Energy m Reaction Coordinate a. This reaction coordinate diagram is consistent with which mechanism (E1 or E2)? b. What order would the rate expression be for this reaction (i.e first, second, third, zero)? c. Which of the following molecules could NOT be involved in a reaction that had this reaction coordinate diagram (answer a, b,

Energy m Reaction Coordinate a. This reaction coordinate diagram is consistent with which mechanism (E1 or E2)? b. What order would the rate expression be for this reaction (i.e first, second, third, zero)? c. Which of the following molecules could NOT be involved in a reaction that had this reaction coordinate diagram (answer a, b,

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter14: Elimination

Section: Chapter Questions

Problem 18CTQ

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1. Answer the following questions on the reaction coordinate diagram pictured below. Reaction Progress a. Label AG on the diagram above. b. Label the reactants, products, transition state(s), and intermediate(s). c. How many steps would the mechanism of this reaction have?
3 Consider the following reaction that progresses via a unimolecular substitution nucleophilic (Sn1) reaction mechanism. CH3 Н. H CH3 CH3 :OH- Br + Br- HO-C H3CH2C H3CH,Č CH2CH3 Clearly draw a fully labelled energy profile diagram which depicts the reaction described above. Assume the overall reaction is exothermic. Ensure you include on your diagram : • Intermediate States Transition States Energy Changes Rate Determining Steps Activation Energies
Answer the following questions regarding the reaction coordinate diagram below. im Reaction Coordinate a. This reaction coordinate diagram is consistent with which mechanism (E1 or E2)? b. What order would the rate expression be for this reaction (i.e first, second, third, zero)? c. Which of the following molecules could NOT be involved in a reaction that had this reaction coordinate diagram (answer a, b, c, or d)? Br a. b. ta CI Br d. C. Br d. This reaction coordinate diagram corresponds to a mechanism with Energy steps.
2. The bromination of 2-butene is an exergonic reaction. H3C + HC. CH, Br. CH Br a. Draw the mechanism for the reaction (you may ignore the stereochemistry for this question). b. In the mechanism drawn above, identify any intermediates. Progress of the reaction Progress of the rea ction c. How many transition states are involved in the above mechanism?. Without drawing the transition state(s), indicate where they occur in the mechanism. Each step of the mechanism of reaction involves a transition state, therefore, Here there are two transition states, each with its own activation energy. d. Which of the following reaction co-ordinate diagrams best illustrates this reaction?.Explain briefly, On the diagram, draw the structures of the reactants, products and intermediates at the correct locations on the diagram and indicate which position(s) correspond to the transition Progress of the readion Progress of the reaction state(s).
I. The following mechanism has been proposed for the formation of N2 and H2O from H2 and nitrogen monoxide. Step 1 2 NO N2O2 (fast, equilibrium) This is reversible Step 2 N2O2 + H2 N2O + H2O (slow, RDS) This is not reversible Step 3 N2O + H2 N2 + H2O (fast) This is reversible a. What is the overall reaction for this mechanism? b. What are the intermediates if any are present? c. Write a rate law for each step of the mechanism and list the molecularity of each step. Be sure to include any reversible steps as well. d. What is the predicted rate law for this reaction? Be sure to show all your work to receive credit. e. What are the expected units for k if time was in units of seconds. II.The following reaction has a rate constant of 0.760s-1 at 1000. K and a rate constant of 0.870s-1 at 1030. K. What is the activation energy for this…
SECTION 6: Show the mechanism of each reactions with arrows and intermediates form as in a. b. C. HBr Br₂ Cl₂, H₂O Br Br CI Br OH
El E2 Example Reaction Equation Rate Law Energy Diagram Why El or E2? Explain
2. The bromination of 2-butene is an exergonic reaction. Br H3C. Br2 CH3 CH3 Br a. Draw the mechanism for the reaction (you may ignore the stereochemistry for this question). b. In the mechanism drawn above, identify any intermediates. C. How many transition states are involved in the above mechanism? Without drawing the transition state(s), indicate where they occur in the mechanism. d. Which of the following reaction co-ordinate diagrams best illustrates this reaction? Explain briefly. On the diagram, draw the structures of the reactants, products and intermediates at the correct locations on the diagram and indicate which position(s) correspond to the transition state(s). Page 18 of 19 EYRERIMENT 7: BROMINATION OF CINNAMIC ACID WINTER 2022
Which of the following represents the transition state of the rate- determining step in the substitution reaction between tert-butyl bromide and methanol? H3C CH, H,C CH, Br sOc--------Br 1 H3C 2 H3C CH: CH3 H3C CH, Br -Br а. 1 b. 2 с. 3 d. 4 a O b
Refer to the folowing reaction mechanism: O' CH3-C OCH, OH slow CH, C-OCH fast CH,-C-OH CH,0 OH fast CH,C O CH,OH The least stoble transition state hos which structure? A CH-C-OCH, B. CH, C OCH, C. CH,-C-OCH, D. CH, COCH, OH OH ansaer Tme let 037 Refer to the tollowing reaction mechanium CH, coC, fast • OH CH C-OCH slow Нс он * сно fast CH,C-O CH,OH The most stable intermediate is A CH C осн, в сн, с осн, с. сн C.CH, C-OH D.CH-C-0 OH han songerto conp becouse on 14 Pyridine is a stronger base than pyerole because ered H. d out of eon pyridine 1H-pyrrole ione pair in pyridine is locolized. lone poir in pyrtole in locakzed Nrogan in pytidine is sp hybridirea ntrogen in pymole is sp'nybndced 15 the seoction eiow is on omple of whot hpe of oegoriC eaction? O nitrogen in pyrrole is sp hybridized. The reaction below is an example of what type of organic reaction? H2C=CH2 Br/CC4 BRCH,CH,Br +1 OElectrophilic Substitution CNucleophilic Substitution O Bimination ONucleophilic Addition…
17. The rate-determining step for a chemical reaction that proceeds by multiple mechanistic steps, is the step: a) with the highest energy transition state. b) with the largest activation energy. c) with a transition state that looks like the starting material for the mechanistic step. d) with a transition state that looks like the product for the mechanistic step.
The following is a nucleophilic substitution reaction of S-3-chloro-2-methylhexane with "CN. The experimental rate law for this reaction is Rate k [S-3-chloro-2-methylhexane] CH3 H;C. C. C H. CH3 CEN H2 H. The mechanism for this reaction is SN1 Draw the orgamic molecule(s) which is(are) formed in this reaction. Do not include molecules like H,O or HCl. Draw the specific configuration (R or S) at any chiral carbons within your product(s). If both configurations are formed in the product(s), draw both as separate molecules/products.