How To Use Carbonyl In A Sentence
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The most remarkable feature of Tebbe's reagent is a methylene group bridging between titanium and aluminum, which could replace the oxygen in a carbonyl group in a Wittig-like reaction.
Richard R. Schrock - Autobiography
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Aldol condensation reactions occur when the carbanion carbon of an enolate reacts with the carbonyl carbon of a ketone or aldehyde, forming a new carbon-carbon bond.
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An early project returned me to my interest in cyclobutadiene and we designed a mechanistic study to determine if cyclobutadiene was really formed from the decomposition of the Pettit iron tricarbonyl complexes.
Robert H. Grubbs - Autobiography
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These compounds can be prepared from reduction of nitro compounds, by the action of nitric acid on amines, from compounds containing the carbonyl group (azines), and from the salts of hydrazoic acid (azide).
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It is generally believed that non-enzymic browning involves an initial condensation of amino-acids with the active carbonyl group of reducing sugars (the Maillard reaction) or furfuraldehydes derived from sugars or sugar-acids.
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The processing of salting affected the TBARS value, carbonyl compounds while conjugated dienes significantly and the peroxide va...
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We investigated a role of the glyoxalase detoxification system of precursor reactive carbonyl compounds in the in vivo AGE formation.
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Urea (carbonyl diamide) is a fertilizer that is sometimes used to melt ice.
Courierpress.com Stories
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Other compounds detected in volcanic gases are oxygen (meteoric), hydrogen chloride, hydrogen fluoride, hydrogen bromide, nitrogen oxide (NOx), sulfur hexafluoride, carbonyl sulfide, and organic compounds.
The BBC and global warming
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Aldol condensation reactions occur when the carbanion carbon of an enolate reacts with the carbonyl carbon of a ketone or aldehyde, forming a new carbon-carbon bond.
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Sulfamidyl (thio) carbonyl-1,2,4-triazolineone derivative and preparation method and application as weed killer.
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The first contact is the mainchain-mainchain hydrogen bonding between the carbonyl oxygen of lysine at position 2 and the amide proton of E. For convenience, we termed the internuclear distance responsible for this contact, d1.
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In this process carbonyl compounds form hydrates which have different properties from those of the parent (unhydrated chemical + water=hydrated chemical).
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The reagent is first reacted with borane (BH3) which can then reduce a carbonyl group to an alcohol.
The Nobel Prize in Chemistry 1990
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In the case of aldehydes and ketones containing carbonyl groups, the highly nucleophilic Grignard reagent contributes its electron pair to form a bond with the carbon atom.
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It is a good idea to coat all wood and bamboo roof materials with an anti-termite solution-such as carbonyl, Xylophene, or Creosote.
Chapter 6
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That falls apart on workup to two carbonyl compounds (or other things, depending on what you add to the reaction.)
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On the other hand, the weak site has a quadrangular pyramidal structure with three peptide carbonyl groups and two water molecules.
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The tests did not detect the presence or found only very limited or occasional indications of sulfur compounds of particular interest — hydrogen sulfide, carbon disulfide, and carbonyl sulfide.
Long anticipated Chinese drywall report short on answers
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During the study, UV light released gamma aminobutyric acid (GABA) from the "caged" compound carbonyl amino butanoic acid (BC204).
Medlogs - Recent stories
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It would probably also be to your benefit to look up some of the simple molecules found in astrochemistry, and of the interesting condensation reactions that some simple carbonyl compounds spontaneously undergo to give surprisingly complex molecules, sometimes with high diastereoselectivities even in the absence of chiral input.
Ten Questions to Ask Your Biology Teacher - The Panda's Thumb
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Oxidation of an aldehyde breaks the double bond within the carbonyl group to give a carboxylic acid.
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The entire process simulation - alcohol dehydrogenation, carbonyl polishing and distillation - was operated continuously for eight weeks.
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AAP motifs moderate the steric clash between the pyrrolidine ring and the O = C i - 4 carbonyl oxygen.
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It is important to distinguish these organic compounds from the organometallic group known as the metal carbonyls.
