Please step by step answer please Answer ONE question only from this section11.Answer ALL parts of this question:(b)(a) Consider the following aromatic electrophilic substitution reaction (SchemeQ11a):CHHNO/H₂SOACH3(Scheme Q11a)0What are the possible products?(ii)(2 marks)Is the ispo product possible in this case? Explain your answer.(2 marks)(!!!)Write down the resonance structures (Wheland intermediates) thatform during electrophilic attack of NO₂+ on the benzene ring, in theabove reaction (Scheme Q11a).(3 marks)Both phenol and toluene (Scheme Q11b) can react with nitric acid to formtri-nitrated products. However, the reaction conditions leading to theseproducts are very different.OHHNO3 (aq)conditionsCH3HNO/H2SO4conditions(Scheme Q11b)Question 11 is continued overleaf...11

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Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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For the following reaction: HNO3 H2SO4 NO2 NO2 NO2 10% 8% 82% 1. Write a reasonable mechanism, using curved arrow notation to show the flow of electrons, for the formation of all three products. Your answer should include all important resonance structures. 2. Using the mechanism and resonance structures, provide an explanation for the product ratios shown.
Stearidonic acid (C18H28O2) is an unsaturated fatty acid obtained from oils isolated from hemp and blackcurrant (see also Problem 10.11). a. What fatty acid is formed when stearidonic acid is hydrogenated with excess Hạ and a Pd catalyst? b. What fatty acids are formed when stearidonic acid is hydrogenated with one equivalent of Hz and a Pd catalyst? c. Draw the structure of a possible product formed when stearidonic acid is hydrogenated with one equivalent of H2 and a Pd catalyst, and one double OH stearidonic acid bond is isomerized to a trans isomer. d. How do the melting points of the following fatty acids compare: stearidonic acid; one of the products formed in part (b); the product drawn in part (c)?
Identify any combination reactions. (Select all that apply.) C4H10 + O2 → CO2 + H2O S8 + O2 → SO3 NaNO3 → NaNO2 + O2 HgO → Hg + O2 Ga + H2SO4 → Ga2(SO4)3 + H2 AgCl2 + H2 → Ag + HCl none of the above Identify any decomposition reactions. (Select all that apply.) C4H10 + O2 → CO2 + H2O S8 + O2 → SO3 NaNO3 → NaNO2 + O2 HgO → Hg + O2 Ga + H2SO4 → Ga2(SO4)3 + H2 AgCl2 + H2 → Ag + HCl none of the above
Propose a mechanism for the conversion of 2,4,6-trimethylphenol to compound A.
The reaction quotient is Q=1.6×10-26 Part B What pH is needed to produce this value of Q if the concentration and pressure values are [Br2]=2.50×10−4M , [Br−]=11.65M, [SO42−]=9.50M, and PSO2=3.50×10−5atm ? Express your answer numerically to two decimal places.
In the electrolysis of aqueous sodium bromide, there are two possible anodic reactions: *2H2O(l) ——-> 02(g) + 4H+(aq) + 4e–, E° = 1.23V2Br–(aq) ——–> Br2(g) + 2e-2, E° = 1.08 VWhich reaction occurs at anode and why?
Dehalogenase enzymes catalyze the clevage of C-X bonds. One such dehalogenase catalyzes the following reaction. An active site aspartate is thought to carry out the initial nucleophilic attack that expels the chloride. Select the most likely intermediate in the reaction. (Note the stereochemistry. Refer to P11.19 in the textbook if needed.) O O A C D OE -CH₂ H H₂C™ CO₂ H B CO₂ CI N H₂O Cr CO₂ H CO₂ нотум CH3 D CO₂ five N E CH₂
Given the following choices,a. what is the structure of the product of the reaction catalysed by ACAT?b. structure of the product produced from the reaction catalysed by phospolipase A2?c. general structure of TAGd. structure of glycerol
The decomposition of various substituted benzyl azoxyarenesulfonates in trifluoroethanol was studied. The overall reaction is shown below F3C OH CF3 HO,S + N20 The decomposition of various substituted benzyl azoxyarenesulfonates in trifluoroethanol was studied. The overall reaction is shown below F,C OH HO,S + N,0 Y kobs (S ') 3-CI CH3 3.1 x 10-7 4-CI CH3 2.3 х 10-6 3-CH3 4-CH3 4-OCH3 CH3 CHs 4.7х 10-6 CH3 7.6х 10-6 CH3 6.0 x 10-5 1.7 x 10-3 4-CH OCH3 4.24 x 10-5 4-CH3 4-CH3 4-CH3 CH3 Br 6.0 x 10-5 1.91 x 10-4 CN 4.65 x 10-4 a. Using the data provided, prepare Hammett plots to quantify the effects of the substituents X and Y on the reaction's rate. Attach them to your problem set. b. Based on your Hammett analysis, propose a complete, curved-arrow mechanism for this reaction. Use a sentence or two to explain how your Hammett analyses support your proposed mechanism.
In observing a Haworth or cyclohexane-chair representation of alpha-d-glucopyranose, the anomeric carbon can de best identified by: a) the carbon atom which is bonded to the most H atoms b) the carbon atom which is bonded to the least H atoms c) The carbon atom which has its OH group pointing down d) The carbon atom which is bonded to two oxygen atoms Cellulose differs from amylose in that: a) cellulose has 1-6 branches while amylose does not b) amylose has 1-6 branches while cellulose does not c) amylose has alpha glycosidic bonds while cellulose has beta glycosidic bonds d) cellulose contains sulfate while amylose does not. The glycosaminoglycan (mucopolysaccharide) which is not normally associated with joint tissue is: a) heparin b) keratan sulfate c) chondroitin sulfate d) hyaluronic acid In glycoproteins, which amino acid does not bond sugar molecules? a) Asn b) Ser c) Thr d) Gly Which feature do all lipid molecules share in common? a) fatty acid molecules…
The Keq for the reaction of water with water is called Kw H2O + H2O ⇔ H3O+1 + OH-1 [H3O+1][OH-1] Kw = ––––––––––––– = [H3O+1][OH-1] = (1 x 10-7)2 = 1 x 10-14 [H2O]2
I Write a balanced equation for each of the following two reactions that you will use in this activity. In the boxes provided, draw a diagram showing this reaction at the molecular level. Be sure that the drawing shows conservation of mass (see Figure 1.7A and B). a Calcium chloride reacting with sodium phosphate (double replacement) CaCl2 (aq) + NazPO4 (aq) → (_) + Reactants Products b Zinc reacting with hydrochloric acid (single replacement) Zn (s) + HCI (aq) → (_) + Reactants Products

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