Reactions of benzene Questions and Answers

Predict the major product and draw th e mechanism for the following Friedel Crafts Acylation reactions 0 0 b AICI3 00 0 6 b QO AICI3 Chemistry St Cherry Steps AICI 3 40 42 An

A sunburn prevention agent must be non toxic non staining non volatile reasonability wate soluble It should filter of the burning rays of sunlight Given structure is one such compound Which methods for synthesis of above compound starting from m dimethoxybenzene A 1 Ph COCL n dil NaOH B 1 Cong H1 PC On C F COC sace II D All of these

H H C CIH 3 Select the correct option for stability of following resonance 23 f3st structures Hjal FEI 0 OCH 0 X 1 x y r CH 0 y 2 z y x Z CH 8 0 X 1 x y 3 y x

This is solution of my previous doubt here how do I know which is R and which is R Example for butanoic ethanoic anhydride will butyl or ethyl attach to benzene ring and w hy Ex 1 R O 11 C Anhydride O 1 R 0 R Alel3 R Deylation 14 Ale 3 C R

E CAPS 40 A Chemistry 7 In which of the following reactions product shown is the major product CHO CH NO COOCH3 OH Cl FeCl Conc H SO4 Conc HNO3 Conc H SO4 Conc HNO3 Conc H SO4 CHO CH3 NO NO CI COOCH OH SO H NO

0 52 Match List I with List II List I F P R S NO2 Br Cl O S O CF3 NO CF3 KSH A COO NaNH liq NH3 A R NH A 5 1 2 3 4 List II 1 Addition elimination reaction 2 Elimination addition Reaction 3 SNAr takes place 4 Benzyne intermediate

When naphthalene undergoes an irreversible electrophilic aromatic substitution the major product is the kinetic product which proceeds through the most stable arenium ion intermediate With this in mind draw the curved arrow mechanism for the first step of the electrophilic aromatic substitution of naphthalene with the acylium ion generated from acetyl chloride and AICI Then draw the curved arrows and a resonance structure in step 2 with an unbroken benzenoid ring Draw all atoms electrons and charges if necessary on all structures draw curved arrows on all structures except the last one Do not draw any inorganic byproducts or counterions

18 An organic base X reacts with nitrous acid at 0 C to give a clear solution Heating the solution with KCN and cuprous cyanide followed by continued heating with conc HCl gives a crystalline solid Heating this solid with alkaline potassium permanganate gives a compound which dehydrates on heating to a crystalline solid X is CH NH A C CH 3 H N CH 3 CH 3 NH B D CH 3 NH CH D

7 What is the product of the reaction of 1 mol methyl bromide with 1 mol benzene CH3Br C6H6 a 1 bromo 2 methylcyclohaxa 3 5 diene b 5 bromo 6 methylcyclohaxa 1 3 diene c Bromobenzene d methylbenzene 8 Which catalyst is used in the reaction of benzene with ethyl bromide a FeCl b FeBr c AICI d HgSO4 9 Which statement is correct about the effect of the substituent groups on the strength of alcohols electron withdrawing groups decrease acidity by stabilizing the conjugate base b electron withdrawing groups increase acidity by stabilizing the conjugate base c electron withdrawing groups decrease acidity because they destabilize the conjugate base d electron withdrawing groups increase acidity because they destabilize the conjugate base

Which aryl halide reacts the fastest with NaOEt Br Et Br OEt Br Br

What is a major product of this reaction O SO3H SO3H O OH Fuming H SO4

Which of the following arenes will result in the highest percent ortho product upon reaction with Br of F or N

Which series of reagents would be required to perform the following synthesis O 1 Cl AICI 3 2 CH3CH CH COCI AICI 3 3 NH2NH2 KOH A O 1 CH3CH CH CH CI AICI3 2 Cl2 AICI3 O 1 CH3CH CH COCI AICI 3 2 NH2NH2 KOH A 3 Cl2 AICI 3 O 1 CH3CH CH COCI AICI 3 2 Cl2 AICI 3 3 NH NH KOH A

Trying to attach the aromatic ring Give them missing reactant or reactants please type out your explanation Trying to attach the aromatic ring Give the missing reactant or reactants BOR

Synthesize the target molecule starting from benzene HO H N OH

A beautiful blue copper compound dissolves completely in water Which statement is correct OA The copper compound is the solute and the water is the solvent The solution is homogeneous B The copper compound is the solvent and the water is the solute The solution is homogeneous C The copper compound is the solvent and the water is the solute The solution is heterogeneous D The copper compound is the solute and the water is the solvent The solution is heterogeneous

For full credit write complete sentences to explain your answers Which of the following processes requires more heat energy a raising the temperature of 100 g of water by 10 0 C 5 raising the temperature of 100 g of water by 50 0 C

OA rubidium sulfur OB rubidium sulfide OC rubidium disulfide OD rubidium II sulfide

ii Write the correct IUPAC names OH Q CH CH CH3 A B OCH CH3 C OCH CH OH D OH

C Problem Br H What are Ha and Hb A Enantiomers Hb B Enantiotopic protons C Homotopic protons D Diastereotopic protons E Chemically equivalent D Solution and explanation The answer here would be D diastereotopic protons In order to figure out the relationship between protons a and b you can take the shortcut mentioned above Since there is a chiral center in the molecule the protons bonded to the carbon would not be chemically equivalent As mentioned earlier if the protons are not homotopic or enantiotopic they are not chemically equivalent The opposite of this is true well If they are not chemically equivalent they are neither homotopic or enantiotopic This eliminates choices b c and e Ha and Hb would not be enantiomers because enantiomer term used for isomers not protons If Ha and Hb produced enantiomers during the replace test they would be considered enantiotopic protons Therefore the only option left is d diastereotopic protons

