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Topic: Aromatic compound

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Aromatic ring

Aromaticity

Organic compound

Aliphatic

Hydrocarbon

Organic chemistry

Chemical compound

Structural formula

Benzene

Dutch standards

Aliphatic hydrocarbon

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List of organic compounds

Carboxylic acid

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	AllRefer.com - aromatic compound (Organic Chemistry) - Encyclopedia
		aromatic compound, any of a large class of compounds that includes benzene and compounds that resemble benzene in certain of their chemical properties.
		For this reason, the bonds in the aromatic ring are less reactive than ordinary double bonds; aromatic compounds tend to undergo ionic substitution (e.g., replacement of a hydrogen bonded to the ring with some other group) rather than addition (which would involve breaking one of the resonant bonds in the ring).
		Presence of the six-membered benzene ring is not essential for aromatic compounds; for example, furan, a heterocyclic compound that has a five-membered ring that includes an oxygen atom, has aromatic properties, as does pyridine, a heterocyclic compound whose six-membered ring includes a nitrogen atom.
	reference.allrefer.com /encyclopedia/A/aromatic.html (384 words)

	United States Patent Application: 0040092776
		In the process of the present invention, a polyalkyl-substituted aromatic aldehyde is produced by the formylation of a corresponding polyalkyl-substituted aromatic compound with carbon monoxide in the presence of hydrogen fluoride/boron trifluoride catalyst.
		However, if the alkyl-substituted aromatic compound has, as in the case of mesitylene or isodurene, alkyl groups on both the carbon atoms adjacent to the site to be formylated, the formylation reaction thereof is extremely slow as compared with the formylation of other alkyl-substituted aromatic compounds.
		Hydrogen fluoride in excess of the starting polyalkyl-substituted aromatic compound participates in the formation of the 1:1:1 (by mol) complex by solvating the complex, thereby enhancing the steric hindrance of the alkyl groups on both the carbon atoms adjacent to the site to be formylated to reduce the rate of formylation.
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040092776".PGNR.&OS=DN/20040092776&RS=DN/20040092776 (2222 words)

	United States Patent Application: 0040096780
		A resist pattern thickening material according to claim 9, wherein the water-soluble aromatic compound is at least one of a polyphenol compound, an aromatic carboxylic acid compound, a naphthalene polyhydroxy compound, a benzophenone compound, a flavonoid compound, a derivative thereof, and a glycoside thereof.
		A resist pattern thickening material according to claim 14, wherein the resin containing an aromatic compound in a portion thereof is at least one of a polyvinyl aryl acetal resin, a polyvinyl aryl ether resin, and a polyvinyl aryl ester resin.
		Suitable examples include monocyclic aromatic compounds such as benzene derivatives, pyridine derivatives, and the like, and compounds in which a plurality of aromatic rings are connected (polycyclic aromatic compounds such as naphthalene, anthracene, and the like), and the like.
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040096780".PGNR.&OS=DN/20040096780&RS=DN/20040096780 (10982 words)

	Aromatic amines from alkali metal amide aminating agent and aromatic - Patent 4501922
		Commercially, aromatic amines are generally produced by the mixed phase nitration of the aromatic compound to form the intermedicate nitroaromatic followed by the reduction of the nitro group to the amine.
		The direct amination is carried out by reacting a mononuclear aromatic compound with an alkali metal amide in the presence of a metallic hydrogenation catalyst, the catalyst being present in an amount sufficient effective for catalyzing the reaction under the conditions utilized.
		The mononuclear aromatic compounds which are directly reactable with alkali metal amide in the presence of a catalyst, are those which contain a single benzene ring or those substituted with a lower alkyl group, e.g.
	www.freepatentsonline.com /4501922.html (2143 words)

	aromatic compound
		Compounds whose molecules contain the benzene ring, or variations of it, are called aromatic.
		Organic chemical compound in which some of the bonding electrons are delocalized (shared among several atoms within the molecule and not localized in the vicinity of the atoms involved in bonding).
		The commonest aromatic compounds have ring structures, the atoms comprising the ring being either all carbon or mostly carbon with one or more different atoms (usually nitrogen, sulphur, or oxygen).
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0031699.html (166 words)

