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- Which reaction will be the fastest? ОНС. OHC. A: ОНС. ОНС. B: ОНС ОНС МеO. MeO С: Me Me D: ОНС. ОНС. E: ОНС ОНСE (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 DigitalName of reaction? Reaction mechanism? m) n H₂ 1. LAHY 2.H30+ NN
- Please explain why this reaction will NOT WORK. 1. Br2, FeBr3 2. AICI3, CI Br-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…Q27. 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.
- Considering both the forward and reserve directions, which step has the smallest rate constant in the reaction coordinate diagram shown below? F B E A E going to G O A going to C O E going to C O C going to E C going to A G going to E8. Compound (A) rearranges to compound (B) spontaneously. a) Draw the mechanism using curved arrows, that describes how this rearrangement can occur. (Hint: two shifts are required to obtain the product). 3 I. H Br H3C Br mago b) What makes the formation of the previous product spontaneous (ie. why is the product more stable than the reactant)?5. Which of the following reactions depicted in the reaction coordinate diagrams will most likely proceed at the fastest rate? Free Energy Answer 'F' if they all proceed at the same rate. Answer: Answer 'G' if there is no way to tell. A C B P урок P S Briefly Explain: puny P Reaction Progress D E P
- U R V Reaction progress i. The rate-determining step of the reaction is ii. By Hammond's postulate, the rate of reaction will • if the intermediate T is stabilized (the energy of T is reduced). Gibbs Free Energy20 Proposed mechanism for a reaction is O3 + NO2 ------------> NO3 + O2 slow NO3 + NO2 ---------> N2O5 fast What are the intermediates in the proposed mechanism? a. O3 b. NO2 c. N2O5 d. NO31) Н—С—-Н 2) CH2 3) 4) 5) 6) он На, Pt NANH2 HаОг, NaOH, H0 CH;Br H2, Lindlar's catalyst CrOз, H>SO4, HzO снCH,Br NaBH, NaOH CH;CH2CH;Br Вн-THF