Map sapling leaming reacts with phenylmagnesium bromide in ether solution to mak

Question

Map sapling leaming reacts with phenylmagnesium bromide in ether solution to make thanol after acid Grignard reaction? Benzophenone workup. Which of the Select all answers that apply. The glassware was not dried before use The fume hood was too cold. The magnesium ribbon was not wiped clean before use. The magnesium ribbon is insoluble in ether Previous Check Answer ONext 4 Exit Hint Dignard reagents are made by bromoalkanes (alkyl bromides) with magnesium metal in ethoxyethane ether) solvent. They are very powerful bases and nucleophiles. The phenyl carbanion produced by reaction of bromobenzene with magnesium performs a addition to benzophenone, which upon acid workup generates triphenylmethanol. Grignard reactions are exothermic. ynght c 2011 5 Sapling Learning, Inc 103 about us careers partners privacy policy terms of use contact hrin

Explanation / Answer

If the glassware is not dried properly before use, the moisture content present in the glassware reacts with Grignard reagent and turns them into alkenes. Due to this reaction, Grignard reagents lost their nucleophilicity and their effectviness will also decrease.

Thus, the effectiveness of grignard reagent will decrease because of the undried glassware before using them.

Thus, the fist option is correct option.

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