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- Show how acid derivatives hydrolyze to carboxylic acids under either acidic or basicconditions. Explain why some acid derivatives (amides, for example) require muchstronger conditions for hydrolysis than other derivatives.Histidine is an important catalytic residue found at the active sites of many enzymes. In many cases, histidine appears toremove protons or to transfer protons from one location to another.(a) Show which nitrogen atom of the histidine heterocycle is basic and which is not.(b) Use resonance forms to show why the protonated form of histidine is a particularly stable cation.(c) Show the structure that results when histidine accepts a proton on the basic nitrogen of the heterocycle and then isdeprotonated on the other heterocyclic nitrogen. Explain how histidine might function as a pipeline to transfer protonsbetween sites within an enzyme and its substrateThe following compound is derived from one of the twenty mammaliam "amino acids". It is the ethyl ester of arginine . If you offer a proton (H+) to this molecule, what is the expected conjugate acid that is formed. Draw its structure, thank you!
- What is the correct order of descreasing acidity of the following ClCH2CO2H FCH2CH2NH2 HI ICH2CO2H HCl strongest to weakest 10. what is the correct order of decreasing basicity? CH3ONa CH3CO2Na CH3CH2NHNa CH3SO3Na NaCl strongest to weakestAniline (conjugate acid pKa 4.63) is a considerably stronger base than diphenylamine (pKa 0.79). Account for these marked differences.Identify the most acidic acid. a. ClCH2COOH b. FCH2CHOOH c. CH3COOH d. BrCH2COOH e. ICH2COOH f. can't be determined
- Table of unknown carboxylic acidsMeltingRange Acid MW MeltingRange Acid MW77-78 phenylacetic 136.15 152-153 adipic (hexanedioic) *** 146.1483-85 2,2-dimethylglutaric 160.17 155-157 3-chlorobenzoic 156.5786-88 4-methoxyphenylacetic 166.17 155-158 3-bromobenzoic 201.0298-100 o-anisic (2-methoxybenzoic) 152.15 157-159 4-chlorophenoxyacetic 186.59100-102 3,3-dimethylglutaric 160.17 158-160 salicylic (2-hydroxybenzoic) 138.12103-105 o-toluic (2-methylbenzoic) 136.2 159-162 4-chloro-3,5-dinitrobenzoic 246.56122-123 benzoic 122.12 162-163 2-iodobenzoic 248.02128-131 thiodiglycolic *** 150.15 180-182 p-toluic (4-methylbenzoic) 136.15131-134 3,3’-thiodipropionic *** 178.21 182-185 p-anisic (4-methoxybenzoic) 152.15133-134 trans-cinnamic 148.16 187-190 succinic (butanedioic) *** 118.09139-140 2-chlorobenzoic 156.57 210-211 phthalic (benzene-1,2-dioic) *** 166.14140-142 3-nitrobenzoic 167.12 215-217 4-hydroxybenzoic 138.12148-150 2-bromobenzoic 201.02 239-241 4-chlorobenzoic 156.57144-148…Choose the correct option. •The basicity of a poly(vinyl amine) _______________ with increasing protonation of nitrogen. a) Increaseb) Decreasec) May increase or decreased) Does not effectRank the following compounds in terms of increasing acidity:I. C2H5OHII. C6H5OHIII. NaOC2H5IV. CH3COOH
- Sort the compounds below in order of increasing acidity. Explain your answer.Asteltoxin, isolated from cultures of Aspergillus stellatus, exhibits a potent inhibitor on E. coli BF1 ATPase activity. During S. L. Schreiber's synthesis of asteltoxin, substance 1 was treated with a strong base to form anion 2. a) Identify the most acidic proton at 1 and justify your choice using all the necessary representations.Which of the compounds shown below is the most acidic hydrogen and what is the approximate pKa value?