Indicate which sets of reactants when mixed will form a precipitate Na3PO4 aq H SO4 aq BaCl aq LiOH aq NaCIO4 aq Fe NO3 2 aq Li S aq NiCl aq NaCl aq KBr aq

W NaOH 8 RCO H compound a compound b You do not have to consider stereochemistry You do not have to explicitly draw H atoms In cases where there is more than one answer just draw one reagent a compound c

Write the major product for each of the reactions below a b Br Br NaNH DMSO CH3CHBRCHBRCH3 NaNH2 DMSO c Why reaction a does not produce the same functional group produced in h 2

Synthesize produce each of the following Show reagents and products at each step reaction Do not write mechanisms Br Br H C CH CH Br g 00 00

Pick the IUPAC name of the compound shown below OCH CH3 OCH CH O 1 1 diethoxycyclohexane O 1 1 dimethoxycyclohexane O 1 2 epoxycyclohexane O 1 2 diethoxycyclohexane

Br KNO H SO 2 4 H KNO H SO Br Lo 4 NO 2 NO

The major product of the following reaction i AICI 26 CI

The major product of the following reaction is on AICI 0 26 CI

The major product of the following reaction is O O AICI o ob as ar CI

What is the product of the following sequence of reactions A O A OD 0 B Br Fe Br OH h Mg Ether Q3 B OH C 1 0 2 H O OH D OH

Which of the following is an important reactive electrophile in aromatic nitration NO O NO O NO O NO2

The major product of the following reaction is AICI 06 08 CI A

Which nitrogen atom is the most basic A 1 B 2 C 3 D 4 N 1 4 NH

13 27 Predict the products that are expected when each of the fol owing compounds is heated with concentrated HBr 0 0 F c b d

dentify the pr Br OIV CO Il CH OH OH OCH Br OH IV excess HBr heat CH OH Br OH CH Br CH Br

Calculate AH for the reaction below in kJ mol using the values in the table H H H H H CI H F N H N O O H 0 0 F F H H 436 kJ mol 431 kJ mol 567 kJ mol 391 kJ mol 201 kJ mol 463 kJ mol 146 kJ mol 155 kJ mol H H H H H C C H H H Average Bond Energies kJ mol C H 413 kJ mol 348 kJ mol 293 kJ mol 358 kJ mol 485 kJ mol 328 kJ mol 259 kJ mol 242 kJ mol C C C C C 0 0 0 CHO C N N N NEN CON 614 kJ mol 839 kJ mol 799 kJ mol 495 kJ mol 1072 kJ mol 615 kJ mol 418 kJ mol 941 kJ mol 891 kJ mol

56 Which is an intermediate in the reaction of 4 bromotoluene with sodium amide A Br NH B Br NH H H What CH3 CH D CH3 CH3

What is the product for the following reaction HO HO CI H H Ch FeCl HO CI II H CI x HO III O H

Provide a product for the following reaction Select one b ll 111 NH I NH II NaOCI Nal NH NH III I NH IV

Identify the nature of the aromatic ring in nitrobenzene O The ring is neither activated nor deactivated towards electrophilic aromatic substitution relative to benzene O The ring is strongly activated towards electrophilic aromatic substitution relative to benzene The ring is strongly deactivated towards electrophilic aromatic substitution relative to benzene Submit Request Answer

Ethane nitrile with LiAIBr water 1 2 3 Propantiol with undecanoic acid

What reagent or sequence of reagents would best accomplish the transformation below or OH O 1 TsCl pyridine 2 CN DMSO O HCN O 1 SOCI pyridine 2 CN DMSO O NaCN DMSO or CN

7 Using chemical intuition what should be the empirical rate law for the following Diels Alder reaction Justify your answer with a proposed mechanism C diene ethane cyclohexene

Fill up the boxes with the correct compounds 22 points O NH CH3 Last Name First Name List CH NH2

Draw transition state for the rds of the following reactions a Hydroboration of propene b Epoxide formation with MCPA and cis but 2 ene

Toluene C7Hs burns in oxygen to produce carbon dioxide and water How many grams of oxygen are needed for the combustion of 94 5 grams of toluene O2 658 g 295 g O 207 g 148 g

10 2 Draw resonance structures for each of the following radicals the a wwwwwww b c d

18 What reagent s are suitable to carry out the conversion shown OH A C E 1 OsO4 NMO NaBH4 CH3OH 1 03 2 CH3 2S Both B and C OH B 1 03 2 CH3 2S 3 NaBH4 CH3OH D Both A and B

Which mechanistic step s is are shown below Select all that apply Select one or more H transfer Orearrangement 0 5 S O loss of a leaving group O

To produce butyl benzene, what would be a correct approach? treat butyl chloride+AlCl3 with Benzene and then treat with H₂N-NH2 followed by NaOH Treat Benzene with Br2+FeBr3 then treat with Mg, ether, then treat with butanol treat butyl chloride +AICI3 with Benzene Treat CH3CH₂CH₂COCI + AICI3 with benzene and then treat it with Zn(Hg) HCI