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T.sting found that carbon disulfide and carbonyl sulfide are being emitted by some of its drywall, but not at levels that would damage health, says Phillip T. Goad, principal toxicologist and partner at the Center for T.xicology and Environmental Health in North Little Rock, Ark. T.e center is a private company hired by Knauf T.anjin that consults and does testing for corporations and government agencies.
The Prisoners of Drywall
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The tests did not detect the presence or found only very limited or occasional indications of sulfur compounds of particular interest—hydrogen sulfide, carbon disulfide, and carbonyl sulfide.
Long anticipated Chinese drywall report short on answers
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The processing of salting affected the TBARS value, carbonyl compounds while conjugated dienes significantly and the peroxide va...
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The dotted red lines are hydrogen bonds between amide and carbonyl groups in the peptide bonds.
Pauling's Alpha-helix
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The trigonal planar arrangement of the groups around the carbonyl carbon atom enables the carbon atom to be relatively open to attack from above, or below.
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The results showed that during the chemical pretreatment the guaiacyl unit was more readily to be sulfonated and dissolved, and there were new conjugated carbonyl and quinoid structure formed.
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There are basically four kinds of "reactive organics" that are important in smog photochemistry: paraffins, olefins, aromatics, and carbonyl compounds aldehydes and ketones, the latter being more commonly formed in the smog process than emitted outright.
Hot Buttered
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Synthesis process of dimethyl carbonate is reviewed. Oxidative carbonylation of methanol to DMC and the possibilities of replacement of DMS and COCl_2 by DMC are discussed.
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The tests did not detect the presence or found only very limited or occasional indications of sulfur compounds of particular interest — hydrogen sulfide, carbon disulfide, and carbonyl sulfide.
Long anticipated Chinese drywall report short on answers
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This method represents a useful conversion of the carbonyl group to the amino group.
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Mesomeric effects are much better transmitted through bonds than the inductive effect; in the C 3 position, the effect of the the carbonyl mesomeric influence is still noticeable.
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This article is concerning the lightweight microwave absorbing coating containing carbonyl iron powder ( CIP ) .
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monometallic carbonyls
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Metal carbonyls are organometallic compounds where one or more of the metal ligands are carbon monoxide.
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Other compounds detected in volcanic gases are oxygen (meteoric), hydrogen chloride, hydrogen fluoride, hydrogen bromide, nitrogen oxide (NOx), sulfur hexafluoride, carbonyl sulfide, and organic compounds.
The BBC and global warming
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The vibrant frequency of carbonyl is concerned with the force - constant and convert - mass of the carbonyl.
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This reaction is not merely of academic interest - F2 Chemicals in Preston has now scaled up the fluorination of various b dicarbonyl systems for manufacture.
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In simple additions, the carbonyl compounds can behave as both Lewis acids and Lewis bases depending on what reagents are present.
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Protonation of the carbonyl oxygen favors formation of the enolate
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Lectures on my fields, particularly those on metallic complexes of cyclopentadienes and indenes, metal-p-complexes of six-ringed aromatics, mono -, di - and oligo-olefins and most recently metalcarbonyl carbene and carbyne complexes, led me on lecture tours of the United States,
Ernst Otto Fischer - Autobiography
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However, after isomerization, the planarity is lost, presumably due to intermolecular effects as well as steric hindrance between the carbonyl oxygen and the aromatic ring atoms.
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Oxidation of primary alcohols to carboxylic acids Alcohols possessing two hydroxy groups located on adjacent carbons - that is, 1,2-diols - suffer oxidative breakage at a carbon-carbon bond with some oxidants such as sodium periodate (NaIO4) or lead tetraacetate (Pb (OAc) 4), resulting in generation of two carbonyl groups.
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In this study, the levels of reactive carbonyl compounds in commercial carbonated soft drinks were found to be astonishingly high.
High-fructose corn syrup fights back | The Blog of Michael R. Eades, M.D.
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However, for L-amino acids such as Asp or Asn, interactions between the side-chain carbonyl group with the carbonyl of the main-chain peptide bond can give rise to relative stabilisation of a conformation with a positive φ angle Box plots for the substitution scores by the class of secondary structure.
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Enols are less stable than carbonyls, and standard combustion mechanisms assume that they do not play a role.
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In particular, he covers fluxional organic molecules, fluxional metal carbonyls, the discovery of agostic hydrogens, arene complexes of lanthanides and actinides, and ï ½ 2, h, h-C 2 H 4 complexes.
