V. Using your knowledge on structural effects, account for the following observations by giving appropriate explanations. 1) Boron trifluoride (BF3) is a stronger Lewis acid than trimethyl borate [(CH3O);B]. 2) Piperidine is a much stronger Lewis base than pyridine.
Q: b) Rank the following compounds in decreasing order of expected acidity (i.e. from strongest to…
A: The ranking with explanation is as follows:
Q: A precursor for para-aminophenol, para-nitrophenol, can be obtained by the nitration of phenol using…
A: Nitration is electrophilic aromatic substitution reaction.
Q: The ionization of monoprotic organic acid with a Ka of 6.7 × 10 -4 is 3.5%. Calculate the molecular…
A: The ratio of moles of solute to the volume of solution in liters is known as molarity.
Q: An organic compound (A) was heated with a solution of NaOH. The resulting solution was cooled,…
A: To form a precipitate, the chloride ion (Cl-)needs to detach. This Cl-, once free, interacts with…
Q: Substantially discuss how Nitration of Toluene works
A: Toluene gives ortho and para isomer by the nitration,but it heated it can be give dinitro toluene…
Q: Give two physical properties of this compound that justifies the occurrence of the strongest IMFA…
A: Please find your solution below : Intermolecular forces of attractions are the attraction that hold…
Q: Draw the structure of the predominant form (principal species) of 1,3-dihydroxybenzene at pH 9.00…
A: The structure of dihydroxy benzene is as follows,
Q: Which compound (i or ii) is the stronger base? Discuss your answer comprehensively by amongst other…
A: The answer is as follows:
Q: Explain the differences in acidity between p-cyanobenzoic acid and m-cyanobenzoic acid. Illustrate…
A: The molecule which is able to donate proton easily in the molecule is more acidic while which not…
Q: Fiskesjo, is one of the pioneers of allium test. Diagram his procedure and a recently conducted…
A:
Q: In synthesizing primary (1⁰) amines by alkylation of NH3, explain how we can prevent the formation…
A: Given statement is : In synthesizing primary (1⁰) amines by alkylation of NH3, explain how we can…
Q: 1. Arrange the test samples in order of increasing reactivity with sodium bicarbonate? Explain…
A: ✓(1)Generally acidic strength of aliphatic monocarboxylic acid is decreases on increasing with…
Q: Provide detailed explanation and analysis for preparation of methyl orange.
A: Methyl orange is used as dye.
Q: To meet the ever increasing demand of global population, the demand for textile products and…
A: When a color-producing substance is involved in bonding with a material on which it is applied and…
Q: negatives with the haloform test. What compound did he find compatible with the haloform test? That…
A: Any ketone compound, reacts with Brady's reagent and precipitated.as follows
Q: 2. Reactivity of Carboxylic Acid Derivatives a. Rank the following carboxylic acid derivatives in…
A: Nucleophilic acyl substitution reaction are defined as the class of substitution reaction that…
Q: Arrange the following acids in order of increasing acidity when allowed to react with NH3. Provide…
A: According to the Lewis acid-base, the Lewis acid is the one that accepts the pair of electrons due…
Q: prepare a flow sheet for the preparation of benzoic acid from a) bromobenzene and magnesium and b)…
A: From grignard reagent this can be done .
Q: A student was given from the list of the compounds below A, B and D blindly and asked to identify…
A: In this question D- are occurred in the haloform test as it is a methyl ketone (-COCH3 group).
Q: Discuss the fatal flaw in the following reaction and provide a rational solution to alleviate he…
A: Friedel-Craft alkylation reaction:When the benzene reacts with an alkyl halide in presence of Lewis…
Q: What color do you expect for cresol purple at pH 1.0, 2.0, and 3.0?
A: The pH at 1 to 3 cresol purple indicates, red color (acid color)
Q: p-Nitrobenzyl alcohol is more acidic than benzyl alcohol but p-methoxybenzyl alcohol is less acidic.…
A: The compounds given are p-nitrobenzyl alcohol, p-methoxybenzyl alcohol and benzyl alcohol.
