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- 5.40. Give plausible products (or just one product) for each of the following reactions, or tell if no reaction is expected. (a) PDSO, + MgS > (b) (CH,),Hg + CaF, → 1. 1.21:15 20. Provide the major product of the following reaction. If no reaction occurs, write "n.r." NO₂ CH₂CI, AICI (if o,p-substituted products are possible, only provide the major para-substituted product, otherwise, only provide the meta-substituted product) Send a chat C(b) acid, HNO3 to produce compound L. The reaction of compound L with bromine, Br2 in the presence of iron tribromide, FeBr3 produced compound M. Benzene also undergoes Fridel-crafts alkylation reaction with chloroethane, CH;CH2CI using catalyst N to produce compound P. Benzene, CeHe undergoes substitution reaction with concentrated nitric Benzena, CsHe menjalani tindak balas penukargantian dengan asid nitrik, HNO, pekat untuk menghasilkan sebatian L. Tindak balas sebatian L dengan bromin, Brz dengan kehadiran ferum tribromida, FeBrs menghasilkan sebatian M. Benzena juga menjalani tindak balas alkilasi Fridel-crafts dengan kloroetana, CH3CH2CI dengan menggunakan pemangkin N untuk menghasilkan sebatian P. (i) Draw the structural formula of L, M and P. Lukiskan formula struktur bagi sebatian L, M dan P. (ii) State catalyst N. Nyatakan pemangkin N. (iii) Show the formation of electrophile that will be reacted with benzene for the formation of compound P.
- 22:43 10. Provide the following: the resonance structure of the intermediate that can resonate into the other intermediate that is given the product that results from the given resonance structure Specify which product is the kinetic product and which is the thermodynamic product . OH 50% H₂SO4 H~(a) Aniline is oxidized and then resulting product is boiled with Conc. HNO3 and conc. H2S04. (b) Cyclopentylnitrile is reduced with LIAIH4 and the resulting product reacts with benzenesulphonylchloride (c) 2-Chloro-5-methyl-diethylhexandioate is condensed in alkaline medium (d) 2-Methylethylpropanoate is condensed with phenylbenzanoate in an alkaline medium (e) When Ethanoic is heated with NH3 and resulting product reacts with benzoylchloride.(a) Account for the following :(i) CH3CHO is more reactive than CH3COCH3 towards reaction with HCN.(ii) Carboxylic acid is a stronger acid than phenol.(b) Write the chemical equations to illustrate the following name reactions:(i) Wolff-Kishner reduction (ii) Aldol condensation (iii) Cannizzaro reaction
- (c) Treating lactone B with two equivalents of phenylmagnesium bromide, followed by hydrolysis in aqueous acid, gives a compound with the molecular formula C18H22O2, as shown below. Propose a structural formula for this compound. 1. PhMgBr (2 eq.) 2. H'/H>O C18H2202 bj 1o 14 10I f6 40 & 3 4 00 (8)(d) For the following reaction give the structure of the heterocyclic product formed and give a mechanism to explain its formation. Pd(PPH3)4 Ph Et,N riddygive the mechanism of the following reactions and explain why any selectivities occur.
- From the given structures which is(a) an acid halide? (b) a secondary amide (c) an aldehyde incapable of self-aldol consensation?7B. (2 reactions (should clearly indicate the stereochemistry). Draw the structure of the product, substrate or condition in the following (a) ОН (b) Ме 1) OsO4 2) NaHSO3 (c) 1) (sia)2BH 2) NaOH/H2O2 H20(a) When (Z)-3-methylhex-3-ene undergoes hydroboration–oxidation, two isomericproducts are formed. Give their structures, and label each asymmetric carbon atomas (R) or (S). What is the relationship between these isomers?(b) Repeat part (a) for (E)-3-methylhex-3-ene. What is the relationship between the productsformed from (Z)-3-methylhex-3-ene and those formed from (E)-3-methylhex-3-ene?