2.2 Draw all the important resonance contributors for the arenium ions formed from each of these molecules when reacted with Br2 and FeBr3 and use this information to decide whether the substituent is ortho/para or meta directing. OH b) N(CH3)2 Ô NH CH3
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- In some nucleophilic substitutions under SN1 conditions, complete racemization does not occur and a small excess of one enantiomer is present. For example, treatment of optically pure 1-bromo-1-phenylpropane with water forms 1- phenylpropan-1-ol. (a) Calculate how much of each enantiomer is present using the given optical rotation data. (b) Whichproduct predominates—the product of inversion or the product of retention of conguration? (c) Suggest an explanation for this phenomenon.In some nucleophilic substitutions under SN1 conditions, complete racemization does not occur and a small excess of one enantiomer ispresent. For example, treatment of optically pure 1-bromo-1phenylpropane with water forms 1-phenylpropan-1-ol. (a) Calculate how much of each enantiomer is present using the given optical rotation data. (b) Which product predominates—the product of inversion or the product of retention of configuration? (c) Suggest an explanation for this phenomenon.Explain why the pKa of compound A is lower than the pKa's of bothcompounds B and C.
- In some nucleophilic substitutions under SN1 conditions, completeracemization does not occur and a small excess of one enantiomer ispresent. For example, treatment of optically pure 1-bromo-1-phenylpropane with water forms 1-phenylpropan-1-ol. (a) Calculate how much of each enantiomer is present using the given optical rotation data.(b) Which product predominates—the product of inversion or the product of retention of configuration? (c) Suggest an explanation for this phenomenon.In some nucleophilic substitutions under SN1 conditions, complete racemization does not occur and a small excess of one enantiomer is present. For example, treatment of optically pure 1-bromo-1-phenylpropane with water forms 1-phenylpropan-1-ol. (a) Calculate how much of each enantiomer is present using the given optical rotation data. (b) Which product predominates—the product of inversion or the product of retention of configuration? (c) Suggest an explanation for this phenomenon.a. Draw the two chair forms for compound A, being careful to show the stereoisomergiven above. You may use shorthand R in your drawings. Indicate the MAJOR and MINORconformations b. Using curved-arrow convention and the correct chair form of Compound A, show themechanism for the formation of alkene C from Compound A. You may use B: to indicatethe base.
- Determine whether the following molecules are aromatic (A), non-aromatic (NA), or anti-aromatic (AA), and show the use of a Frost circle in determing aromaticity. You may assume planarity.Identify each one Which one is aromatic antiacromatic or nonaromatic ( need explaination)2. Classify each of the following as either aromatic (A) or nonaromatic (NA)
- Predict whether the cyclic system is aromatic , anti-aromatic, or non-aromatic by counting electrons and explain why ? Also circle all the basic nitrogen’s wherever possible . Show all lone pairs which are involved in cyclic delocalization?What is the degree of unsaturation for each compound? Show calculation for d) and e)In RPLC, Compound A is more polar than compound B. In which column will compound A be more retained than compound B? A. C18 B. C8 C. Phenyl bounded column D. All of the above E. None of the above