Identify the electrophilic atom in each of the molecules below and draw a mechanism for a reaction with a generalized nucleophile (Nu) giving the structure of the product in each case.
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- It is not uncommon for organic chemists to prepare acetals by an exchange-type process known as transacetalization. Predict the product(s) and show the mechanism for the transacetalization reactions below.Please explain the synthesis. Identify SN1, SN2, E1, E2, nucleophiles and ekectrophiles.Illustrate the resonance effect of the methoxy group -OCH3, on the structure of the benzene ring. Draw all the oissuvke resonance forms of methoxybenzene, including the hybrid Based on the structures, explain how the presence of the -OCH3 group affects: (i) the reactivity of the benzene ring towards electrophilic attack (ii) the orientation or point of attack of an incoming electrophilic reagent on the benzene ring.
- For each reaction, give the expected substitution product, and predict whether the mechanism will be predominantly first order (SN1) or second order (SN2). (a) cyclohexyl bromide + methanolFor each reaction, give the expected substitution product, and predict whether the mechanism will be predominantly first order (SN1) or second-order (SN2). (a) isobutyl bromide + sodium methoxideFor each reaction, give the expected substitution product, and predict whether the mechanism will be predominantly first order (SN1) or second-order (SN2). (a) cyclohexyl bromide + sodium ethoxide
- b) Listed below are several hypothetical nucleophilic substitution reactions. None is synthetically useful because the product indicated is not formed at an appreciable rate. In each case provide an explanation for the failure of the reaction to take place as indicated. OMe HO + OMe + OH HO + CH; OHDraw the main organic product formed in each of the following reactions: i NaOH (a) (b) O + H₂O OCH 3 OCH 3 + NH3 + CH3CH₂OH OCH3 HCI attach to this assignment.Rank the following carboxylic acids derivatives based on their reactivity towards nucleophiles (1-most reactive - 4- least reactive), and describe the structural features you use to detrmine your ranking.
- (i) (ii) Identify the alpha protons in ethyl acetoacetate (shown below) and draw the structures of the two different enolates which would form under basic conditions. Explain why one enolate is more stable than the other. L ملو Ethyl acetoacetate Draw the structure of the product N formed in the crossed aldol reaction between ketone L and aldehyde M (no mechanism required). H OEt M NO₂ NaOH H₂O/EtOH N C15H14NO4Identify compounds A and B from the following reaction sequence LINH lig MeO 0 (Ozone) MeOH Me₂S Ba) Complete the following reactions and outline the mechanism for the formation of the product b) Predict the products of the following elimination reaction and indicate which is the major product: