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Compound A (C11H16O) has a band in the IR spectrum at 3450 cm-1 (strong, broad) and does not react with pyridinium chlorochromate (PCC) in CH2Cl2. Compound A does react with HBr to give compound B (C11H15Br). Compound B reacts with potassium t-butoxide to give compound C (C11H14). Ozonolysis of C followed by treatment with Zn and water gives CH3CHO and compound D (C9H10O). The proton NMR spectrum of compound D is given below. Treatment of compound D with ethyl magnesium bromide yields A. Draw the structures of compounds A, B, C, and D. 1H NMR of D: ? 8.1-7.5, multiplet, 5H; 2.85, quartet, 2H; 1.30, triplet, 3H.
Why is it important to make sure all of your unknown has vaporized? Why is it important to put a pinhole in the aluminum "cap"?
The specific heat capacity of silver is 0.240 J/(g x degrees C). Calculate the energy (in kJ) required to raise the temperature of 263 g Ag from 273K to 278 K.
Would it be safer to store a nickell (II) chlorides solution in a lead container or a chromium container?
The atom then emits two photons: one of wavelength 1282.2 nm to reach an intermediate level and a second to return to the ground state. What was the wavelength of the second photon emitted?
The amount of energy needed to heat 2.00 g of carbon from 50.0°C to 80.0°C is 42.6 J. The specific heat capacity of this sample of carbon is ?
In a closed 1.00 L flask, 2.60 atm of CO reacts with 5.80 atm of O2 according to the equation below. Assuming that the temperature remains constant, what is the final pressure in the flask?
How would you expect the amino acids glycine, alanine, and phenylalanine to travel relative to each other on the silica plates using a mixture of chloroform/methanol/ammonia? Explain your answer.
Sketch a titration curve for the titration of 100mL of 1.25x10^-2 M ascorbic acid with 1.00x10^-2 M NaOH, given that Ka= 8.0x 10^-5 and Ka2= 1.6x10^-12. How many equivalence points should the curve have and what color indicator(s) could be used?
Draw structural formulas for all of the structural isomers of C4H10, C5H12 and C3H7Cl.
identify the functional group; and 3) and discuss general key chemical properties of the chemical that a fire, environmental, health or safety personnel should know.
Rhodium has a density of 12.45 g/cm3. This metal crystallizes in a face-centered cubic unit cell. Calculate the diameter of a rhodium atom?
solution of potassium sulfate. Assuming that all ionic species are completely dissociated, what is the osmotic pressure of the mixture in torr?
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