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- Describe the mechanism of the following reaction. 1) H2N NH2 (excess) SH SH `CO2H AcO 2) КОН 3) H +13518. IIIa) propose a reasonable mechanism/arrow pushing for the following reaction: R C 0-0 R N R RPlastic 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)?
- Provide the mechanism for the following reaction (1) PhMgBr (2 equiv) (2) H3O+ workup OHDraw a plausible mechanism for the reaction shown below. Determine the major product and provide explanations for each step in the mechanism. HCI + one mole HO CH--CH>-ОН gasThe first step in the mechanism for the reaction shown below is_ Substitution Deprotonation Nucleophilic attack Protonation O O O O
- In the presence of light or heat, diazomethane (CH,N2) creates a carbene, which then adds to an alkene to make a cyclopropane. In the boxes below. draw the mechanism arrows for the reaction. H INEN: INE N: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 →Voltooi die volgende reaksie en stel 'h meganisme voor. Complete the following reaction and propose a mechanism. 1) CO2, P, A 2) H20, H*