The Synthesis of Triphenylmethanol from Benzophenone Via a Grignard Reaction Cydni Scott Lab Partner: Andrew Davis TA: Raymond Seibel Tuesday at 8:30AM PSE 307 Abstract The purpose of this experiment was to observe the mechanisms of a Grignard reaction by performing a synthesis of triphenylmethanol from benzophenone. To react the Grignard reagent with a ketone and an ester. To perform a cost-analysis of the two reactions. Tare the capped dry 3 ml conical vial … Synthesis of Triphenylmethanol Objectives To use the Grignard reagent in a water free environment. Part I: Preparation of the Grignard Reagent, Phenylmagnesium Bromide Part II: Synthesis of Triphenylmethanol Gently swirled vial to bromobenzene Added 1.5mL of bromobenzene into a pre-weighed 10mL conical vial with 5mL of anh. The Grignard reagent attacks the electrophilic carbonyl carbon of the benzophenone and pushes electrons up to the oxygen. In 1912, Victor Grignard received the Nobel prize in chemistry for his discovery of a new series of reactions that … Lab #5: Grignard Reaction – Synthesis of Triphenylmethanol John Kang Chem 152L Performed: 7/20/04 Date submitted: _____ Lab Partners: Sang Lee, Vicky Lai TA: John Stanko Abstract: This experiment explored the synthesis of triphenylmethanol through the use of Grignard reagents. Triphenylmethanol is a white crystalline aromatic compound, which produces an intensely yellow color in a strong acidic solution due to formation of carbocation. B. Triphenylmethanol Synthesis: While the Grignard reagent is being prepared, make the benzophenone solution. CHEM 236 Grignard Reaction Lab Report Experiment # 9. diethyl ether Added 0.5g of magnesium metal turnings and crushed with glass rod until a cloudy brown-gray appearance Experiment 12: Grignard Synthesis of Triphenylmethanol Reactions that form carbon-carbon bonds are among the most useful to the synthetic organic chemist. Grignard Reaction: Synthesis of Triphenylmethanol Pre-Lab: In the “equations” section, besides the main equations, also: 1) draw the equation for the production of the byproduct, Biphenyl. The percent yield of the product was 10% on a relatively humid day. To synthesis triphenylmethanol from Grignard reaction . 1. Calculate the mass of 1.5 mmoles of benzophenone (MW = 182.220 mg/mmole) to the nearest mg. Record the calculation. In the Lab The purpose of this experiment was to synthesize triphenylmethanol. 2. Objective: 1. Background In 1912 Victor Grignard received the Nobel prize in chemistry for his work on the reaction that bears his name, a carbon-carbon bond-forming reaction by which almost any alcohol may be formed from appropriate alkyl halides and carbonyl compounds. Use as reference also experiment #35/35A (triphenylmethanol) in your lab book to answer question 8. 2) what other byproduct might occur in the reaction? Grignard reaction technique was used in this synthesis… In the second step, acid is added to give the alcohol. Name: Refer to the videos posted for experiment 9 on ecampus (for the lab demonstration and Rotary evaporation and Crystallization techniques) to answer the questions below. 4 Anna Shahrour Synthesis of triphenylmethanol from phenyl magnesium bromide. Introduction: Grignard reagents are organomagnesium halides (RMgX), and are one of the most synthetically useful and versatile classes of … The Grignard Synthesis of Triphenylmethanol Organic Chemistry Lab II March 19, 2012 Abstract The purpose of this experiment was to synthesize the Grignard reagent, phenyl magnesium bromide, and then use the manufactured Grignard reagent to synthesize the alcohol, triphenylmethanol, by reacting with benzophenone and protonation by H3O+. Why? The Grignard Synthesis of Triphenylmethanol Organic Chemistry Lab II March 19, 2012 Abstract The purpose of this experiment was to synthesize the Grignard reagent, phenyl magnesium bromide, and then use the manufactured Grignard reagent to synthesize the alcohol, triphenylmethanol, by reacting with benzophenone and protonation by H3O+. To assess the purity of the product by determining its melting point. To purify the product via recrystallization. To study the method to produce Grignard reagent . In the “observation” section, draw data tables in the corresponding places, each with 2 After the reaction was completed, the product, triphenylmethanol… Grignard Reaction 11 Chem 355 Jasperse Grignard Synthesis of Triphenylmethanol I.
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