Q15. Draw all the resonance forms of the cationic intermediate formed by the reaction of phenol (1) and the pitropium ion (2). Draw resonance forms for both para and meta attack? According to the stability of the resonance forms you drew, which attack is favoured? он NO2 2

What is the product of the following transformation? 1. HgSO4, H2SO4, H2O 2. НО OH Eto 3. LIAIH4 4. Нао HO ОН H HO HO

There are three beta hydrogens. What are the three beta hydrogens?

Draw the most stable resonance form for the intermediate in the following electrophilic substitution reaction. CH3 CH3 H3PO4 HO, + H3C CH3 HO HO First stage in synthesis of the epoxy and polycarbonate ingredient bisphenol-A You do not have to consider stereochemistry. Include all valence lone pairs in your answer. In cases where there is more than one answer, just draw one.

Why is a strong acid (like HCI) used in a Grignard reaction? O 1) A strong acid is used in the Grignar reaction in order to protonate the carbonyl in order to make a better leaving group, OH. Once teh OH leaves, the alcohol group is reformed due to water. A stable tetrahedral intermediate with a negatively charged oxygen forms O 2) that does not possess a leaving group. This intermediate will exist until a proton source from the strong acid protonates the negatively charged oxygen, affording the neutral alcohol product. 3) The use of a strong acid is not necessary. It is simply recommended as it increases the yield produced in the reaction. 4) The use of a strong acid is necessary for the formation of a Grignard reagent. Without a strong acid, the organomagnesium compound cannot be formed.

why isntt the product e2 since we have strong nucleophil and polar protiction solvent Br 10. Θ Θ Na HOCH 3 N3 ง SN2 NaBr

17.  Step 1. Draw the first step of this reaction, starting with the alcohol and SOCl2 Step 2: Draw the second step of this reaction, starting with pyridine and the cation generated in the first step. Step 3: Draw the third step of this reaction, starting with the alkyl chlorosulfite and Cl− .

Draw the alkyl bromide for reaction 3. Select Draw Rings More Erase H Br Reagents Carboxylic Acid Product 1. Diethyl malonate, NaOC2H5, C2H5OH 2. NaOH, H2O 3. H3O*, heat HO.

Draw the main organic products of the reaction. Indicate the stereochemistry, including all hydrogen atoms, at each stereocenter. Omit byproducts such as salts or methanol. 4 וון. Br CH3ONa CH3OH Incorrect Н 0 H

Fill in the boxes with reagents or products and show the mechanism.