5. In the reaction below, only one of the alkenes react. Predict the product of the reaction and comment as to why the selectivity for one of the double bonds is observed. OMe CH2l2 Zn-Cu Me
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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 HOThe following halide reacts differently with hydrogen sulfide as shownshown in the attached image reactions. For each reaction, show the mechanism, draw the energy diagrams for the formation of each product and write the rate equation for the formation of each product. PD: mechanisms are SN1,SN2,E1 etcBr 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:
- 9. The four compounds listed below undergo SN1 reactions at increasingly faster rates. For each compound, provide the contributing resonance forms for the carbocation intermediate that would be formed. Explain why the resonance forms provide information about the rate differences. Br eloo esnsib to0 018-terl (V-) woled bew Br TII ỌCH3 VI Br efin 8 to muloage AMA H ar ni ese of oaqe uoy bluow 6uleot iedW 8 Snoltone gaiwollot erl of 18 Br oubog toom) (blsitrwob) blall wol ta anoloiq olemots yino ed bluow enerfT A Jolduch.a.ed.bluow.nodhsa.ailysad ad no anotong onl tot leipie enT 8 Jolght s od bluaw anoioiq lytom er tot lenpie erdT Jolduob s ed bluow anoto anegotbyd S yino not olsigatni bhiow anolong lydlam arl hol langiae enT3The rate law for the reaction of HO- with tert-butyl bromide to form an elimination product in 75% ethanol/ 25% water at 30 °C is the sum of the rate laws for the E2 and E1 reactions. What percentage of the reaction takes place by an E2 pathway when [HO-] = 5.0 M? (k2 = 7.1 x 10-5, and k1 = 1.5 x 10-5)6. Predict-the-Product Draw the structure(s) of the major organic product(s) formed in the following reactions. Please indicate stereochemistry where appropriate. Ph3P ht
- Draw the major organic product of the reaction shown below. -OH 3) K₂Cr₂O7 H₂SO4, H₂O 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. Ⓒ Sn [F ? ChemDoodleⓇ 6a10. practice q 10 Compound Free Energy HO A A reacts with B in the presence of sodium hydride to give C as a major product. NH₂ Ph B ŌSO₂CF3 NaH, THF a) Provide a detailed mechanism for the formation of C and draw it in the box above. ( C b) Draw the reaction coordinate diagram of that reaction. Indicate with an arrow the rate- determining step of the reaction then draw its transition state: Reaction Coordinate c) The reaction rate observed was 5 x 10-2 M.s¹ when the concentrations of A and B were 0.2 M and 0.1 M respectively. Determine the rate of this reaction when the concentration of A and B are now 0.3 M and 0.2 M respectively. Show your work.7. In the reactions below predict if the major process is SN1, E2 or SN2 and then write the major product formed. a) NaOAc, HOAc solvent -CH3 b) Na-O-C(CH3)3 in DMSO slovent c) d) Br Br -CH3 Br Br NaN3, THF solvent LDA, THF solvent
- 9) Provide the major product(s) of the following reaction and the corresponding mechanism. NH₂ HNO; H₂SO46. Provide the structure for the major product formed when the molecule drawn below is treated with each of the following reagents. No need to show the stereochemistry of the product. H₂ Ni 50% H₂SO4 H₂O | 2. Zn, H₂O HBr HOOH HCI7. (@) Provide the major organic product of the reactions below. (i) CH3 1. TsCl, pyridine OH 2. *BuOK, A