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Topic: Alkyl

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In the News (Thu 25 Apr 19)

  Alkyl - Wikipedia, the free encyclopedia
The structure of an alkyl is the same as its straight chained alkane counterpart but with one less hydrogen atom.
Alkyls are radicals since only three out of four valency electrons are used in bonding on one of the carbon atoms.
Alkyl groups are included in the name of the molecule before the root, as in methylpentane.
en.wikipedia.org /wiki/Alkyl   (531 words)

 Alkyl Halides Gen   (Site not responding. Last check: 2007-11-06)
The electrophilic carbon atom of the alkyl halide is reactive with nucleophiles in the nucleophilic substitution reaction.
For alkyl halides, the leaving group is the halide ion, for alcohols the leaving group is water or another activated oxoium ion, and for tosylates the leaving group is the tosyl ion.
For alkyl halides, the leaving group is the halide ion, for alcohols the leaving group is an activated oxoium ion, and for tosylates the leaving group is the tosyl ion.
acpcommunity.acp.edu /Facultystaff/brownewf/FEB_Web/Organic/Lab/Experiments/AlkylHalides/Alkyl_Halides_Gen.html   (2430 words)

 Alkyl Halides   (Site not responding. Last check: 2007-11-06)
where the R in the general form is typically an alkyl group with a halogen replacing one of the hydrogens.
The simplest common alkyl halides are chloroform and carbon tetrachloride.
An important class of alkyl halides are the chlorofluorocarbons (CFCs) which have been used in air conditioners, etc., as refrigerants.
hyperphysics.phy-astr.gsu.edu /hbase/organic/alkhal.html   (314 words)

 Alkyl nitrites - Wikipedia, the free encyclopedia
This article is about alkyl nitrites as a laboratory reagent.
For their use in medicine and as a recreational drug, see nitrite inhalants.
Formally they are alkyl esters of nitrous acid.
en.wikipedia.org /wiki/Alkyl_nitrites   (122 words)

 Alkyl Halide Reactivity
The functional group of alkyl halides is a carbon-halogen bond, the common halogens being fluorine, chlorine, bromine and iodine.
Alkyl halides in which the alpha-carbon is a chiral center provide additional information about these nucleophilic substitution reactions.
With the exception of methyl and benzyl, the other alkyl groups present a steric hindrance to the back-side approach of the nucleophile, which increases with substitution alpha and beta to the bromine.
www.cem.msu.edu /~reusch/VirtTxtJml/alhalrx1.htm   (2568 words)

 Alkyl Halides
Next in our cavalcade of organic compounds is a class of compounds which have single bonds and which contain the elements carbon, hydrogen, and any of the halogens (chlorine, bromine, iodine, and fluorine).
The alkyl represents one of the alkyl groups which is bonded to a halogen and the halide represents the halogen.
The functional group for an alkyl halide is the halogen atom.
dl.clackamas.cc.or.us /ch106-01/alkyl.htm   (127 words)

 alkyl group on Encyclopedia.com   (Site not responding. Last check: 2007-11-06)
ALKYL GROUP [alkyl group], in chemistry, group of carbon and hydrogen atoms derived from an alkane molecule by removing one hydrogen atom (see radical).
The influence of alkyl end-groups on the miscibility of hyperbranched polymers with polyolefins.(Abstract)
The effect of composition on thermal, mechanical, and morphological properties of thermotropic liquid crystalline polyester with alkyl side-group and polycarbonate blends.
www.encyclopedia.com /html/a1/alkylgro.asp   (341 words)

 Alkyl Halide Reactivity
If the intermediate from a chiral alkyl halide survives long enough to encounter a random environment, the products are expected to be racemic (a 50:50 mixture of enantiomers).
Heterolytic cleavage of the carbon-halogen bond of alkyl halides may be facilitated by the presence of certain metal cations.
For many combinations of alkyl halides and nucleophiles, elimination reactions may compete with substitution, or even be the predominant reaction path.
www.cem.msu.edu /~reusch/VirtualText/alhalrx2.htm   (1186 words)

Organo (alkyl) mercury compounds may cause damage to the central nervous system and are irritants of the eyes, respiratory tract, and skin.
The alkyl mercury halides are irritating to the eyes, upper respiratory tract, and skin and may cause severe skin rash and burns.
The alkyl mercury halides are irritating to the eyes, mucous membranes, and skin and may cause severe dermatitis and burns; skin sensitization has occasionally occurred.
hgtech.com /HSE/dimethylmercury.htm   (2731 words)

 Basic facts about poppers and liquid aromas, facts about alkyl nitrites
5) Alkyl nitrites are aliphatic esters of nitric acid.
The blood pressure is said to continue to fall for about thirty seconds and to return to normal after approximately a minute and a half.
Alkyl nitrites are also extremlely flammable and will greatly damage human skin.
www.liquidaromas.com /basicfacts.html   (742 words)

