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- Define the Mechanism- Addition of H and BH2—Hydroboration ?I. Molecular rearrangementsA) How are 1,2-hydride shifts in carbocation intermediates formed during SN1 or E1-type processes? How are carbocations formed by treating alcohols with water? How can you predict when a hydride shift will occur and how can you show it using arrow-pushing strategies?(a) A compound known to be a substituted cyclohexanone derivative has lamda max of 235 nm. Could this compound be a conjugated dienone? explain (b) (i)For this compound, how many nm must be accounted for by substituents? (ii) What are the substituents and the points of substitution that may occur having accounted for the 20nm?
- Which is higher in energy? Q.) Infrared radiation of 1715 cm-1 or of 2800 cm-1?When Br2 is added to buta-1,3-diene at -15 °C, the product mixture contains 60% ofproduct A and 40% of product B. When the same reaction takes place at 60 °C, theproduct ratio is 10% A and 90% B.(a) Propose structures for products A and B. (Hint: In many cases, an allylic carbocationis more stable than a bromonium ion.)This is an example of a [1,3] sigmatropic rearrangement. Can someone explain how this is 1,3 (number the carbons) and draw the anion / cation transition state
- Give detailed answer- Provide example of compound that fulfil each criteria below. Explain why-A)1,2-disconnectionB)1,4-disconnectionC)1,5-disconnectionD)1,6-disconnectionThere is a different, thermally allowed cycloaddition of two butadiene molecules. Showthis reaction, and explain why it is thermally allowed. (Hint: Consider the dimerizationof cyclopentadiene.)15-13 UltravioletThe molecular formula of unknown compound B is C10H16.Quantitative brominationof a 0.473-g sample of compound Brequired 48.22mL of a 0.216MBr2/CCl4to produce a color change. How many rings and pi bonds does compound Bcontain?Include any explanations/calculations to justify your answers.
- at 25C, which of the following reactions of PbS and H2O2 is more favourable?1) PbS + 4H2O2 -> SO2 + PbO2 + 4H2O2) PbS + H2O2 -> PbSO4 + H2OArrange the following reactions in order of increasing ΔrxnS and briefly explain your reasoning. a) S(s)+O2(g)⟶SO2(g) b) H2(g)+O2(g)⟶H2O2(ℓ) c) CO(g)+3H2(g)⟶CH4(g)+H2O(ℓ) d) C(s)+H2O(g)⟶CO(g)+H2(g)Arrange the following reactions in order of increasing ΔrxnS and briefly explain your reasoning. a) S(s) + O2(g) ⟶ SO2(g)b) H2(g) + O2(g) ⟶ H2O2(ℓ)c) CO(g) + 3 H2(g) ⟶ CH4(g) + H2O(ℓ)d) C(s) + H2O(g) ⟶ CO(g) + H2(g)