Draw the chair conformation of the transition state of the given reaction and predict the major diastereoisomer after its aqueous workup. 1. LDA 2. 요 H
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- 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.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.
- Niteshexplain the mechanismIn 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.
- 5NoneI H Ph Br In an E2 elimination reaction, the leaving group and the hydrogen atom must be anti-coplanar for this concerted reaction to occur. ||| Identify which of the following structures has the hydrogen atom and the leaving group aligned anti-coplanar. CH3 Ph Ph H TI F H || OH H Ph H CH3 CH3 Br Ph Br A) I B) II C) III
- Predict the stability from most to least stable and explain why. SN2 Readious (a) Br Draw the transition states when reacted with silver (b) Br Nitrate in ethanol. Br (c) SNI Reactious Br (a) Br (b) Draw the transition states when reacted with Nal in Acetone.based on the structure of compound A and the conditions used, explain in one or two sentences whether the reaction will proceed by an Sn1, Sn2, E1 or E2 pathwaydraw the starting structure that would lead to this major product (and its enantiomer) under these conditions