Why is a methoxy group more activating than a methyl group?OIt creates a fourth resonance structurein the sigma complexO It directs to the ortho-meto configurationsO Its steric interaction enhances the regioselectivity towards lower energy configurationsO Its induction effects amplify the activation Identify the type of reaction shown below.HO.conc. H,SO,HeatO E1O SN2O SN1O E2

OMe Has +M effect and CH3 has +I effect E1 mechanism Crbocation intermediate formed in First step…

Why is a methoxy group more activating than a methyl group? O It creates a fourth resonance structure in the sigma complex O It directs to the ortho-meto configurations O Its stericinteraction enhances the regloselectivity towards lower energy configurations O Its induction effects amplify the activation

Why is a methoxy group more activating than a methyl group? O It creates a fourth resonance structure in the sigma complex O It directs to the ortho-meto configurations O Its stericinteraction enhances the regloselectivity towards lower energy configurations O Its induction effects amplify the activation

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter19: Aldehydes And Ketones: Nucleophilic Addition Reactions

Section19.SE: Something Extra

Problem 82AP

See similar textbooks

Similar questions

Draw resonance forms for the sigma complexes resulting from electrophilic attackon substituted aromatic rings. Explain which substituents are activating and whichare deactivating, and show why they are ortho,para-directing, or meta-directing.
In the Directive Effects in the Bromination of Vanillin, the following reaction was performed: CHO сно Br2 CH,CH,CO,H Br OMe OMe OH OH vanillin 5-bromovanillin Which of the following are correct resonance structures of the intermediate cation in this reaction? Mark all that are correct. CHO CHO CHO H. H. H. Br OMe Br OMe Br OMe OH OH A B CHO CHO Br H- CHO H. Br OMe Br OMe OMe OH OH OH F
owing reactions proceeds via an SN1 or SN2 of the reaction: (b) S2 pro85 39 Br tort atubong auonsV HMPAnoitutitadua
In the Directive Effects in the Bromination of Vanillin, the following reaction was performed: сно сно Br2 CH,CH,CO,H Br OMe OMe OH OH vanillin 5-bromovanillin Which of the following are correct resonance structures of the intermediate cation in this reaction? Mark all that are correct. CHO сно CHO H. H. Н. Br OMe Br OMe Br OMe ÖH OH OH B CHO CHO Br H- CHO H. Br OMe Br OMe OMe OH OH OH D E
One of the side product of the synthesis of 2,4- DHPM is 1,4-DHP via the Hantzsch mechanism. Which of the following method best differentiate the main product and the side product? O R O EtO OEt EtO NH H3C° Me `Me N' H N. 2,4 DHPM 1,4 DHP The side product will have one IR shift at around 3200-3400 while the main product will have two. The side product will have one IR shift at around 1715 while the main product will have two. The side product will have two IR shift at around 1715 while the main product will have one. The side product will have two IR shift at around 3200-3400 while the main product will have one.
Choose the correct set of resonance structure for the sigma complex formed in the nitration of benzene. O₂N H O₂N H H • [* - & - *] A H B с O₂N H H O₂N H H O₂N H O₂N H H H ₂N H O₂N H H H H H • [& − & − &] D H H O₂N H
Suggest a plausible mechanism for the following transformation : H (i) H5C6 (ii) H&C H 1) LDA/ 2) Mel/-78 °C 1) LDA/ 2) Mel/-78 °C →?
In the mechanism for the nitration of benzene, what step follows the formation of the nitronium ion (NO2*)? benzene attacks the nitronium ion to give a sigma complex O benzene is protonated by nitric acid to give a sigma complex the sigma complex is deprotonated, thereby restoring aromaticity a leaving group is ejected, thereby restoring aromaticity
What is the confirmatory reagent of AsO2 −3AsO2 −3?
The synthesis of an azo dye is shown below. Please answer the following questions. NH2 *N2 1) Na2CO3 2) NANO2, HCI B N-N A Š3H Step 1 Step 2 2 4. How many different carbon signals do you expect from the NMR of compound 3? oa)10 ob)16 oc)15 od)14 oe)11 of)12 og)13
d) Suggest a plausible mechanism for the following reaction : Ph3P Ph3P Pt Ph PPh3 PPh3 Pt Ph
A compound (C3H,NO) gives the following NMR data. In the box below please draw the structure of the compound. 'H-NMR: 2.06 ppm, s(3H); 7.01 ppm, t(1H); 7.30 ppm, m(2H); 7.59 ppm, d(2H); 9.90 ppm, s(1H) 13C-NMR: 168.14; 139.24; 128.511; 122.834; 118.90; 23.93 • You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. Do not include lone pairs in your answer. They will not be considered in the grading.