The initial attack of ozone occurs in both stressed and unstressed rubber to give a molozonide, which is unstable and dissociates to give a Zwitterion (1) and a carbonyl compound
A number of [alpha], [beta]-unsaturated carbonyl compounds
were prepared by condensing of 2-formylfuran, 2-formylpyridine and 2-formylthiophene with acetone, acetophenone, 3-methyl-acetophenone, [alpha]-chloroacetophenone and ethyl methyl ketone in ethanolic NaOH solutions.
Researchers have found that the gas phase of mosquito coil smoke contains some carbonyl compounds
with properties that can produce strong irritating effects on the upper respiratory tract--for example, formaldehyde and acetaldehyde (Chang and Lin 1998).
21-23), (51) Furthermore, for carbonyl compounds
with an [alpha]-proton, a tautomeric equilibrium can exist between the imine and the enamine, but in which the imine form predominates.
Gold, moreover, is less reactive than copper and does not appear to form significant amounts of a carbonyl compound
under the conditions found in pottery kilns, so it remains in the glaze, where any particles that form are presumably either too small or too large to exhibit significant colour unless the glaze has a suitable composition.
In most cases these precursors have been prepared from carbonyl compounds
via reductive alkylation of protected hydrazines [3-5] (Scheme 1, A).
Organocatalytic Enantioselective Conjugate Additions of Heteroatoms to an Unsaturated Carbonyl Compounds
The third essay, titled 1,2-cycloaddition reaction of carbonyl compounds
and pentaatomic heterocyclic compounds, by three chemists at the university of the Basilica in Potenza, Italy, concerns the Paterno-Buchi reaction on Furan derivatives and on pentaatomic heterocycles differing from Furan.
Studies on polyatomic molecules are concerned principally with inductive and mesomeric effects in the (pi(*),pi) electronically excited states of substituted benzenes and the effects of conjugation on the energies, geometries and stabilities of singlet and triplet (pi(*)n) excited states of organic carbonyl compounds
13 One Group C-C Disconnections II: Carbonyl Compounds
Alpha-Heteroatom functionalization of carbonyl compounds
ALLYLBORATION OF CARBONYL COMPOUNDS (Hugo Lachance and Dennis G.
General considerations: Modification of the agenda: Principles governing the toxicological evaluation of compounds on the agenda: Principles for the safety assessment of chemicals in food: Flavouring agents evaluated by the Procedure for the Safety Evaluation of Flavouring Agents: [alpha], [beta]-Unsaturated carbonyl compounds
and aldehydes: Minimum assay values for flavouring agents: Requests for data relating to intake assessments: Principles governing the establishment and revision of specifications.
Pinacol type coupling of carbonyl compounds
and their aza-analogues became an interesting task in the 1990s .
Anthropogenic air pollutants are volatile compounds (VOCs), semi-volatile organic compounds (SVOCs), carbonyl compounds
, carbon monoxide, oxides of nitrogen, and particulate matter.