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- Please show reaction mechanisms with curly arrows for both ozonolysis reactionFluoride ion is usually a poor leaving group because it is not very polarizable. Fluorideserves as the leaving group in the Sanger reagent (2,4-dinitrofluorobenzene), used inthe determination of peptide structures (Chapter 24). Explain why fluoride works as aleaving group in this nucleophilic aromatic substitution, even though it is a poor leavinggroup in the SN1 and SN2 mechanisms.On a large scale (such as a chemical plant) is it better for the Grignard reagent to attack a hindered carbon or an unhindered carbon? And why?