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- Base treatment of the following , -unsaturated carbonyl compound yields an anion by removal of H+ from the carbon. Why are hydrogens on the g carbon atom acidic?Electrostatic potential maps of anisole and thioanisole are shown. Which do you think is the stronger acid, p-methoxybenzoic acid or p-(methylthio)benzoic acid? Explain.Why do you suppose ketone halogenations in acidic media are referred to as being acid-catalyzed, whereas halogenations in basic media are base-promoted? In other words, why is a full equivalent of base required for halogenation?
- The carbocation electrophile in a Friede1-Crafts reaction can be generated by an alternate means than reaction of an alkyl chloride with AlCl3. For example, reaction of benzene with 2-methylpropene in the presence of H3PO4 yields tert-butylbenzene. Propose a mechanism for this reaction.3,) you have now eliminated one substitution site and should have two possible sites remaining. Provide a mechanism for the formation of each of the two remaining products. You should include all possible. Resident structures for the cat on intermediates. There should be four resident structures in each mechanism. You do not need to show the mechanism for the formation of the electrify you may assume that only a single iodine will add to the ring. a. b. GOLDEST GAD SE 1029 OH H OH 02AB o 1o1 meiasdoorn woms bevis song of olds pel I+ noboibong tombong 10 to asiqisminoviowTill bris H₂O, EtOH naut nobibba as gada tasest 30 no odt to toubong Input sdr lo notaxillaryn I+ bouborg on to ving di salmsibb or O etshqoqs edt onimaob or atob MM O bax H seu zie.baz anoitecu dale19 H₂O, EtOH lliw gan snated a no quorg lanoituut invellib.noimadue shamore siliqotools al Hoib blaos tad aquosy Insoitonut oor za milline V.mobest ad not sila noistade sitt lenoiraut dues bleno) nobedog ad to goitool…Draw a plausible mechanism for the formation of phenol shown below. Provide explanations for each step in the mechanism. (HINT: The mechanism involves electrocyclic reactions, NOT sigmatropic rearrangements.) HOʻ
- Provide a plausible arrow pushing mechanism for the reaction below. 1 eq. H20 MEOH Но. OMe cat. H-A OHWrite the detailed mechanism for the following reaction. Ph "A hy the E Ph Ph Ph PhAlkyl diazonium salts are unstable even at low temperature. They decompose to form carbocations, which go on to form products of substitution, elimination, and (sometimes) rearrangement. Keeping this in mind, draw a stepwise mechanism that forms all of the following products. NANO2 он + HCI, H2O NH2 он
- 1) For each pair of compounds below, predict the hybridization of the lone pair, and specify the percentage of s and p character. Then rank the compounds in order of decreasing basicity. A :OH A 2) For each compound below, identify the atom most likely to be attacked first by a nucleophile and identify the unoccupied frontier orbital (e.g. p, *, or o*) associated with that atom. B B OEt NH₂ 3) For each compound below, identify the most reactive pair of electrons (either a bond or a lone pair) and specify the corresponding type of frontier orbital (namely n, , or σ). C B N-NH2 4) Draw a plausible arrow-pushing mechanism for each transformation below: THF 25 °C R-N=C: NH₂ D cat. H* OEtAlkyl halides undergo elimination reactions with Brønsted–Lowrybases. The elements of HX are lost and an alkene is formed. Explain this ?What compound is the major product of the reaction sequence shown below? (1) KCN ethanol Он (A) NH2 (B) (2) LIAIH, (xS)/ether (3) dil. H* H;O он NH2 OH (C) (D) Compound C Compound D )Compound A O Compound B