X Xc Which is a step in the mechanism of the following reaction? RCOH + CH3OH H RCOCH3 + H2O 0 H-O CH R-COH + CH3OH R-C-OH HOCH3 0 R-C-OH + CH3O e 0 B @ O Ө 0 R-C-OH OCH3 e RC OH + CH3OH RC + OH Θ e O R-C-OH + CH3OH → R-C-OH HOCH 3
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- Which mechanism is consistent with the reaction below?2NO+2H2→N2+2H2O 1. NO+H2→NOH22. NOH2+NO→N2O2+H23. H2+ N2O2→ N2+H2O 1. NO+H2→N+H2O2. NO+H2→N+H2O 1. NO+H2O→NO2+H22. NO2+H2→N2+H2O 1. 2NO⇄N2O22. N2O2+H2→N2O+H2O3. N2O+H2→N2+H2OWhich of the following reactions result in a positive ∆ Ssys? a. H2O(g) = H2O(l) b. H2(g) + I2(g) = 2 Hl(g) c. C2H2O2(g) = 2CO(g) + H2(g) d. H2O(g) + CO2 (g) = H2CO3(aq)Which overall reaction is consistent with the reaction mechanism below? (CH3)3CBr→(CH3)3C++Br- (CH3)3C++OH-→(CH3)3COH (CH3)3CBr+ OH-→(CH3)3COH+Br- (CH3)3C++Br-→(CH3)3COH (CH3)3CBr+OH-→(CH3)3C++(CH3)3COH (CH3)3C++OH-→(CH3)3COH
- Predict the products and mechanisms of the following reactions. When more than oneproduct or mechanism is possible, explain which are most likely.(a) 1@bromohexane + sodium ethoxide in ethanol(b) 2@chlorohexane + NaOCH3 in methanol(c) 2-chloro-2-methylbutane + NaOCH2CH3 in ethanol(d) 2-chloro-2-methylbutane heated in ethanol(e) isobutyl iodide + KOH in ethanol>water(f) isobutyl chloride + AgNO3 in ethanol>waterPredict the products and mechanisms of the following reactions. When more than oneproduct or mechanism is possible, explain which are most likely.(a) 1@bromohexane + sodium ethoxide in ethanol(b) 2@chlorohexane + NaOCH3 in methanol(c) 2-chloro-2-methylbutane + NaOCH2CH3 in ethanol(d) 2-chloro-2-methylbutane heated in ethanol(e) isobutyl iodide + KOH in ethanol>water(f) isobutyl chloride + AgNO3 in ethanol>water(g) 1@bromo@1@methylcyclopentane + NaOEt in ethanol(h) 1-bromo-1-methylcyclopentane heated in methanolWhen the following reactions are carried out under the same conditions, the rate constant for the first reaction (kH) is found to be 7 times greater than the rate constant for the second reaction (kD). What does that tell you about the mechanism of the reaction? (Hint: a C¬D bond is 1.2 kcal/mol stronger than a C—H bond.)
- What is the mechanism of the following reaction? B2H6 + O2 --> B2O3Predict the products and mechanisms of the following reactions. When more than oneproduct or mechanism is possible, explain which are most likely.(a) 1@bromohexane + sodium ethoxide in ethanol(b) 2@chlorohexane + NaOCH3 in methanol(c) 2-chloro-2-methylbutane + NaOCH2CH3 in ethanol(d) 2-chloro-2-methylbutane heated in ethanolPredict the products and mechanisms of the following reactions. When more than oneproduct or mechanism is possible, explain which are most likely. ) 1@bromo@1@methylcyclopentane + NaOEt in ethanol
- For the gas phase isomerization of isopropenyl allyl ether, CH2=C(CH3)-O-CH2CH=CH2-->CH3COCH2CH2CH=CH2 the rate constant at 405 K is 2.60x10^-5 s^-1 and the rate constant at 440. K is 4.75x10^-4 s^-1. The activation energy for the gas phase isomerization of isopropenyl allyl ether is ________ kJ.Identify the nucleophile that attacks the carbocation intermediate in the acid catalyzed hydration is shown A. HO- B. H2O C. H+ D. H3O+Acetic anhydride reacts with water in the following manner: CH3C(O)-O-C(O)CH3 + H2O = 2CH3CO2 If this reaction is carried out in an inert solvent with low concentrations of both acetic anhydride and water, it follows the rate law rate = k [CH3C(O)-O-C(O)CH3] [H2O] with a rate constant of 0.0035 s-1. However, if low concentrations of acetic anhydride are placed in pure water, it follows the rate law rate = K [CH3C(O)-O-C(O)CH3] where K = 0.1944 s-1. Explain why this is happening.