	Photosensitive composition of aromatic azido compound - Patent 4148655
		The aromatic azido compounds to be contained in the photosensitive composition of the present invention are not restricted to a special group, as long as the azido compounds have a (--N.sub.3) moiety and can be utilized as a photosensitive component of the conventional photosensitive compositions.
		The content of the aromatic azido compound in the photosensitive composition of the present invention may be adjusted to a desired value in response to the use of the photosensitive composition.
		The photosensitive compound is dissolved in a proper organic solvent, for example, an ethyleneglycol ether, ethyleneglycol acetate, cyclohexanone, carbitol, dioxane, butyl acetate or an aliphatic lower alcohol, to prepare a solution having, preferably, a concentration of from 1 to 30% by weight.
	www.freepatentsonline.com /4148655.html (2941 words)

	Dorlands Medical Dictionary
		clathrate compound, a type of inclusion complex in which molecules of one type are trapped within cavities of another substance, such as within a crystalline lattice structure or large molecule; called also occlusion c and clathrate.
		high energy compounds, compounds containing high energy bonds (q.v.); because they yield high levels of free energy on hydrolysis, the compounds are basic to the energy supply of living organisms.
		unsaturated compound, a compound in which the combining capacities of all the elements are not satisfied; see unsaturated.
	www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_c_50zPzhtm (2758 words)

	Aromatic Compound (Site not responding. Last check: 2007-11-07)
		In chemistry, an aromatic molecule is one in which electrons are free to cycle around circulararrangements of atoms, which are alternately singly and doubly bonded to one another.
		Aromaticity was discovered by Kekulé in benzene, and was first explained in quantum mechanical terms by Linus Pauling in the 1930s.
		A compound is an area of land that is surrounded by fences, walls, or barbed wire and is used for a particular purpose, especially an area containing buildings and where the entryand exit of people is controlled.
	www.bodawg.com /point/18037-aromatic-compound.html (550 words)

	The MSDS HyperGlossary: Aromatic
		A prototypical aromatic compound is benzene, so a layperson might prefer to think of an aromatic compound as something that has a ring structure like that of benzene, C
		Likewise, not all aromatic molecules have an odor.
		When the term aromatic is used in an MSDS it is referring to the chemical definition of aromaticity, not the smell or odor of the compound.
	www.ilpi.com /msds/ref/aromatic.html (676 words)

	What does "aromatic" really mean?
		That is, one key feature of aromatic compounds is that there is a set of electrons in a loop orbital resulting from overlapping p orbitals around a ring.
		Yes, it is. A manifestation of this is that the parent compound, cyclopentadiene, is a rather "strong" acid -- by the standards of H attached to hydrocarbons.
		Aromatic compounds are more stable than we might expect when we see a structure showing single and double bonds.
	www.geocities.com /Athens/Thebes/5118/obc/arom.htm (1841 words)

	Aromatic compound: Definition and Links by Encyclopedian.com - All about Aromatic compound (Site not responding. Last check: 2007-11-07)
		Aromatic compounds are compounds containing a planar set of atoms that are (in the classical sense) connected by single and double bonds alternating in a system of one or more closed rings.
		In modern terminology, they can be described as compounds in which a continuous, closed system of rings contains separate sets of sigma and pi electrons.
		The Hückel "4n+2" rule can be used to predict when aromatic behavior exists.
	www.encyclopedian.com /ar/Aromatic-compound.html (147 words)

	Aromatic compound conversion - Patent 4626609
		A process is provided for converting feedstock comprising aromatic compounds over a catalyst composition prepared by compositing a high silica zeolite with binder followed by treating the composite under conditions effective to enhance the activity of the composition.
		Feedstock aromatic compounds converted hereby include individually and in mixture benzene and monocyclic alkyl-substituted benzene of from 7 to 10 carbon atoms having the structure ##STR1## wherein R is methyl, ethyl or a combination thereof, and n is an integer of from 1 to 4.
		Disproportionation is a special case of transalkylation in which the alkylatable aromatic compound and the transalkylating agent is the same compound, for example, when toluene serves as the doner and acceptor of the transferred methyl group to produce benzene and xylene.
	www.freepatentsonline.com /4626609.html (4899 words)

	General Chemistry Online: Glossary:
		This represents a compound, and not a mixture, because there is a definite 1:7 ratio of zinc sulfate to water in the compound.
		An alcohol is an organic compound with a carbon bound to a hydroxyl
		Compounds containing the azo compounds are often intensely colored and are economically important as dyes.
	antoine.frostburg.edu /chem/senese/101/glossary/a.shtml (3120 words)

