EBK ORGANIC CHEMISTRY-PRINT COMPANION (
4th Edition
ISBN: 9781119776741
Author: Klein
Publisher: WILEY CONS
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9. Phosphotyrosine (shown below) has four ionizable functional groups (pK1 = 2.5, pKR1
= 2.1, pKr2 = 7.2, pK2 = 9.5).
(a) Write the equilibrium equation for its four ionization forms and assign the proper
pka for each ionization. DRAW the structure of phosphotyrosine in each ionization
state. What is the net charge on the phosphotyrosine molecule in each ionization
state?
*H3N.
pk2 - 9.5
.COOH
pK, - 2.5
O=P-OH pKRI - 2.1
ÖH
pKRI - 7.2
(b) Draw the titration curve of phosphorotyrosine and indicate each pKa and the
isoelectric point (pl), indicate the molar equivalents of OH on the x-axis.
11. The reaction for the magnesium cation with 8-hydroxyquinoline is carried out in the presence of:A) Nitric acidB) Sodium hydroxideC) A solution of ammonia and ammonium chlorideD) Sulfuric acidE) Sodium acetate
Write an introduction on the ferrocene molecule, describing it's structure. What would happen if ferrocene was acetylated. Discuss the two products that may be formed due to the attachment of the acetyl group. Draw this in a reaction mechanism.
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