Q: Discuss the reaction of organometallic reagents as strong bases ?
A: Organometallic reagents are compounds which contains carbon-metal bonds.
Q: If you have 1L of 1M Lys-Ser at its pl, how many moles of NaOH would be required to convert it to…
A:
Q: Point out the hydrophilic and hydrophobic regions in the structures of benzalkoniumchloride,…
A: Concept introduction: The hydrophilic parts are mostly long chain hydrocarbons which are soluble in…
Q: Show how to convert carboxylic acids to other functional groups, and devisemultistep syntheses using…
A:
Q: Write the equilibrium-constant expressions and obtainnumerical values for each constant in. (a) the…
A:
Q: OH then
A: According to Q&A guidelines of Bartleby, we are supposed to answer only the first question out…
Q: (a) Although phenoxide ion has more number of resonating structures than carboxylate ion, carboxylic…
A: Resonance is the delocalization of electrons over the atoms present in the conjugated compounds.
Q: The protonated form of aniline has a pk, of about 4.6. At what pH would you expect the species to…
A: Aniline is a six-membered ring (Benzene) attached to an amine functional group. The Amine group is a…
Q: Which compound (i or ii) is the stronger base? Discuss your answer comprehensively by amoungst other…
A: 1- (II) compound is less basic because it's having benzene ring on para-position which act as…
Q: Predict the predominant species of the compound that would be present were this hydroxy-acid is…
A: Here we are required to draw the predominant species at pH =7 .
Q: Phenols are less acidic than carboxylic acids, with values of pKa around 10. Phenols aredeprotonated…
A:
Q: Explain and show the synthesis of Losartan and the lead compound of Losartan? Please answer at your…
A: Answer - Losartan is metabolized by the liver via the cytochrome P450 system, predominantly by CYP…
Q: acidity:ethanol,ethylene glycol, acetic acid, 2,4-pentanedione,oxalic acid solid
A: Acid is substance which release hydrogen ions and base is a substance which abstract hydrogen from…
Q: Assuming you are a chemist and you need to extract ethanolic acid in a benzene solution. Propose and…
A: A salt of carboxylic acid is more soluble in water. So, a wash with NaOH converts the ethanoic acid…
Q: Which compound (i or il) is the stronger base? Discuss your answer comprehensively by amongst other…
A: 1- ( II ) compound is less basic because it's have benzene ring on para-position which act as a…
Q: The structure of a new antihistamine drug that is structurally related to fexofenadine is attached.…
A:
Q: 6. To the right are shown an alkane, alkene, and alkyne. (i) State the approximate pKa values of the…
A:
Q: O2N 02 N H2 S04
A: The given compound get rearranged in the presence of an acid catalyst. The compound contains a…
Q: What will be the main product of the reaction. Give detailed solution in clear handwritten!
A: Friedel-Craft alkylation reaction: When the benzene reacts with an alkyl halide in presence of Lewis…
Q: 1. A student wants to synthesize compound C from the compounds A and B under alkaline (basic)…
A: The base is a substance that can furnish its unshared electron pair to other substances. For…
Q: la) Biliverdin is a pigment produced by tree frogs that causes them to look green - its structure in…
A: Given the pKa values of the two ionizable groups are: pKa1 = 3.9, and pKa2 = 5.3
Q: Give a clear handwritten answer..and give all possible products
A: Claisen-Schmidt condensation: Aromatic aldehyde/ketone without alpha hydrogens are treated with…
please explain well and type if you can...
Step by step
Solved in 2 steps with 1 images
- Use Drago’s E and C parameters to calculate ΔH for the reactions of NH3 and BF3 and of NH3 and B(CH3)3. Compare your results with the reported experimental values of −71.1 and −64 kJ/mol for NH3—B(CH3)3 and −105 kJ/mol for NH3—BF3. use NH3 as the base, and put the four reactions in order of the magnitudes of their ΔH values.2,4-Pentanedione is a considerably stronger acid than is acetone (Chapter 19). Write a structural formula for the conjugate base of each acid and account for the greater stability of the conjugate base from 2,4-pentanedione.4. The pk, of vanillin is about 9, which is much more acidic than a normal alcohol. Draw a reaction showing the deprotonation of vanillin with NaOH, and then draw six resonance structures of the conjugate base. Draw the hybrid structure and clearly indicate how the negative charge is distributed in the compound.
