Which reaction sequence would be best for preparing 3,5-dibromoaniline from nitrobenzene?a.(i) excess Br2 + FeBr3 / heat (ii) 3 H₂ / Pt or Ni catalystb. (i) H2SO4/heat (ii) excess Br2 + FeBr3 / heat (iii) 3 H₂/ Pt or Ni catalystc. (i) 3 H₂/ Pt or Ni catalyst (ii) H2S04/heat (iii) excess HBrd. (i) 3 H2/Pt or Ni catalyst (ii) 2 Br2 in ether

Let's analyze each reaction sequence to determine which one is best for preparing 3,5-dibromoaniline…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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6. Complete reaction scheme below indicating reagents, catalysts and conditions, and side product trigil bezinslog si6101fon 290b 1l (b Senines levirba 6 gaubong nasamots gniwollot ads to doinW 01 sniowl (6 CH3 40 CH3 Scansgowi (d Ege nodie) ( nsgyxo (b NO₂ 19m02 2i gniwollet sits to mainW II HO
What reagents are needed in reaction 3? ... Br Br Reaction 1 Reaction 2 Reaction 3 CH3B AIBr3 (A) 3H2, Rh (with high pressure) B H2, PtO2 KMN04, H+ D) Br2, uv
(A) moose the correct product. 1. NaGE, Ero 2. H₂0, A 食。 CO₂ Et -CO₂E7 (B) Coret 31. Choose the best reagents. & 4 (A) 1. LAH; H₂0 2. CHz | 3. H₂0/H+ (B) 1. NaOH, -78% 2. CH31 3. H₂0/H (C) 1. LDA, -78%℃ 2. CH31 3. H₂₂0/H+ 1. Nah, 0°C 2. CH31 3. H₂2₂0/H+* (<) Colt (D)
HO NH2 CO₂Me PG! A NH HO PG² HO CO₂Me PG! NH `PG³ PG! `NH PG3 PG! `NH B PG2 CO₂Me C PG20 LiBH4 strong reducing agent, strong nucleophile PG! NH OH
In each reaction box, place the best reagent and conditions from the list. 1) CEN 2) 3) 4) 5) Answer Bank NANH, NaBH, acetone CH,CH, MgBr (excess) acetic acid acetate ion CH,OH, H,O* (cat.) LIAIH, (CH,),CHMgBr (excess) CH,MgBr (excess) H,0 H,0*, H,0, heat acetyl chloride
b) Design a synthetic scheme using the reagents given for the following two reactions. All reagents are used for each reaction scheme and in each case, a reagent can be used more than once. Take the necessary time to complete this question. i) = 2 eq. ii) 2 eq. O O H₂/Lindlar's catalyst Br₂/CH₂Cl₂ Se joon NaH H₂O+/H₂O H H₂/Lindlar's catalyst PCC/CH₂Cl₂ NaH lan -H H3O+/H₂O CH₂Br
Trimethyllead hydride, (CH3)3PbH, can react with methyl bromide (CH3Br) in a homolytic dissociation reaction. What will the lead-containing product be? (CH3)2Pb PbBr2 (CH3)3PbBr Pb metal
Useful Information: sodium metam: Commercial grade sodium metam is 33% pure sodium metam by weight and has a density of 1.2 g/mL. Hydrolysis of metam (Methyl isothiocynate) + H2S Rate constants for hydrolysis for metam (base catalyzed hydrolysis is negligible) = 300 mol -1 L. sec -1 , = 1 x 10-8 sec-1 Metam also undergoes photolysis to methyl isothiocyanate with a half-life of 1.6 hrs. Data for Sacramento River discharge Q = 75,000 L/min mean depth = 0.30 m pH = 7.8 mean width = 3.2 m dispersion coefficient D = 1.6 x 102 m2/min Assuming the spill acts acts as a single point source. How long does it take for the maximum contaminant concentration to get to Lake Shasta? If Na+ acts as conservative (i.e., it is not transformed) tracer, calculate the maximum concentration (in g/L) at Lake Shasta. (Hint: remember that sodium only constitutes a…
Predict the products, if any, of the following reactions. 20-35 (a) ascorbic ac (1) LiAlH4 -COOH (2) H3O+ (b) (1) NaCN CH₂Br (2) H3O+, heat (c) (1) SOCl2 (d) KMnO4, H₂O oct-4-yne (warm, concd.) (2) AlCl3 COOH (e) CH₂OH Na2Cr2O7, H2SO4 (f) Ph (1) BH3.THF CH3CH2-CH-COOH (2) H₁₂O+
(a) Under certain conditions, the reaction of 0.5 M 1-bromobutane with 1.0 M sodium methoxide forms 1-methoxybutane at arate of 0.05 mol>L per second. What would be the rate if 0.1 M 1-bromobutane and 2.0 M NaOCH3 were used?
Provide a plausible arrow pushing mechanism for the reaction belaw. 1. nBuLi 2. NMe MgCI HO,C 3. CO2 4. acidic workup NMez
2 (a) Allylation is a powerful way to make compounds such as 8 and 9 diastereoselectively. OH он allylation Ph or Ph Ph 8 9 (i) Allyl Grignard reagents [RCH=CHCH,MgBr] cannot be used to make 8 and 9 selectively. With the aid of a diagram explain why. (ii) Which isomer of the allyl boronate 10 would you require to synthesise 8 selectively? Draw and provide comments on the transition state of the allylation reaction of 10 with benzaldehyde to support your answer. B-O 10

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