Benzene was treated with hot a mixture of the bromo compound (A) and aluminum bromide (AIBr3). Upon work up, the bromo derivative B was obtained in high yield in this Friedel-Crafts alkylation reaction. AlBr CH3 +1-19. † H&C A Br H₂C H B CH₂ True False
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- A nitrile X is treated with LIAIH4 to obtain compound Y(C2H¬N). In a separate reaction, X is hydrolyzed in an acid medium to obtain Z. The product obtained after mixing Y and Z will be A. CH;CONHCH2CH3 B. CH3CH2CONHCH2CH3 C. (CH3COO)(CH;CH;NH3*) D. (CH3CH2CO0)(CH;NH2*)Which set of reagents would be appropriate to synthesize bromobenzene from benzene? O 1. HNO3 in H2SO4; 2. H2CrO4 and heat O 1. H2CrO4 and heat; 2. H2 Pd/C O Br2 and FeBr3 O 1. CH3CH2CHCI and AICI3; 2. H2CRO4 and heat O4B12 and Fe O Heat and Br2 OBR2, HCIa) Provide a mechanism that accounts for the product formed in the following reaction. OH CH H" ► 1-ethoxy-1-methyleyclohexane + CH,CH,OH b) Show the structure of the product(s) formed in the following reaction and write the mechanism for the reaction. OH CH + (CH;);COH
- For each compound, give the product(s) expected from (1) HgSO4>H2SO4@catalyzedhydration and (2) hydroboration–oxidation.(a) hex-1-yneThe Zeisel method is an old analytical procedure for determining the number of methoxyl groups in a compound. A weighed amount of the compound is heated with concentrated HI, ether cleavage occurs, and the iodomethane product is distilled off and passed into an alcohol solution of AgNO3, where it reacts to form a precipitate of silver iodide. The Agl is then collected and weighed, and the percentage of methoxyl groups in the sample is thereby determined. For example, 1.06 g of vanillin, the material responsible for the characteristic odor of vanilla, yields 1.60 g of Agl. If vanillin has a molecular weight of 152, how many methoxyl groups does it contain?The carbocation electrophile in a Friede1-Crafts reaction can be generated by an alternate means than reaction of an alkyl chloride with AlCl3. For example, reaction of benzene with 2-methylpropene in the presence of H3PO4 yields tert-butylbenzene. Propose a mechanism for this reaction.
- Which is the MAJOR product of the following reaction? Et 1) BH3:THF 2) H2O2, NaOH Which of the following best describes a key step in the mechanism for the reaction below? HO ... CH3 -CH3 dihydroxylation + en H3C- H3C- HO. electrophilic addition reaction to form a carbocation intermediate B nucleophilic attack by an alkene to form a cyclic (epoxide) intermediate elimination reaction by abstraction of a beta-hydrogen D free-radical substitution at the carbonyl carbon Which alkene will produce the HIGHEST yield of the alkyl halide below? Br. alkene HBr |Draw the complete structures of compounds A thru H in the following synthesis of trans-1- cyclohexyl-2-methoxycyclohexane. Draw the structure of trans-1-cyclohexyl-2- methoxycyclohexane. Include the structure of MCPBA. concd HBr heat + D final product (1) Hg(OAc),, CH;OH Mg. ether (2) NaBH, C OH H2SO, МОРВА (1) E Na F H. heat (2) H;O12. Give the major organic product(s) of the following reactions or sequences of reactions. a) b) c) COOH CH3 + H3C- OH CH3 1. LIAIH4, ether 2. H3O+ H 1. NaBH4, ethanol 2. H3O+ + NaH
- #16f. Provide the missing reactants, reagents, or products for the following reaction sequences below.For each compound, give the product(s) expected from (1) HgSO4>H2SO4@catalyzedhydration and (2) hydroboration–oxidation.(a) hex-1-yne (b) hex-2-yneBr Brz CH3 CH3 H3C CH2CI2 H3C Br Electrophilic addition of bromine, Br2; to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH,Cl). In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions Br: :Br: .CH3 H3C H3C CH3 Br: