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- 2. The following reaction results in two possible carbocation rearrangement products, each of which can be characterized by a change in the ring size. Give structures for both products. There is no need to show the mechanism of the reaction. HCI (conc)Give the mechanism of the following reactions. Briefly explain why any selectivities occur. 1 eq HBrstion 18 Which of the following Grignard reactions would not lead to the alcohol product below? (b) OH BrMg CH₂MgBr (c) (d) MgBr MgBr od od
- 5. a) When the molecule below is treated with HCI, the product distribution shown is obtained. Use curved arrow formalism to draw a mechanism for this process. Account for the product distribution and draw resonance structures for the intermediate that leads to the major product. The m HCI CI + s 1o(29nil no awa eib ys leldwsio (2tniog 01).E (15 % CI2 tw ledsl< 1% lad olualom 85 %Draw the predicted major products of the following reactions. Ph OHC., (PhP);RhCI PHCN, A H,CCH, Grubbs I, CH,OCl, Rh(CO),CI CO R-0 B(OH)2 Pd(OAc)2 K3PO4 Pd(OAc)2 K3PO4Propose a plausible mechanism (with electron pushing arrows) HCI HO, Predict the product of the following reaction: NBS, heat Draw a complete mechanism and predict the product for the following reaction: HNO3, H2SO4