	Copley.94
		Halogenated aromatic compounds are generally resistant to biodegradation because halogen substituents on the aromatic rings interfere with the normal mechanisms for degradation of aromatic compounds.
		In one strategy, halogen substituents are removed from the aromatic compound, leaving a non-halogenated aromatic compound that is relatively easily degraded.
		In the second strategy, the aromatic ring is oxidized to an aliphatic compound before the halogen is removed.
	www.colorado.edu /chemistry/directory.dir/faculty.dir/organic.dir/copley.dir/copleyres.html (533 words)

	aromatic compound on Encyclopedia.com (Site not responding. Last check: 2007-11-07)
		The general rule is that aromatic molecules have 4 n + 2 delocalized electrons (where n is an integral number).
		A ground-water tracer test with deuterated compounds for monitoring in situ biodegradation and retardation of aromatic hydrocarbons.
		Interactions of enantiomers of aromatic amino acids with highly sulfated cyclodextrins.
	www.encyclopedia.com /html/a1/aromatic.asp (521 words)

	Search Results for aromatic - Encyclopædia Britannica
		The aromatic compounds, produced in the catalytic reforming of naphtha, are major sources of petrochemical products.
		Benzene (C6H6), the simplest aromatic hydrocarbon, was first isolated in 1825 by the English chemist Michael Faraday from the oily residues left from illuminating gas.
		Once it became clear that the special stability of benzene and related compounds was associated with the cyclic nature of its conjugated system of double bonds, organic chemists attempted to...
	www.britannica.com /search?query=aromatic&submit=Find&source=MWTEXT (471 words)

	World Intellectual Property Organization (Site not responding. Last check: 2007-11-07)
		FOR NITROXYLS IN Field of the Invention The present invention is directed to the use of at least one nitroaromatic compound to enhance the solubility of at least one nitroxyl compound in aromatic hydrocarbon solvents.
		WO 98/14416 discloses that the polymerization of vinyl aromatic monomers such as styrene is inhibited by the addition of a composition of a stable hindered nitroxyl radical and an oxime compound.
		The aromatic hydrocarbon solvent that is employed in the practice of the present invention may be any liquid aromatic hydrocarbon in which the nitroaromatic compound (s) are soluble or miscible.
	www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=01/83567.011108&ELEMENT_SET=DECL (4967 words)

	World Intellectual Property Organization (Site not responding. Last check: 2007-11-07)
		compound selected from the group consisting of halide, triflate, and nonaflate in the presence of a catalytically effective amount of a metal catalyst wherein the aromatic group of the organic compound is coupled to the aromatic group of the aromatic boron compound to produce the organic substituted aryl or heteroaryl compound.
		(b) reacting the mixture of borylated aromatic compounds in the presence of a catalytically effective amount of a metal catalyst wherein the borylated aromatic compounds in the mixture are cross- coupled to produce the polyphenylene.
		The direct route to aromatic or heteroaromatic boronate esters and acids in the first step produces intermediates which are versatile transfer reagents in the second step of the process of the present invention.
	www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=03/06403.030123&ELEMENT_SET=DECL (5817 words)

	Spectroscopy Problems (Site not responding. Last check: 2007-11-07)
		The peaks in the aromatic region strongly suggest 1,4-disubstitution, and there is a peak at 117 which would be consistent with a nitrile carbon.
		The proton NMR also shows evidence for 1,4-disubstitution on an aromatic ring and an isolated methyl with a chemical shift which is consistent with direct attachment to the ring.
		The simplest structure which is consistent with all of these data would be an aromatic compound with a nitrile and a methyl group, 1,4 to each other on the ring.
	chipo.chem.uic.edu /web1/ocol/spec/P7.htm (470 words)

	C&EN: Latest News - Aromatic Silicon Ring Debuts
		The first stable all-silicon aromatic ring compound, the cyclotrisilenylium cation, has been synthesized by a group in Japan after years of theoretical speculation and failed attempts.
		Three-membered saturated rings of silicon, germanium, and tin have been known since the 1980s, and these compounds have been reduced to form cyclopropene analogs that could be transformed into aromatic rings.
		Aromatic cyclotrisilenylium cation is stabilized by bulky tri-tert-butylsilyl groups (Si = red, C = gray, H = white).
	pubs.acs.org /cen/news/83/i28/8328notw7.html (337 words)

