The smallest ketone is 2-propanone, which has a 3-carbon chain. Why aren't there ketones with 1-carbon or 2-carbon chains? Give an explanation. Why are aldehydes are much more reactive than ketones? Why are the alpha-hydrogens in an aldehyde or ketone more acidic than any of t...
UsingL6as the ligand, we explored the scope of the reaction with respect to the unsymmetrical dialkyl ketone substrate (Fig.3). First, we tested ketones with primary and tertiary α-carbons (Fig.3a). Because of the alkyl/alkyl steric repulsion on the same side of the more-substituted enolat...
The bottom-up strategy, combining a core-knot with linkers, is the most common approach for POP preparation.47–49 As shown in Fig. 1a, 1,3,6,8-tetraethynylpyrene (TEP) serves as the alkynyl building block of the pyrene-based knot with D2h symmetry. The different dibrominated precursors...
If iodine reacts with a methyl ketone, iodoform, CHI3, forms. It is a bright yellow, insoluble solid. Under basic conditions, the carboxylic acid product shown exists as an anion. However, after neutralization in the workup of the reaction mixture, the products are a carboxylic acid and C...
Known as the shortest MCT, caproic acid contains six carbons in each fatty acid chain. Although it can be converted quickly to ketones, it has a bitter taste and may cause stomach problems. It can be found naturally in plant and animal sources, but generally comes with an unpleasant odor....
We then found that by using the more electron-deficient NHC pre-catalyst E, the products (3o–3q) could be obtained with good to excellent enantiomeric excesses. It appears that the electronic properties of both the imine substrates and NHC catalysts could significantly affect the enantioselec- ...
Carbon double-bonded to oxygen Carbonyl carbon bonded to two other carbons 15 Examples Aldehydes, ketones, carboxylic acids Acetone, butanone 15 Characteristic General descriptor for a range of compounds Specific class of compounds 13 Compare with Definitions Carbonyl A polar group often involved in nuc...
medium chain fatty acids (e.g., fatty acid with 6-12 carbons), medium chain triglycerides (e.g., triglycerides with 7-12 carbons), long chain fatty acids (e.g., fatty acids with more than 12 carbons), long chain triglycerides (e.g., triglycerides with more than 12 carbons), and/or...
In another embodiment of the invention, advantageous alkyl group for R1 and R2 include linear or cyclic alkyl groups with 1-30 carbons which include but are not limited to methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, cyclobutyl, cyclopenty...
Two novel poly (aryl ether ketone)s with anthracene moieties in the backbone were synthesized through the conventional nucleophilic aromatic substitution polycondensation for the first time, by using a new bisfluoro monomer, 9,10-bis(4-fluorobenzoyl) ant