Draw the structure of Compound A. Explain the reason for using aq. HCI solution

Question

Draw the structure of Compound A. Explain the reason for using aq. HCI solution in the work-up of the above reaction. Include a balanced chemical equation in your answer. Based on your answers to Q2 and Q3, estimate the inter-ring dihedral angle of Compound A. Write down your estimated value and then calculate the dihedral angle of Compound A Comment upon how well your initial estimation of the dihedral angle compares to the calculated value, and compare the calculated value to those obtained for biphenyl, 2-methylbiphenyl, and 2,6-dimethylbiphenyl. What does the calculated inter-ring dihedral angle of Compound A tell you about the relative steric demand of an F-atom compared to a CH3 group in biaryl compounds?

Explanation / Answer

For compound D, the dihedral angle is estimated as 1800(anti) because the two phenyl groups are interlinked nearly by 900 and also the -COOH and -F groups attached to one phenyl group is exactly opposite with other phenyl group. Generally in conformations of this compound is called as anti form.    

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