.19. 0 Емесных C-H + CH3-OH What is the unstable intermediate formed in the above reaction? OH I -Ç-H OCH3 H H- C-H OCH3 OCH3 C-H OCH3 OCH3 C-CH3 OCH3 O OCH3 C-OCH3 OCH3
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- Which step in the reaction would you expect to be rate-determining? 1. Vicinal diol to intermediate A. 2. Intermediate A to intermediate B. 3. Intermediate B to intermediate C. 4. Intermediate C to carbonyl product.In each of the following three reaction coordinate diagrams, state: (a) Whether the reaction is exothermic or endothermic. (b) Whether the reaction is the slowest, the fastest, or intermediate in rate. (c) If all three reactions have the same entropy change between the reactant and product, which reaction has the largest favorable G0.An elevated level of the enzyme alkaline phosphatase (ALP) in human serum is an indication of possible liver or bone disorder. The level of serum ALP is so low that it is very difficult to measure directly. However. ALP catalyzes a number of reactions, and its relative concentration can be determined by measuring the rate of one of these reactions under controlled conditions. One such reaction is the conversion of p-nitrophenyI phosphate (PNPP) to p-nitrophenoxide ion (PNP) and phosphate ion. Control of temperature during the test is very important; the rate of the reaction increases 1.47 times if the temperature changes from 30 C to 37 C. What is the activation energy for the ALP-catalyzed conversion of PNPP to PNP and phosphate?
- E (kJ-mol") s/d/e/1FAlpQLSSGCE8gt218c6JoHMWME1A8Nydt8M4g1yG93D-2LPpoMij_g/formResponse Question 39: Select the reactions in Figure 39 that can be represented by the accompanying energy diagram? * Reaction A Reaction B Reaction C Figure 39 t (s) CH-C-NH-CH D + HN-H + HO-O HO-H HO HCI CH-CH-CH3 oH + 20° LIFE DigitalRefer to the following reaction mechanism CH-c-OCH, slow + OH fast CH-C-OH CH0 CH,-C-OCH OH fast CH,C-O CH,OH The least stoble transition state has which structure? 8- A. CH,-C-OCH, B. CH3-C 0CH, C. CH,-C-OCH, D. CH, COCH, OHQ27. The gas phase reaction between SiH2 and H20 was studied, and the following mechanism was proposed. M is a buffer gas which takes away energy as heat; you can treat it as a regular reactant. 1) SİH2 + H20 F SİH2-H2O* K 2) SİH2-H2O* + M SİH3OH Assuming that the first step is a pre-equilibrium step and the second step is rate-limiting, derive the rate law for this mechanism.
- Which of the following mechanisms is consistent with the energy diagram shown below: Energy Progress of the reaction A+B ---> C O 2A---> C (fast) B+C -> D (slow) A+B ---> C (slow) C---> D (fast A---> B (slow) B ---> C (fast) C---> D (fast)Energy 7. Consider the following energy diagram: (CH3)3C-OH (CH3)3C-ÕH₂ + HI + r a) Write the overall balanced chemical equation. Reaction coordinate (CH3)3C+ + H₂O + F b) How many steps are in the reaction mechanism? c) How many intermediates are in the reaction mechanism? d) Which step requires the most energy? (say step "X", where "X" is a number) e) CIRCLE ONE ANSWER. The overall reaction is an example of: substitution addition elimination (CH3)3C-I rearrangementPracdne o8 Consider the following reaction co-ordinate diagram H20 H20 Br A D Energy Reaction Co-ordinate a) Identify the various species on the diagram by adding the letter identifying each of the structures. b) Which species does the first transition state of the overall reaction most resemble? What kind of transition state is this? c) Which species does the second transition state of the overall reaction most resemble? What kind of transition state is this?
- The exergonic reaction below involves multiple elementary steps and one of the intermediates in the reaction is shown in square brackets. Which statement is consistent with this reaction? HCI, H2O но OH O This is a rearrangement reaction O The low energy transition state makes the reaction exergonic O The reaction has at least two transition states and the products are lower in energy than the reactants O The intermediate in the reaction must be more stable than the reactants O The reaction has one transition state, and the products are lower in energy than the reactants2NO2(g) + F2(g) -> NO2F(g) H°rxn = -284 kJ/molrxn NO2(g) and F2(g) can reactto produce NO2F(g), as represented above. A proposed mechanism for the reaction has two elementary steps, as shown below. Step 1: NO2 + F2 -> NO2F + F (slow) Step 2: NO2 + F -> NO2F (fast) a.) Write a rate law for the overall reaction that is consistent with the proposed mechanism. b.) On the incomplete reaction energy diagram below, draw a curve that shows the following two details. The relative activation energies for the two elementary steps The enthalpy change of the overall reaction Can all of them be solved please, and thank you very much!Consider the following reaction mechanism. Step 1: 2 X + Y- W + 2 Z fast Step 2: Z- U+ V slow Step 3: V +Z-2 W + Y fast Which of the following is/are the intermediate/s in the given reaction mechanism? O Y only O V only O Z and V O V and Y