If the benzaldehyde (in step 1) was para-nitro substituted, the effect on the reaction rate would be:
Question 4 options:
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slower because the nitro group destabilizes the negatively charged intermediate; |
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faster since the nitro group stabilizes the negatively charged intermediate; |
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slower because the nitro group is deactivating in electrophilic aromatic substitution. |
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unchanged; |

If the benzaldehyde (in step 1) was para-nitro substituted, the effect on the reaction rate would...
1) Which of the following is an intermediate in the bromination of toluene? p) Ha BrH 2 2) Under what reaction conditions would the electrophilic chlorination of aromatic compounds usually occur? A) Cl2, AlCl3 B) C12, CCl4 C) Cl2, H20 D) NaCl, H20 E) NaCI, CH3OH 3) 3) Which of the following is the strongest activating group in electrophilic aromatic substitution reactions? A) -CO2CH3 B)-NO2 C) -OCH3 D) -CH2CH3 E) -N(CH3)2 4) _ 4) In electrophilic aromatic substitution reactions the...
3. (10 points) Let us take a closer look at the electrophilic aromatic substitution step. 1) Draw the mechanism of the electrophilic aromatic substitution step. HO. electrophilic Hor o so substitution но сня CH3 2) What is the role of the second hydroxyl group on benzene? 3) If 1,3,5-trihydroxybenzene is the starting material, will the reaction be faster or slower? Why?
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Conceptual Checkpoint 18.32 The presence of additional nitro groups can have an impact on the temperature at which a nucleophilic aromatic substitution will readily occur. Consider the following example Cl он 1) NaOH 2) Hyo NO2 NO2 When both R groups are hydrogen atoms, the reaction readily occurs at 130°C. When one of the R groups is a nitro group, the reaction readily occurs at 100°C. When both R groups are nitro groups, the reaction...
1.The best way to describe the "arrow" showing the mechanism of EAS is: A.it goes from the attacking atom (electrophile) to the carbon being attacked. B.it goes from the attacking atom to the new bond being formed. C.it goes from the electron pair in the pi-bond on the ring to the new sigma bond being formed. D.it involves a half-head arrow from the attacking species and a half-head arrow from the pibond to the new sigma bond to be formed....
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Determine the product formed when each compound is treated with Br2 and FeBr3. Drag the atom labels to their appropriate positions. CN Atom labels H H Br Br2 A. FeBr Br H OH OH Br Br. Br2 FeBr3 H H Br Br H Br2 FeBr H1 H Reset T Rank the compounds in each group in order of decreasing reactivity in electrophilic aromatic substitution. CI Decreasing reactivity Rank the compounds in each...
4. An energy diagram for electrophilic aromatic substitution of benzene with Br2 with FeBr3 as catalyst below. The rate-limiting step is formation of the sigma complex (Step 1). Generally, any factor that stabilizes the sigma complex also stabilizes the transition-state leading to that complex. This effect leads to a lower transition-state energy and a faster reaction. rate-limiting transition state reactants + Br + FeBrz Η Br FeBr + O energy intermediate products Br + HBr + FeBr 3 -45 kJ/mol...
1.Friedel-Crafts acylation of ortho-nitrotoluene with acetyl chloride and aluminum trichloride gives: A.a mixture of acetophenones with the nitro group always ortho or para to the carbonyl. B.almost exclusively a single product, 3-nitro-4-methyl-acetophenone. C.2-methyl-acetophenone by nitro group displacement. D.no reaction since the nitro group is so deactivating. 2.You decide to make meta-nitrophenol by doing which of the following steps? A.Reacting phenol with fuming nitric acid in an ice bath. B.Reacting benzene with fuming nitric acid, then reacting the product with chlorine/iron,...
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The second step of the synthesis transformation of the chlorosulfonyl functional group into a sulfonamide) is an example of a a. Nucleophilic displacement (substitution) b Elimination C. Electrophilic aromatic substitution d. Acid hydrolysis Esterification e. THE SULFONIC ACID GROUP AND ITS DERIVATIVES Sulfonic acids are organic analogs of sulfuric acid, a very strong acid. They are highly corrosive, react vigorously with water, and can cause skin bums....
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1) A substitution reaction is: [2] a) A reaction during which an OH group of a molecule is replaced by a halogen. b) A reaction during which water is the leaving group. c) A reaction during which a functional group of a molecule is replaced by an electrophile. d) A reaction during which a functional group of a molecule is replaced by another functional group. V 12 2) Substitution reactions are classified either as electrophilic or nucleophilic...
250 ChemActivity 29 Electrophilic Aromatic Substitution no ChemActivity 29 Part A: Electrophilic Aromatic Substitution (What products are formed when a strong electrophile is added to benzene?) Model 1: (review) Electrophilic Addition of HCI Rani o g cyclohexene carbocation intermediate Run 2 U X benzene This product carbocation intermediate DOES NOT Critical Thinking Questions 1 For Rxn I (above) draw curved arrows showing the mechanism of electrophilic addition of HCl. Include an appropriate carbocation intermediate in the box above. Figure 1:...