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- 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?Draw the mechanism ffrom benzaldehyde to this using: i)NaBH4 ii)TsCl, py iii)NaCN iiii)H+, H2OPlease help with the following ochem mechanisms.... 1. Provide the stepwise mechanisms for the following reactions (see attached picture)
- give clear handwritten answer please-Given tautomerization mechanism thatcontains multiple errors. Selectany errors that occur in step 1 ofthe mechanism-1.Draw the product, please shows step by step in details 2.Explain if (CH3)2CH in this reaction can attach in ortho positon in Friedel Craft Alkylation?? why or why not???The (+) - aureol is a natural product that has shown selective activity against certain colon and lung cancer cell lines. It is postulated that a key step in the biosynthesis of this substance is the conversion of carbocation A into B. Propose a possible mechanism for this transformation (MUST show the corresponding arrows).
- Please fill out for each reaction i.Fill in the missing starting materials, products, or reagents as necessary.If no reaction occurs, write "N.R." and explain why this is the case. ii. Label each transformation as SN1, SN2, or acid/base. iii. Indicate if the product is racemic or a single enantiomer.This is Wittig Rxn: Whatever mechanism you choose to draw is fine since you can leave the base as B: Draw the arrow pushing mechanism using the compounds below – Constant: 4-nitrobenzyl benzaldehydebase 1: triethylaminebase 2: NaOHbase 3: K2CO3ylide: Acetonyltriphenylphosphonium chloride1. what is the Nature of the leaving group (LG)? 2. what is the relative size of activation energy (Ea) for each reaction? 3. what is the Hammond's postulate? 4. what are the Relative thermodynamic stability of the reactive intermediates? 5. what is Influence of the solvent (if given) on the reactions and intermediates?