What effect might having the hydroxy group alpha (next door to) the carboxylic acid have on the pKa of the acid, and why?
What effect might having the hydroxy group alpha (next door to) the carboxylic acid have on...
the two carboxylic acid groups of aspartic acid have different acidities with pKa values of 2.1 and 3.9. Predict which acid group is the more acidic by considering the effect of the -nh3+ group on the stability of the conjugate bases. Explain your reasoning.
Alanine is a diprotic amino acid with a pka = 2.344 for the carboxylic group and a pka = 9.868 for the ammonium group. At pH = 6.32, what is the principal species in solution? a. H2L+ b. c. HL d. H3L2+ e. L2-
The carboxylic acid group (COOH) in the side chain of Aspartic acid (shown below), one of the 20 naturally occurring amino acids, has a pKa of 4.1. Calculate the percentage of conjugate base (COO- ) for this carboxylic acid group in the side chain of Aspartate at the following pH values: 2.1 , 4.1 and 5.1.
One of the problems with excellent data in vitro is that it is not always guaranteed to be equivalent to data in vivo. Therefore, it is important that what gives in vitro problems are resolved before getting the drug into in vivo studies to give it a better chance. For the following problems, how would you address each of the following for a target in the ER (CFTR)?1. If the drug is a small molecule with a carboxylic acid functional group...
If 0.2 grams mono carboxylic acid x (having one COOH group) are dissolved in 20 mL 95% If 0.2 ethanol and carry out titration with NaOH solution using phenolphthalein as indicator. If 16.4 mL of 0.1 M (mol/L) NaOH are required at the end point, then i) Calculate the Molecular mass of the carboxylic acid
which of the following substituents will stabilize the charge on the carboxylic acid on the benzene ring created during hydrolysis. And why? 1. methyl group at the para postion to the carboxylic group on the benzene ring 2. methyl group at the meta position to the carboxylic acid group on the benzene ring 3. methoxy group at the meta position to the carboxylic acid group on the benene ring 4. methoxy group at the para position to the carboxylic acid...
If the H of a carboxylic acid is replaced by an alkyl group, what is the resulting compound? O aldehyde alcohol O ester ® ketone Save Question 14 (1 point) Explain why it is advantageous to cell formation for glycerophospholipids to be able to interact with both polar and nonpolar substances Save
Question 2 1 pts Amino acids are classified by their Rgroup (side chain) carboxylic acid group peptide bond alpha carbon amine group
In #5 (carboxylic acid), why doesn't the AlH4(-) attack the carbonyl carbon and proceed to the tetrahedral intermediate...why does it instead attack the hydroxy group to form O-AlH3 and then does an H(-) attack on the carbonyl carbon? On the other hand, in #1 (ester), the ALH4(-) attacks the carbonyl carbon...tetrahedral intermediate, OCH3 leaving group, etc. (this is the mechanism I expected #5 to be) 03 O-Al H-Al-H H-Al-H H-Al-H OH
Carboxylic acids are organic compounds that have the general formula RCOOH where Ris any carbon-containing group. They all have the following structure: R-C-O-H Acetic acid is a carboxylic acid in which R CH3. (CH3 is called a "methyl" group.) Formic acid is the simplest organic acid in which RH. The Ka for formic acid is 1.7 x 10-4. Write the balanced equation for the reaction offormic acid with water. What is the name and Kb for the conjugate base of...