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FTIR results indicate that terbium ions coordinated with the carbonyl groups in polyurethane molecular chains.
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The culinary exploits were pursued further with the progress to open sandwiches, having a flat molecule on one side of the metal atom, and with only small molecules such as carbonyl, methyl or ethyl groups on the other side.
The Nobel Prize in Chemistry 1973 - Presentation Speech
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Most sunscreens are aromatic compounds conjugated with a carbonyl group with an electron-releasing amine or methoxyl group substituted in the ortho - or para - position.
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The carbonyl group can be broken down by the action of hydrogen cyanide; a hydroxyl group and a nitrile group are formed in this reaction.
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The understanding of many important chemistries is being advanced by the use of ReactIR ™ because it provides detailed information about key reactive species and their concentrations under a range of challenging environments including organometallic, polymer, hydroformylation, carbonylation and hydrogenation chemistries, among others.
PRWeb - Daily News Feed
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It is possible that enols exist in flames as a consequence of interconversion with carbonyls at equilibrium.
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Low molecular weight aldehydes and ketones are soluble in water because the carbonyl oxygen atom allows the molecules to form strong hydrogen bonds with the molecules of water.
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Metal carbonyls have high oscillator strength, large absorption coefficients, and strong electronic resonance in the visible and ultraviolet regimes, making them excellent spectroscopic probes.
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Two decades later, a particularly interesting group of compounds made from carbon monoxide - the carbonyls - were discovered by the French chemist Paul Sabatier.
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The vibrant frequency of carbonyl is concerned with the force - constant and convert - mass of the carbonyl.
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The surface lipids undergo oxidation, generating many compounds containing hydroxyl and carbonyl groups.
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The reaction of Grignard reagents with carbonyl compounds is used to prepare primary, secondary, and tertiary alcohols.
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Synthesis of methyl formate (MF) by carbonylation of methanol with only sodium methoxide as catalyst exists some shortages, such as low activity, rapid loss of activity and short catalyst life.
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It includes the glycerol and carbonyl groups and the hydrocarbon chains of the lipid.
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As a result, carbonyl compounds can form carbon anions (carbanions) and act as nucleophiles rather than electrophiles.
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The carboxyl group can also be converted into an alcohol by reduction of the carbonyl carbon.
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The carboxylic acid group of the drug is first reacted with an activated carbonyl group like that found on isobutyl chloroformate.
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When a base removes one proton from either of the non-carbonyl carbons of acetone, a carbanion is produced in which one of the carbon has a negative charge.
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Perhaps the richest and certainly the most extensively studied cluster compounds are the carbonyl complexes.
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That leaves the oxygen with a very friendly bond dangling, and it likes to hook up with its nearby carbon buddy, to form what is called the carbonyl bond.
Alcohol
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In the proposed mechanism for the early stage of 10-membered enediyne biosynthesis, CalE8 produces a carbonyl-conjugated polyene with the assistance of
Journal of Biological Chemistry current issue
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It is known that metal cations form complexes with anionic phosphodiester groups and carbonyl oxygens in the glycerol backbone of phosphocholine lipids.
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It is formed from the reaction of nitric oxide with superoxide, and produces carbonyls on proteins.
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Several major forms of oxidative modifications can occur on amino acid residue side chains, including carbonylation, nitrosylation, and oxidation of methionine to methionine sulfoxide
PLoS ONE Alerts: New Articles
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For example, Hoveyda explains, olefin metathesis can be difficult to use on compounds that contain sterically hindered alkenes and certain functional groups, such as amines and carbonyls.
Chemical & Engineering News: Latest News
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This structure has a resonance form, an enolate ion, in which a double bond is formed between this negative carbon and the carbonyl carbon, the C-O bond becomes a single bond, and the negative charge is placed on the oxygen atom.
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MLn fragments, has been used by my research group to analyze cluster bonding and the equilibrium geometries and conformational preferences of olefin and polyene metal carbonyl complexes.
Roald Hoffmann - Autobiography
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The reagent is first reacted with borane (BH3) which can then reduce a carbonyl group to an alcohol.
The Nobel Prize in Chemistry 1990