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- The following figure shows the energy profile of a nucleophilic substitution reaction. Potential energy :ÖH H HII.C H C-1 H HO--C---I HH Reaction coordinate H -CH HO–CHITH H + 1 According to this, it is correct to affirm: O The activation energy (4G°) shows that it is thermodynamically favorable. O Represents a reaction that occurs in one step where a pentavalent chemical species is formed. O The intermediate has lower energy than any transition state. O The formation of the intermediate releases energy and is therefore thermodynamically favourable.Mechanism: A reaction mechanism for the following reaction is shown below. H+ CEN CEN: N-H || -C-OH H₂O, H* Step 1 wand woled mot ozsm E Step 3 N-H C-OH C=N-H Step2 C=N-H H-O-H H₂O motno vgiene fesrigid onlt to smotnos -C=N-H a) The overall reaction is an example of b) Step 1 is c) Step 3 is d) Draw in the curved arrows for each step. e) Identify the nucleophiles and electrophiles where appropriate. f) Fill in the reaction energy diagram. H₂O: rate determining step to noipojovo hamwell sit 5(emise erit voittons 10) vanas mi sdgin al rainW di of E^ reaction progress →Describe the mechanism of the following reaction. 1) H2N NH2 (excess) SH SH `CO2H AcO 2) КОН 3) H +
- Identify the expected major product of the following electrocyclic reaction. → OI Oll O III OIV OV A ? KYYAK 8 +En ||| + En I || IV + En VSuggest a plausible mechanism for the reaction shown below Ie -Mo OC -Mo OC Br Hint: The first step is a unimolecular reaction C + BrHow many acid-base steps occur in this mechanism? :OH fö OH ₂ H CI: -H₂O (C5H12O) (CsH3O*) :CI: :CI:- yox (C5H1*) (C5H₁1CI)
- Plastic photochromic sunglasses are based on the following reversible rearrangement of a dye inside the lenses that occurs when the lenses are exposed to sunlight. The original dye absorbs UV light but not visible light and is thus colorless, while the rearrangement product absorbs visible light and is thus darkened. (a) Show the mechanism of the rearrangement. (b) Why does the rearrangement product absorb at a longer wavelength (visible light) than the original dye (UV)?OMe O OMe mechanism requires PdCl₂ (cat) A CUCI, O₂ H₂OConsider the following mechanism for the reaction between t-butyl chloride and water: + (CH3),CCl(aq) - (CH3), С"(аg) + СІ (aq) (1) 3 CH3)¸c*(aq) + H,O) → (CH3),CHOH*(aq) (2) 3 + + (CH3), CНОН" (аq) + H,O() — (CH), СОН(аq) + H,о "(aq) (3) Write the chemical equation of the overall reaction: yes 0,0,.. Are there any intermediates in this mechanism? no If there are intermediates, write down their chemical formulas. Put a comma between each chemical formula, if there's more than one. O O