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- Predict the product of the following reaction and classify the reaction. Pb(NO3)2+FeSO4--->PbSO4+________In light of your answer to Problem 30-40, explain why a mixture of products occurs in the following reaction:Luminol, which is used by forensic scientists to find blood, fluoresces as a result of Diels–Alder-like process. The dianion of luminol reacts with O2 to form an unstable peroxide intermediate that then loses nitrogen to form a dicarboxylate and emit light. The process is similar to that in 14-21 and 14-22. Propose a mechanism for this process.
- The methoxy group is reported as having σpara and σmeta values that differ in sign (σmeta =+0.12; σpara = –0.27). What specific experiments are performed to determine these s values?Explain why the σpara and σmeta values are of different sign and what those signs indicate.Which of the following reactions result in a positive ∆ Ssys? a. H2O(g) = H2O(l) b. H2(g) + I2(g) = 2 Hl(g) c. C2H2O2(g) = 2CO(g) + H2(g) d. H2O(g) + CO2 (g) = H2CO3(aq)Tunicates are marine animals that are called "sea squirts" because when they are taken out of water, they tend to contract and expel seawater. Lepadiformine is a cytotoxic agent (toxic to cells) isolated from a marine tunicate. During a recent synthesis of lepadiformine, the investigators observed the formation of an interesting by-product (3) while treating diol 1 with a reagent similar in function to PBr3 (J. Org. Chem. 2012, 77, 3390–3400):
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