CECH HO, H,SO4 HgSO4 Alkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product...
Keto-enol Problems 21.9 Among each pair, which keto molecule will have the most enol content? Hint: draw the enol for each and then decide which will have more enol. alla mo 21.10 Write reasonable mechanisms to explain the following racemization rxns. 21.11 Write reasonable mechanisms for the following rxns. como mi B-addition Problems 21.12 Draw the product for the following...
4. Which tautomer of phenol is favored and why? A. enol, better hydrogen bonding C. keto, better CO resonance B. enol, aromaticity D. 1:1 both keto and enol forms are favored 5. Which base will completely and irreversibly form the enolate of the compound shown?: ? A. KOH B. NaOH C. NHS D. NaNH2
1) Select the option which indicates how tautomers of carbonyl compound isomers are related: A. R/S stereoisomers C. keto/enol constitutional isomers B. cis/trans geometric isomers D. branched alkane constitutional isomers 2) Indicate the correct keto isomer for the compound on the left: OH ОН ? C. D. A. B. OH 3) Of these options, which tautomer of phenol is favored?...
which of the following can undergo keto-enol tautomerism? Question 13 (2.5 points) Which of the following can undergo keto-enol tautomerism? 2-methyl-3-pentanone 3,3-dimethyl-2-butanone both a and b neither a norb
Addition of water to an alkyne gives a keto-enol tautomer product. Draw the ketone that is in equilibrium with the given enol.
Addition of water to an alkyne gives a keto-enol tautomer product. Draw the ketone that is in equilibrium with the given enol.
Addition of water to an alkyne gives a keto-enol tautomer product. Draw the ketone that is in equilibrium with the given enol.
3. Consider ketones A and B. i ii a. The "keto" form of A is largely favored at equilibrium over the "enol" form. Draw both bota and enol forms, and explain. b. The "enol" form of B is largely favored at equilibrium over the "keto form. Draw both kata and enol forms, and explain. 4. Rank the molecules below in...
4. (15 Points) Pericyclic Reactions: The transformation below can be described as a pericyclic reaction followed by a polar-acidic mechanism, where the acid is not shown because it is picked up from the environment. (a) Start by redrawing the starting material below, and show how the pericyclic reaction occurs with curved arrows. (b) Specify the type of pericyclic reaction it...