 - AE (Alkyl Ethoxylate) ELISA test kit - Biosense Laboratories
The Alkyl Ethoxylate (AE) ELISA test kit specifically detects AEs with alkyl chain length C10-C12 and does not cross-react with other surfactants, except weakly with some anionic surfactants with sulfate.
The analysis is based on a competitive reaction where enzyme-labelled standard AE competes with free AE in the sample for binding to a specific monoclonal antibody immobilised to the surface of the microtiter plate.
The Alkyl Ethoxylate (AE) ELISA test kit is suitable for applicatons such as analyses of waste and river water, textiles, detergent formulas and optimization of washing processes.
www.biosense.com /comweb.asp?articleno=34&segment=3   (202 words)

 Alkyl Groups
If you have any questions about how many hydrogen atoms there should be and where they should go, be sure to check with the instructor when you are in the lab.
There are other alkyl groups and their names are similarly based on the names of corresponding alkane molecules.
There are times when it is necessary to indicate the presence of an alkyl group without having to specify exactly what it is. In these cases, a capital R- is used to represent that unspecified alkyl group.
dl.clackamas.cc.or.us /ch106-01/alkyl1.htm   (541 words)

 Alkyl-1,3-propylene diamine adipate, alkyl derived from coconut oil fatty acids - toxicity, ecologicial toxicity and ...
Sorry, no water quality standards or criteria have been established for this chemical by the U.S. or Canadian governments; however, there may be criteria established for related chemicals.
Ecotoxicity for Alkyl-1,3-propylene diamine adipate, alkyl derived from coconut oil fatty acids
Information for many chemicals is incomplete and may not be fully representative of effects on the environment.
www.pesticideinfo.org /Detail_Chemical.jsp?Rec_Id=PC33898   (885 words)

 Synthesis of Primary Alkyl Bromides
Halogen exchange reactions between alkyl halides and metal salts (Finkelstein reaction)[1,2,3] have found only limited synthetic applications in the few examples where the equilibrium could be shifted in the desired direction.
A new approach to the Finkelstein reaction was recently introduced independently by several groups [6-9] who utilized phase transfer catalysts to accelerate halogen exchange between metal salts in aqueous solutions and alkyl halides in organic phase.
It was shown that chloride, bromide, and iodide as their sodium or potassium salts can be efficiently exchanged with various alkyl chlorides or bromides.
www.erowid.org /archive/rhodium/chemistry/chloride2bromide.html   (586 words)

 The Organometallic HyperTextBook: Metal Alkyl Complexes
Transition metal alkyl complexes play a critical role in a variety of important organometallic reactions such as olefin polymerization and hydroformylation.
Simple alkyls are simple sigma donors, that can be considered to donate one or two electrons to the metal center depending on which electron counting formalism you use.
Another type of unusual alkyl group involves agostic interactions in which part of the alkyl substituent coordinates to the metal in addition to the M-C bond.
www.ilpi.com /organomet/alkyl.html   (949 words)

 M6. Thermal Decomposition and Isomerization Processes of Alkyl and Allyl Radicals
The thermal decomposition process of alkyl radicals plays an important role in the high-temperature combustion of alkanes.
For long-chain alkyl radicals, the isomerization process is also important since the isomerized radicals give different products, but no direct investigation on this process has been reported.
Isomeric alkyl radicals were generated by the thermal decomposition of respective alkyl iodides.
www.cstl.nist.gov /div838/kinet_conf/agenda/m_session/m6/m6.html   (582 words)

Essentially, the naming of alkyl halides is not different from the naming of alkanes.
The carbon-fluorine bond is the strongest, especially since fluorine is the most electronegative of the halogens, resulting in a larger contribution of the polar (ionic) structure to the resonance hybrid.
It has already been established that tertiary alkyl radicals are more stable than secondary than primary than methyl, so as the R group (alkyl) is varied from tertiary to secondary to primary, the TS becomes less stable, the activation energy higher, and the rate lower.
research.cm.utexas.edu /nbauld/teach/halides.html   (2474 words)

 Chapter 7 Notes
the densities of liquid alkyl halides are greater than those of hydrocarbons of comparable molecular weight
for simple alkyl radicals, the carbon bearing the radical is sp2 hybridized
Grignard reagents are formed by reaction of an alkyl halide
chem.pdx.edu /~wamserc/C334F99/7notes.htm   (1049 words)

 (WO/2001/098269) N-UREIDOALKYL-PIPERIDINES AS MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY   (Site not responding. Last check: 2007-11-06)
wherein R6 and R7 may be phenyl further substituted with hydroxy, alkyl, cyano, halo and haloalkyl.
Compounds of this type are claimed to promote the release of growth hormone in humans and animals.
at each occurrence, is selected from H, alkyl, and C3-6 cycloalkyl ; v is selected from 1 and 2; q is selected from 1,2, and 3; and r is selected from 0,1,2, and 3.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/98269.011227&ELEMENT_SET=DECL   (2760 words)

