The grignard synthesis of triphenylmethanol

Author(s): TangjieZhang

The goal of this experiment is to synthesize a Grignard reagent phenyl magnesiumbromide, and use it to synthesize the alcohol triphenylmethanol via Grignard reaction.This Grignard reaction was performed through the reaction between phenylmagnesiumbromide and benzophenone, followed by an acid work-up.Laboratory techniques such as: reflux, vacuum filtration, decantation were involved in this experiment.The product triphenylmethanol will then be purified by recrystallization, and percentage yield is used to measure the success of reaction, in which a 29.08% yield was obtained.The melting point of triphenylmethanol was measured to be128-130 °C, comparing to the literature value of 162 °C, indicating a substantial amount of impurity.Its IR, 1H NMR and 13C NMR spectra will also be obtained and compared to the standard, in order to further confirm its identity.Since the experimental results were generally similar to literature values, this experiment was considered successful.

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