Carbonyl sentence example

carbonyl
  • The carbonyl group is not ketonic in character since it yields neither an oxime nor hydrazone.

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  • The resulting compound, nickel carbonyl, which was described to the Chemical Society in 1890, is both formed and decomposed within a very moderate range of temperature, and on this fact he based a successful process for the extraction of nickel from its ores.

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  • By transformations of the carbonyl group, and at the same time of the hydroxyl group, many interesting types of nitrogen compounds may be correlated.

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  • A larger and more important series of condensations may be grouped together as resulting from the elimination of the elements of water between carbonyl (CO) and methylene (CH 2) groups.

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  • Thus a double bond of oxygen, as in the carbonyl group CO, requires a larger volume than a single bond, as in the hydroxyl group - OH, being about 12.2 in the first case and 7.8 in the second.

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  • Thus oxygen varies according as whether it is linked to hydrogen (hydroxylic oxygen), to two atoms of carbon (ether oxygen), or to one carbon atom (carbonyl oxygen); similarly, carbon varies according as whether it is singly, doubly, or trebly bound to carbon atoms.

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  • The principal chromophores are the azo, -N = N -, azoxy, = N 2 O, nitro, - N02, nitroso, - NO, and carbonyl, = CO, groups.

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  • The carbonyl group by itself does not produce colour, but when two adjacent groups occur in the molecule, as for example in the a-diketones (such as di-acetyl and benzil), a yellow colour is produced.

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  • Nascent hydrogen reduces them to primary alcohols, and phosphorus pentachloride replaces the carbonyl oxygen by chlorine.

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  • Chromic acid converts it into phosgene (carbonyl chloride, COC1 2).

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  • On oxidation, the molecule is split at the carbonyl group and a mixture of acids is obtained.

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  • Sodium amalgam reduces them to secondary alcohols; phosphorus pentachloride replaces the carbonyl oxygen by chlorine, forming the ketone chlorides.

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  • This was burnt mouth-down in the oven., and the ashes on the ground reduced the red haematite to black magnetic oxide of iron; some traces of carbonyl in the ash helped to rearrange the magnetite as a brilliant mirror-like surface of intense black.

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  • It reacts with carbonyl compounds, giving semi-carbazones, and in consequence is frequently used for characterizing such substances.

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  • Nickel carbonyl, however, is extremely poisonous.

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  • When mesitylene is used, the reaction does not proceed beyond the aldehyde stage since hydrocarbon formation is prevented by the presence of a methyl group in the ortho-position to the -CHO group. Acids and alkalis are in general without action on nickel carbonyl.

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  • The vapour of nickel carbonyl burns with a luminous flame, a cold surface depressed in the flame being covered with a black deposit of nickel.

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  • Pyrocatechin readily condenses to form heterocyclic compounds; cyclic esters are formed by phosphorus trichloride and oxychloride, carbonyl chloride, sulphuryl chloride, &c.; whilst ortho-phenylenediamine, o-aminophenol, and o-aminothiophenol give phenazine, phenoxazine and thiodiphenylamine.

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  • It is also decomposed by carbonyl chloride (Besson, loc. cit.).

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  • Of great interest are the carbonyl compounds.

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  • The aldol condensation (using aldehydes, ketones, two different carbonyl partners, and the intramolecular variant ).

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  • Deprotonation of the cysteine sulfhydryl by an adjacent histidine residue is followed by nucleophilic attack of the cysteine S on the peptide carbonyl carbonyl carbon.

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  • Note how, within the plane of the sheet, backbone carbonyl oxygen atoms point toward backbone amino N atoms of the adjacent strand.

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  • Application of the 18 electron rule to metal carbonyl complexes.

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  • To establish the viability of 18 as a ligand we reacted it with a range of transition metal carbonyl compounds with mixed results.

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  • Simultaneously, the other aspartate donates a proton to the oxygen of the peptide carbonyl group.

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  • In contrast, formation of threohydrobupropion involves carbonyl reduction but does not involve cytochrome P450 isoenzymes.

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  • What does the latter evidence indicate as regards the behavior of the carbonyl ligands at the temperature of the measurement?

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  • The camphor molecule has one polar atom (a carbonyl oxygen) and three methyl groups.

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  • In contact with chlorine monoxide it forms carbonyl chloride and thionyl chloride (P. Schiitzenberger, Ber., 1869, 2, p. 219).

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  • It unites directly with chlorine, forming carbonyl chloride or phosgene (see below), and with nickel and iron to form nickel and iron carbonyls (see Nickel and IxoN).

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  • The iron and ruthenium clusters not only lost their carbonyl ligands, but their cluster cores were also fragmented.

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