 Indole derivatives having a 2-phenyl-ethanolamino-substituted lower alkyl group at the 2-or 3-position thereof ...
is a lower alkyl group being optionally substituted by a hydroxy group, a phenylsulfonylamino group, a lower alkylsulfonylamino group, a mono- or di-lower alkylaminosulfonyl group, or a group selected from the following (a) to (d), or combines with R
is a hydrogen atom, a halogen atom, a lower alkyl group being optionally substituted by a hydroxy group, a hydroxy group, a lower alkoxy group, or a group of the above (b) or (c), or combines with R
is a lower alkyl group, or a salt thereof.
www.delphion.com /details?pn=US05817689__&language=en   (574 words)

 Alkyl Amines Chemicals Limited - Corporate Information
Alkyl Amines Chemicals Limited and the AACL logo are trademarks of Alkyl Amines Chemicals Limited.
All recommendations for handling, storage or use of products, whether given in writing, orally, or to be implied from the results of tests are based on the state of Alkyl Amines Chemicals' knowledge at the time such recommendations are made.
Alkyl Amines Chemicals Ltd. makes no representations whatsoever about any other web site which you may access through links from this one.
www.alkylamines.com /investors/legal/legal.htm   (306 words)

 Alkyl Halides
If the crystallizing dish in the upper-right corner is moved into the center of the projector, however, the color of the bromine slowly disappears.
This can be explained by noting that alkanes react with halogens at high temperatures or in the presence of light to form alkyl halides.
The light source in an overhead projector is intense enough to initiate this reaction, although the reaction is still significantly slower than the addition of Br to an alkene.
chemed.chem.purdue.edu /genchem/topicreview/bp/2organic/alkyl.html   (944 words)

 [No title]   (Site not responding. Last check: 2007-11-06)
is hydrogen, C1-8 alkyl, phenyl or C1-8 alkyl substituted with phenyl or
is hydrogen, C1-8 alkyl, phenyl or C1-4 alkyl substituted with 1-5 of phenyl, cyano or halogen,
is hydrogen, C1-8 alkyl, C1-4 alkyl substituted with 1-5 of phenyl, cyano or halogen,
www.uspto.gov /web/patents/patog/week10/OG/html/1304-1/US07008938-20060307.html   (1134 words)

 ORGANIC CHEMISTRY I - CHAPTER 10 LECTURE OUTLINE   (Site not responding. Last check: 2007-11-06)
Alkyl halides are used as solvents, anesthetics, refrigerants, pesticides, plasma etching agents, ……….
Treat alkyl halides the same as alkanes, treating the halogens like alkyl groups.
Reaction of alkyl halides with the Gilman Reagent
falcon.sbuniv.edu /~ggray/CHE3304/oc10outl.html   (234 words)

 Alkyl-1,3-propylene diamine acetate, alkyl derived from coconut oil fatty acids - toxicity, ecologicial toxicity and ...
Chemical Identification and Use for Alkyl-1,3-propylene diamine acetate, alkyl derived from coconut oil fatty acids
Alkyl-1,3-propylene diamine acetate, alkyl derived from coconut oil fatty acids
Ecotoxicity for Alkyl-1,3-propylene diamine acetate, alkyl derived from coconut oil fatty acids
www.pesticideinfo.org /Detail_Chemical.jsp?Rec_Id=PC33897   (826 words)

 Alkyl Sulfonates
History: Norquay's manufacture of High Purity alkyl sulfonates dates to 1987 with the supply of Catalog houses and select large volume end users.
Biological: N-alkyl sulfonates interact specifically with biologicals, especially proteins, by virtue of electrostatic interaction along the polar chain or because of their stereochemistry in solution.
The low alkyl chain sulfonates are strongly acidic, the acid strength decreasing with the growth of the alkyl chain length.
www.norquaytech.com /sulfonates.htm   (226 words)

 Chapter 4 : Alkyl Halides   (Site not responding. Last check: 2007-11-06)
In a similar fashion to alcohols, alkyl halides are described as primary (1
The polar bond creates a molecular dipole that raises the melting points and boiling points compared to alkanes.
The alkyl halide functional group consists of an sp
library.tedankara.k12.tr /carey/ch4-2.html   (130 words)

 FR Doc 05-18241
An alkyl polyglycoside is created by combining glucose and an alcohol.
The LOAEL (lowest observed adverse effect level) is 500 mg/kg/day based on acanthosis, subepithelial inflammatory edema, and hyperkeratosis (females only) of the forestomach, which did not resolve during the treatment period.
Other Non-Occupational Exposure Various alkyl polyglucosides are used in glass cleaners and other household cleaning products, as rinse aids in dish washers, and in cleaning products used by the food industry.
a257.g.akamaitech.net /7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/05-18241.htm   (3752 words)

 Amazon.com: Alkyl Polyglycosides: Technology, Properties and Applications: Books: K. Hill,W. Von Rybinski,G. Stoll   (Site not responding. Last check: 2007-11-06)
I own the rights to this title and would like to make it available again through Amazon.
Alkyl polyglycosides are a new generation of multi-application, ecologically safe nonionic surfactants that form a naturally reusable resource.
Written by pioneers in the field, this title details the technological, ecological, physicochemical and performance aspects of alkyl polyglycosides, and discusses the current patent situation of these new commercially viable materials.
www.amazon.com /exec/obidos/tg/detail/-/3527294511?v=glance   (351 words)

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