Aim: This was a two trigger off experiment in which the aim of the first part was to compound the Grignard reagent phenylmagnesiumbromide from reacting bromobenzene with magnesium and diethyl ether. The aim of the second part was to synthesise the intoxicant triphenylmethanol using the previously produced phenylmagnesiumbromide by reacting it with benzophenone.
Introduction: This experiment touch two reactions. First the Grignard reagent, phenylmagnesiumbromide, was synthesised from bromobenzene, magnesium and diethyl ether. Once produced, the Grignard reagent was then employ to synthesise triphenylmethanol by reacting it with benzophenone.
Using a Grignard reagent is a utile way of synthesising an alcohol from a ketone. Ketones yield tertiary alcohols so the alcohol produced in this reaction is a tertiary one.
reaction Scheme:
Procedure: The procedure outlined in the chemistry Laboratory Manual
Results:
green goddess of crude product: 0.83g
Yield of gross(a) product: 0.04g
voice yield of pure product: 5%
Melting point of pure product: 164.2°C
Rf value:
Benzophenone: 69%
Crude product: 88%
Pure product: Nothing was seen under the UV light TLC didnt work on it.
Calculations:
spate of empty round-bottom flaskful: 34.
0964g
Mass of round-bottom flask containing crude product: 34.9264g
* Mass of crude product: 0.83g
Mass of weighing paper: 0.4555g
Mass of weighing paper + purified product: 0.4955g
* Yield of purified product: 0.04g
Percentage Yield:
Reaction ratio is 1:1
Limiting reagent: benzophenone
0.00288 moles of benzophenone apply (2.88 mmol/1000)
* Theoretical yield of triphenylmethanol in moles: 0.00288 mol
Yield of purified triphenylmethanol in grams: 0.04g
RMM of triphenylmethanol (C19H16O): 19(12) + 16(1) + 16 = 260g
Moles = mass/RMM
* Yield of triphenylmethanol in moles: 0.04/260 = 0.00015 mol
Percentage yield = actual...If you neediness to get a full essay, order it on our website: Orderessay
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