The reaction of tert-butyl bromide with azide ion (N3-) in methanol is a typical SN1 reaction. What happens to the rate of the reaction if [N3-] is doubled?
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The reaction of tert-butyl bromide with azide ion (N3-) in methanol is a typical SN1 reaction. What happens to the
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- When the alkyl bromides (listed here) were subjected to hydrolysis in a mixture of ethanol and water (80% EtOH/20% H2O) at 55 °C, the rates of the reaction showed the following order: (CH3)3CBR > CH3Br > CH3CH2Br > (CH3)2CHBR Provide an explanation for this order of reactivity.The reaction of bromomethane with azide ion (N3-) in methanol is a typical SN2 reaction. What happens to the rate of the reaction if [N3-] is doubled?Peroxides are often added to free-radical reactions as initiators because the oxygen–oxygen bond cleaves homolytically rather easily. For example, the bond-dissociation enthalpy of the O¬O bond in hydrogen peroxide (H¬O¬O¬H) is only 213 kJ>mol (51 kcal>mol). Give a mechanism for the hydrogen peroxide-initiated reaction of cyclopentane with chlorine. The BDE for HO¬Cl is 210 kJ>mol (50 kcal>mol).
- (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?What is the rate determining step for the reaction below? 0046 - 00905 + Hoy H IB کار تلوی 0 '애 + ation A B C D دو Acylium lon 0 COH + Multiple Choice: Only one answer is correct, and only one answer can be selected.CH3 CH3 Br- Br2 CH2CI2 CH3 CH3 H3C 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 CH2C12. 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 CH3 CH3 Br- .CH3 .CH3 H3C H3C :Br :Br:
- In an SN2 reaction between 2-chlorobutane and iodide ion, what happens to the rate of the reaction if: (a) the concentration of 2-chlorobutane is doubled? (b) the concentration of iodide is doubled?The bromination of aceton is acid –catalyzed. CH3COCH3 + Br2 + H+ ---------> CH3COCH2Br + 2H+ + Br- The rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H+ ion at a certain temperature. A B C [ CH3COCH3] [Br2] [ H+] Rate of disapperance [ Br2] 0.30 0.050 0.050 5.7 x 10 -5 0.30 0.10 0.050 5.7 x 10 –5 0.30 0.050 0.10 1.2 x 10 -4 0.40 0.050 0.20 3.1 x 10 -4 Write the rate law. Find the rate constant. Determine the half-life of the reaction if the [A]o = 0.50M ; [B]o = 0.40 M; [C]o = 0.6 M. ( Half-life is based on over all order of the reacaction)Consider the attached SN2 reaction. Question: What happens to the reaction rate in each of the following instances? [1] The leaving group is changed from Br− to I−; [2] The solvent is changed from acetone to CH3CH2OH; [3] The alkyl halide is changed from CH3(CH2)4Br to CH3CH2CH2CH(Br)CH3; [4] The concentration of −CN is increased by a factor of five; and [5] The concentrations of both the alkyl halide and −CN are increased by a factor of five
- Which step in the mechanism for free-radical bromination of propane is rate-determining? O Br-Br 2 Br O (CH3)2C-H+ Br→ (CH3)2C + HBr O (CH3)2C + Br-Br (CH3)2CBr + Br. O (CH3)2C + Br. → (CH3)2CBr7. What is the effect of doubling the concentration of both the alkyl halide and the alcohol in the following S1 reaction: (CH₂) CBr + CH₂OH (A) No change in the rate. (B) Doubles the rate. (C) Triples the rate. (D) Quadruples the rate. (E) None of the (A) to (D) choices is correct. (CH3),COCH, + HBr5-The hydrolysis of a series of ethyl benzoates by hydroxide ion in 85% aqueous ethanol has been investigated. A Hammett plot of the second order rate constants (K) gave a reaction constant p = 2.56. Calculate how much faster ethyl 4- nitrobenzoate will undergo base catalyzed hydrolysis compared to ethyl benzoate under similar conditions. O,N