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- Furan undergoes electrophilic aromatic substitution more readily than benzene; mild reagents and conditions are sufficient.For example, furan reacts with bromine to give 2-bromofuran.(a) Propose mechanisms for the bromination of furan at the 2-position and at the 3-position. Draw the resonance forms ofeach sigma complex, and compare their stabilities.(b) Explain why furan undergoes bromination (and other electrophilic aromatic substitutions) primarily at the 2-position.O Br O123furan 2-bromofuranWhich of the following statements about substituent effect in electrophilic aromatic substitution reactions (E.A.S.) is false? Electron-withdrawing groups (EWGs) passivates the benzene ring for ortho and para substitution Carbonyl group which are bonded directly to the ring are called electron withdrawing groups (EWGs) In nitration of benzaldehyde, major products are ortho and para-nitro benzaldehyde Regioselectivity in multiple subtitution is determined by the substituent which has a higher activation effect F, Cl, Br, and I are orto-para directing groups, but have passivating effectAlcohols can undergo a lot of different reaction mechanims. If the alcohol group (OH) is attaached to an aromatic core, how will the chemistry change as compared to a typical alkyl alcohol? A) The OH group will become more polarised and more nucleophilic. B) The OH group will become more susceptible to oxidation C) The OH group will become more polarised and therefore basic D) The OH group will become more polarised and therefore acidic.
- In each of the following electrophilic substitution reactions (i) as a first step show the“preactivation” or generation of an electrophilic species; (ii) using arrows provide a mechanisticexplanation of the course of the reaction (show all resonance structures contributing for intermediatearenium ion stabilization); (iii) write all major products of the reaction. Friedel-Crafts acylation of anisole with 2-methylpropanoyl chloride ((CH3)2-CH-COCl) inthe presence of AlCl3 as a catalyst.Styrene (vinylbenzene) undergoes electrophilic aromatic substitution much faster thanbenzene, and the products are found to be primarily ortho- and para-substituted styrenes.Use resonance forms of the intermediates to explain these results.Organic chemists work with tetraphenylporphyrins rather than with porphyrins because tetraphenylporphyrins are much more resistant to air oxidation. Tetraphenylporphyrin can be prepared by the reaction of benzaldehyde with pyrrole. Propose a mechanism for the formation of the ring system shown here:
- In electrophilic aromatic substitution reaction by drawing the structures of the compounds given below Explain which products will be formed as a result of the reaction with the nitronium ion.a)Methoxybenzeneb)Benzoic acidHelp ASAP Illustrate the resonance effect of the methoxy group -OCH3, on the structure of the benzene ring. Do this by writing all the possible resonance forms for methoxybenzene, including the hybrid. Based on your 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.Starting with Benzene (or naphthalene or biphenyl) Show a sequence of 3 electrophilic aromatic substitution reactions. And the intermediates and products Each EAS reaction must introduce a different group on the ring
- A common illicit synthesis of methamphetamine involves an interesting variation of the Birch reduction. A solution of ephedrine in alcohol is added to liquid ammonia, followed by several pieces of lithium metal. The Birch reduction usually reduces the aromatic ring, but in this case it eliminates the hydroxy group of ephedrine to give methamphetamine. Propose a mechanism, similar to that for the Birch reduction, to explain this unusual course of the reaction.Chemistry I want full detailed mechanism for this reaction ( double aromatic nucleophilic substitution reaction between 5,5`,6,6`-tetrahydroxy-3,3,3`,3`-tetramethyl-1,1`-spirobisindane (TTSBI) and tetrafluoroterephthalonitrile (TFTPN)Organotin compounds play a significant role in diverse industrial applications. They have been used as plastic stabilizers and as pesticides or fungicides.One method used to prepare simple tetraalkylstannanes is the controlled direct reaction of liquid tin(IV) chloride with highly reactive trialkylaluminum compounds, such as liquid triethylaluminum (Al(C2H5)3). 3SnCl4 + 4Al(C2H5)3 3Sn(C2H5)4 + 4AlCl3 In one experiment, 0.230 L of SnCl4 (d = 2.226 g/mL) was treated with 0.396 L of triethylaluminum (Al(C2H5)3); d = 0.835 g/mL). If 0.335 L of tetraethylstannane (d = 1.187 g/mL) were actually isolated in this experiment, what was the percent yield?