Solubilities Database
		measured the solubility of ethene in water, the pure alcohol and four mixtures of 0.2, 0.4, 0.6 and 0.8 mole fraction alcohol at 298.15 K by a volumetric method for each of the three systems.
		Measurements are reported at five temperatures between 281 K and 298 K and at ethene pressures between 1.013 and 5.238 MPa (10 - 51.7 atm).
		report ethene solubility at 273, 278, 288 and 293 K and 13.3 -101.3 kPa in mixed solvents of 0 to 0.557 mole fraction water.
	srdata.nist.gov /solubility/sol_detail.asp?sys_ID=57_42 (679 words)

	Ethene:Properties, Uses, Production
		Ethene is also used as a plant hormone to control the ripening and colour development of fruit
		To maximize the yield of ethene, by Le Chetalier's Principle
		ethene as a plant hormone used to ripen fruit
	www.ausetute.com.au /ethene.html (338 words)

	Ethene Spectrum
		Their carbon 1s measurements have an overall experimental resolution of 55 meV, with no additional information expected from further improvements in resolution because the natural linewidths of ethene's carbon 1s hole states are 90-100 meV.
		The measured spectrum conforms very well to a model of core-ionized ethene in which the core hole vacated by the ejected photoelectron is localized to one carbon or the other.
		The red curve is the spectrum calculated on the basis of a localized core hole, along with other appropriate theoretical assumptions, and dispersed to show the combined effects of experimental resolution, lifetime broadening, and post-collision interaction.
	www-als.lbl.gov /als/science/sci_archive/ethene.html (292 words)

	CHEMystery: Organic Chemistry: Alkenes and Alkynes
		The geometry of ethyne is linear, as shown above, but the structure of ethene and propene are different than what you see in the structural formula.
		Also, the location number should be given as to where the double bond is (except ethene or propene, where the location will always be 1).
		Another reaction involves ethene and water, giving ethanol (ethyl alcohol), while sulfuric acid acts like a catalyst.
	library.thinkquest.org /3659/orgchem/alkenes-alkynes.html (462 words)

	Method of bonding utilizing imide ester derivatives of ethene maleic anhydride copolymers - Patent 3964954
		Imide - ester derivatives of ethene - maleic anhydride copolymers are prepared in a two step reaction.
		In accordance with this invention the copolymer derivatives are prepared in a two step reaction wherein the active ingredients comprise an ethene-maleic anhydride copolymer, an alcohol and an amino compound.
		The useful copolymers are linear copolymers of ethene and maleic anhydride having an average molecular weight between about 10,000 and 25,000, particularly an average molecular weight between about 15,000 and 20,000.
	www.freepatentsonline.com /3964954.html (1881 words)

	AllRefer.com - ethene Information
		Ethene is produced during plant metabolism and is classified as a plant hormone.
		It is important in the ripening of fruit and in abscission.
		Small amounts of ethene are often added to the air surrounding fruit to artificially promote ripening.
	www.allrefer.com /ethene (228 words)

	Preparation of ethene
		Sulphuric acid is corrosive; ethanol and ethene are flammable.
		Allow the gas to escape from the tube until a test-tube of the gas proves to be pure ethene.
		Ethene is flammable and it is important not to ignite the gas issuing from the delivery tube.
	www.rod.beavon.clara.net /ethene_prep.htm (631 words)

	Petrochemicals: Introduction and Aliphatic Compounds
		The ethene is obtained in part from refinery gases but primarily from stripper plants, which extract the ethane from natural gas.
		Ethene is produced from ethane by cracking, followed by separation of fractions where necessary: C
		About 13% of the ethene is chlorinated to 1,2-dichloroethane (dichloroethane) or to ethylene dichloride.
	www.cartage.org.lb /en/themes/Sciences/Chemistry/Organicchemistry/Organicindustriel/Petrochemicals/Petrochemicals.htm (1138 words)

	Polymers
		A catalyst is a substance that alters (usually speeds up) the rate of a chemical reaction, but remains chemically unchanged itself at the end of the reaction.
		So it appears that the small ethene molecules (which exist as a gas at room temperature) react to form large molecules of poly(ethene), which form a solid at room temperature.
		We use the ethene that is formed when large hydrocarbons are cracked to make plastics.
	www.patana.ac.th /parents/curriculum/chemistry/units/LR1204.html (725 words)

	Is Ambient Ethene a Cancer Risk Factor? (Site not responding. Last check: )
		Ethene is, on a molar basis, a major urban air pollutant.
		To the extent that the linearity hypothesis for dose-response relationships at low levels is accepted, exposure to ethene is therefore expected to lead to a risk increment.
		In order to judge whether ethene as a single compound should be considered a risk factor, it has to be evaluated whether this risk increment is negligibly small or of concern to individuals or societies.
	www.ehponline.org /docs/1994/Suppl-4/tornqvist.html (377 words)

	Ethene - MOTM 2006
		Ethene has been employed as an anaesthetic, though it is not used nowadays, since it is flammable and also causes cardiac arrhythmogenicity.
		The double bond in ethene, which makes that part of the molecule electron-rich, causes it to be more reactive than an alkane.
		The explosive nature of mixtures of ethene with air was one reason for the use of ethene as an anaesthetic being discontinued.
	www.chm.bris.ac.uk /motm/ethene/etheneh.htm (1264 words)

	Water Science & Technology 43:5 (2001) 333-340 - DL Freedman et al. - Substrate interactions during aerobic ...
		Significant levels of methane and ethene were also generated in the anaerobic zone.
		In this study microcosms were used to evaluate the role of methane and ethene as primary substrates for aerobic biodegradation of VC.
		Methane inhibited ethene metabolism, which apparently caused a reduction in VC biodegradation when methane was present with ethene.
	www.iwaponline.com /wst/04305/wst043050333.htm (422 words)

	ETHENE (Site not responding. Last check: )
		Ethene consists of two atoms of carbon and four atoms of hydrogen.
		All plant tissues manufacture ethene as a growth regulator.
		Ethene interferes with the functioning of membranes of nerve cells so vapours induce anaesthesia.
	www.neath-porttalbot.gov.uk /html/environment/pollution/on-line/species/ethe.html (94 words)

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