	Solid state electrochemical cell containing a proton-donating aromatic compound - US Patent 5382481 (Site not responding. Last check: 2007-11-07)
		The application of hydroquinone and other similar hydroxy-containing aromatic groups and methylene blue and other similar proton-donating aromatic compounds in electrochemical reactions using a solid electrolyte as the proton-conducting medium, and especially in solid state battery applications, are not known in the prior art.
		It is to be understood that the aforementioned listing of aromatic organic compounds for the solid state anode is only representative of the class of hydrogen ion sources which are contemplated for use as the active aromatic organic material in the anode of the present invention.
		Any solid substances capable of acting as a source of protons in an electrochemical reaction at the anode of a battery power source for conversion of chemical energy to electrical energy may be used as the active component for the anode in such a battery.
	www.patentstorm.us /patents/5382481.html (4254 words)

	Information on Aromatic compound
		[1913 Webster] Aromatic compound (Chem.), one of a large class of organic substances, as the oils of bitter almonds, wintergreen, and turpentine, the balsams, camphors, etc., many of which have an aromatic odor.
		They include many of the most important of the carbon compounds and may all be derived from the benzene group, C6H6.
		aromatic compound n : a hydrocarbon containing one or more benzene rings that are characteristic of the benzene series of compounds
	www.wkonline.com /d/Aromatic_compound.html (131 words)

	Chemicals (Site not responding. Last check: 2007-11-07)
		Most of these chemicals are from organic compounds, meaning that they were once produced from something that had been alive in the past and which contain a carbon atom.
		The simplest aliphatic compound is the one carbon compound formalin or formaldehyde.
		It is not necessary to test all of the aliphatic compounds or all of the aromatic compounds one encounter to find a level to neutralize to the different aliphatic or aromatic compounds.
	entgadsden.com /chemicals.htm (239 words)

	NMR Spectroscopy (Site not responding. Last check: 2007-11-07)
		C NMR, infrared and mass spectra for this compound are available by clicking on the buttons below; use the "Return" button to return to this screen.
		The proton NMR also shows evidence for an aldehyde CH and the complex splitting pattern in the aromatic region is consistent with 1,2 or 1,3-disubstitution on an aromatic ring.
		The simplest structure which is consistent with all of these data would be a 1,2 or 1,3-disubstitution aromatic compound bearing bromine and aldehyde residues.
	chipo.chem.uic.edu /web1/OCOL-II/WIN/SPEC/PROBLEMS/PROB10.HTM (259 words)

	Process for preparing benzylnitriles - US Patent 6303782 (Site not responding. Last check: 2007-11-07)
		The present invention relates to a novel process for preparing an aromatic compound substituted by a tertiary nitrile which is applicable to the preparation of a wide variety of compounds of this type.
		Preferred tertiary-nitrile-substituted aromatic compound final products prepared in accordance with the process of the present invention are those which are useful as therapeutic agents, especially inhibitors of phosphodiesterase type IV (PDE4).
		The choice of the temperature at which the reaction mixture containing the tertiary nitrile and substituted aromatic compound is to be maintained in accordance with the process of the present invention, is of less critical importance than the choice of the above-mentioned base and solvent system.
	www.patentstorm.us /patents/6303782.html (6736 words)

	Composition of a polyphenylene ether and a block copolymer of a vinyl aromatic compound and a conjugated diene - United ...
		The compositions taught by Lauchlan have a polyphenylene ether-alkenyl aromatic resin matrix that constitutes greater than 50% of the blend, with a proviso that the ratio of polyphenylene ether resin to alkenyl aromatic resin is always greater than 1.
		With respect to component (b), elastomeric block copolymers of vinyl aromatic compounds and conjugated dienes are made by means well known in the art and are also available commercially from a number of sources.
		Block copolymers of vinyl aromatic compounds and conjugated dienes are described in Kennedy, et al Editor, Polymer Chemistry of Synthetic Elastomers, Interscience, Vol.
	xrint.com /patents/us/3994856 (3828 words)

	Naming aromatic compounds
		An aromatic compound is one which contains a benzene ring.
		As with chain compounds, you number the ring so that the name you end up with has the smallest possible numbers in it.
		For example, if you had the exactly equivalent compounds containing nitro groups in place of the chlorines, the names would change completely, to 1-methyl-2-nitrobenzene, 1-methyl-3-nitrobenzene, etc. In this case, the normal practice of naming the hydrocarbon first, and then attaching other things to it has been completely wrecked.
	www.chemguide.co.uk /basicorg/conventions/names3.html (1338 words)

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