- 9. Consider the neutral base pyrrolidine, C4H9N, designated B. (a) Which is the predominant species, B or BH¹, at pH 11? At pH 12? (b) At what pH is [BH] = [B]? (c) What is the quotient [B]/[BH] at pH 12.00? at pH 2.00?I'm asked to "assume that ozempic is in a solution at pH = 7. Draw the functional groups at their correct protonation form". For this, would I make all of the carboxyl groupsgo from COOH to COO-? and then the amide groups go from CONH to CONH3 + ? What about ether groups (COC) ?The pH of a 0.12 M solution of acetic acid (HCH3CO2) is measured to be 2.83. Calculate the acid dissociation contant Ka of acetic acid.
- C6H5NH2 + H2O <-> C6H5NH3+ + OH-. Aniline, a weak base, reacts with water according to the reaction. (a) a sample of aniline is dissolved in water to produce 25.0 mL of 0.10 m solution. The pH of the solution 8.82. Calculate the equilibrium constant, Kb, for this reaction (b) What is the percent disassociation for the solution in part (a) (c) 25.0 mL of 0.10 HCI was then added in a titration experiment. What is the pH at the equivalence point?Calculate the pH of a 0.365 M solution of ethylenediamine (H,NCH, CH, NH,). The pKa values for the acidic form of ethylenediamine (H†NCH,CH,NH†) are 6.848 (pKa1) and 9.928 (pKa2). pH =| 11.25 Calculate the concentration of each form of ethylenediamine in this solution at equilibrium. [H,NCH,CH,NH,] = M [H,NCH,CH,NH)= M [HNCH,CH,NH;) = MCompare the pH of propionic acid and nitric acid when they are dissolved in water at a concentration of 20 mM. This should include writing a balanced equation describing the acid-base reactions involved, calculation of the pKa for both, calculation of pH, and calculation of the percent dissociation of both.
- (a) Tsomane and Nyiko were given a task of synthesising methylenecyclohexane 2. After a brief discussion with each other, Tsomane proposed Method A to synthesise 2 from cyclohexanone 1 while Nyiko proposed Method B that started from hydroxymethylcyclohexane 3. Each student believed that their proposed method is better than the other. (Scheme below) (ii) Ph Ph Ph 640 THF A 1 B H₂SO4 100 °C 3 OH In analysing both these methods, are there other possible alkene products other than methylenecyclohexane 2?In the following reaction in aqueous solution, the base reactant is and its conjugate acid product is CH3COOH(aq) + NH3(aq) CH3COO (ag) + NH4 (ag) O NH3: NH4 NH3: CH3COO CH3COOH; NH4 CH3COOH; H30+ CH3COOH; CH3CO*5. The structure of anthocyanin, a naturally occurring compound that acts as a pigment in many fruits and vegetables, is given below. At low pH values (<3), it exists as the cation shown below and exhibits a bright red color. At higher pH values (-7), it exhibits a purple-ish color, indicating a shift to a longer wavelength absorption in the UV-visible spectrum. As the pH is raised from pH 3 to pH 7, one of the hydroxyl groups can be deprotonated (the H that is removed has been circled for you) to produce the corresponding resonance stabilized neutral compound. Draw the two most stable Lewis octet resonance structures for this anthocyanin at pH 7. Make sure to explicitly show all non-bonding lone pairs and formal charges where appropriate. Include curved arrows to show how you got from the first resonance structure to the other. 5. :: :: HO 0:0 : ÖH :O: -[sugar] anthocyanidin structure at pH 3 red color compound (H+) first structure here second structure here 1 -