The carbonyl group

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  • (BQ) Part 2 book "Study guide and solutions manual to accompany organic chemistry" presents the following contents: Reactions of aromatic compounds, aldehydes and ketones; nucleophilic addition to the carbonyl group, condensation and conjugate addition reactions of carbonyl compounds-more chemistry of enolates; condensation and conjugate addition reactions of carbonyl compounds-more chemistry of enolates;...

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  • Both infrared and Raman spectroscopy are extremely powerful analytical techniques for both qualitative and quantitative analysis. However, neither technique should be used in isolation, since other analytical methods may yield important complementary and/or confirmatory information regarding the sample. Even simple chemical tests and elemental analysis should not be overlooked and techniques such as chromatography, thermal analysis, nuclear magnetic resonance, atomic absorption spectroscopy, mass spectroscopy, ultraviolet and visible spectroscopy, etc.

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  • The Chemistry of Organic Derivatives of Gold and Silver. Edited by Saul Patai and Zvi Rappoport Copyright  1999 John Wiley & Sons, Ltd. ISBN: 0-471-98164-8 The chemistry of organic derivatives of gold and silver .

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  • Chapter 22 - Condensations and alpha substitutions of carbonyl compounds. In this chapter, we consider two more types of reactions: substitution at the carbon atom next to the carbonyl group (called alpha substitution) and carbonyl condensations. Carbonyl condensations are among the most common biological methods for building up and breaking down large molecules.

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  • The different roles of ubiquinone-10 (UQ10) at the primary and secondary quinone (QAand QB) binding sites ofRho-dobacter sphaeroidesR26 reaction centres are governed by the protein microenvironment. The 4C¼O carbonyl group of QAis unusually strongly hydrogen-bonded, in contrast to QB. This asymmetric binding seems to determine their dif-ferent functions. The asymmetric hydrogen-bonding at QA can be caused intrinsically by distortion of the methoxy groups or extrinsically by binding to specific amino-acid side groups. ...

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  • In organic chemistry, a carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom: C=O. It is common to several classes of organic compounds, as part of many larger functional groups. The term carbonyl can also refer to carbon monoxide as a ligand in an inorganic or organometallic complex. Other organic carbonyls are urea and the carbamates, the derivatives of acyl chlorides chloroformates and phosgene, carbonate esters, thioesters, lactones, lactams, hydroxamates, and isocyanates.

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  • After attending lectures, reading the text and working assigned problems related to this chapter, students will have acquired the following knowledge and abilities: Know the origin of the unusual acidity of H α atoms located between two carbonyl groups, know the relative acidity of H α in aldehydes, ketones, esters, and 1,3-dicarbonyls; given starting material and reaction conditions, predict the major product that will form;...

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  • Rigorously speaking the functional group is not the whole molecule but only that collection of atoms that provides a specific chemical function. For example, the chemical family of alcohols is characterized by the function of the hydroxyl (OH) group, and aldehydes, ketones are characterized by carbonyl groups (C=O). There are various combinations of hydroxyl groups in molecules along with carbonyl groups and these combinations can lead to hydroxyketones and aldehydes (the basis for sugars) as well as to carboxylic acids.

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  • From the 3-acetyl- and 3-trifluoroacetylaminoindan-1-ones obtained during the course of our work, the synthesis of novel indanes derivatives as new antitumor agents, by acidic hydrolysis of the acetamide group, diazotisation of the amino group and reduction of the carbonyl group was studied.

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  • The aldo-keto reductase (AKR) superfamily comprises proteins that catalyse mainly the reduction of carbonyl groups or carbon–carbon double bonds of a wide variety of substrates including steroids. Such types of reactions have been proposed to occur in the biosynthetic pathway of the cardiac glycosides produced by Digitalis plants. Two cDNAs encoding leaf-specific AKR proteins (DpAR1 and DpAR2) were isolated from a D. purpurea cDNA library using the rat D4-3-ketosteroid 5b-reductase clone.

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  • Cotton bamboo fibers were prepared by mechanical method and their diameter were about 9- 26 µm. Surface composition and morphology of fibers were studied. The analytic result shown that most of hemicellulose and lignin were removed. There is a strong and sharp peak in the untreated bamboo spectra at about 1736 cm-1 corresponding to carbonyl group (C=O), but this peak disappeared in alkaline treated bamboo spectra. Epoxy composites reinforced cotton bamboo fiber have been developed with varying fiber contents.

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  • Chapter 18 introduce to Ketones and Aldehydes. After completing this chapter, students will be able to: Draw and name ketones and aldehydes, and use spectral information to determine their structures; propose single-step and multistep syntheses of ketones and aldehydes from compounds containing other functional groups; predict the products and propose mechanisms for the reactions of ketones and aldehydes with oxidizing and reducing agents, amines, alcohols, and phosphorus ylides;...

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