3-methyl 2-butanone and its geminal diol formed in water. Circle the predominant species at equilibrium
3-methyl 2-butanone and its geminal diol formed in water. Circle the predominant species at equilibrium
Question 2 1 pts Pick the correct name for the following compound: 3-methyl-2-butanone 2-methyl-3-butanone 2-methyl-3-butanal 2-methylpropanal none of these
Draw the two possible enols that can be formed from 3-methyl-2-butanone and show a mechanism of formation of each under basic conditions (NaOH/H2O). Show mechanisms.
Chemistry 425 Problem Set Unit 1 1. Circle the species that would be predominant free in water at physiological pH. "Y er ve one who . 6 5 pka = 5 2. Are the pKas of the indicated (red) protons higher, lower, or essentially the same as it would be free in solution? le has not part y
Practice Problems: 1a. Analyze the given H NMR spectrum of 3-methyl-2-butanone. Explain why there are 3 different signals. Assign the signals to the correct H's. 3-methyl-2-butanone 1b. Do the observed splitting patterns follow the N+1 rule? Explain. .2 3.0 2.8 fi (ppm) 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0. Be very careful: it is NOT the number of H's giving rise to a signal that determines its splitting pattern. Instead, it is the number of H's...
"uctions down Question 1 Pe Which reagents would favor the formation of 3-methyl 2-butanone from 2-butanone? 1. Nah, 25°C 2.CHgBr O H20 / CH2BE O 1. LDA -78°C 2.CH3Br O Both A and B all the reagents would give that product Question 2 2.5 pts
OCHEM LAB Why does hydration of 2-methyl-3-butyn-2-ol give the ketone, 3-hydroxy-3-methyl-2-butanone (4), rather than the aldehyde, 3-methyl-3-hydroxybutanal (5)? How can 4 and 5 be differntiated chemically? by spectroscopic methods?
What would the H NMR spectra look like for the compounds: 1. 3-Hydroxybenzaldehyde 2. 3-Methyl-2-butanone
write out all the steps to synthesize 3-methyl-2-butanone using acetoacetic ester synthesis. you may use any starting materials
Draw the kinetic and thermodynamic enolates formed when 3-methylbutan-2-one (methyl isopropyl ketone) is treated with base. Include charges. Draw the oxyanion species; do not draw carbanion resonance forms.
Using an aldol reaction, suggest a suitable starting material and reagents for the synthesis of 4-hydroxy-4-methyl-4-phenyl-2-butanone. Select one: a. benzyl alcohol heated with sodium hydroxide, followed by reaction with 4-bromo-2-pentanone b. acetone treated with sodium hydroxide at 5oC, followed by reaction with acetophenone in water c. benzoic acid treated with sodium ethoxide at 5oC, followed by reaction with 4-bromo-2-butanone in water d. acetophenone heated with sodium ethoxide in ethanol, followed by reaction with 2-propanone in the presence of acid e....