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Organic and natural II Lab
Wed. 11-1: 50
Name: Grignard Response with a Ketone: Triphenylmethanol Portion 1
The purpose of this experiment is to learn how to make Grignard reagents. The reactions of the Grignard reagents with ketones form tertiary alcohols. These kinds of reagents are highly air- and moisture-sensitive supplies. We is going to observe the creation of the Grignard reagents, which will magnesium metal is become organometallic salts.
The experiment was as adopted as in the text " Microscale Organic and natural LaboratoryвЂќ by Mayo from pages 275-283. The following changes were made: We all performed the experiment through and including Isolation of Product. All of us followed the normal phenylmagnesium bromide preparation treatment, not the alternate treatment. In the solitude of product part, we did not copy the dried out ether answer to a Craig tube and instead transferred the dried ether solution to a tared, screw-cap test conduit. The elementary product was left to be dried for the next week.
Data and Results:
Data and Results Table:
1 . 3mL
Molar mass (g/mol)
seventy four. 12
1 ) 495
1 ) 738
1 . 11
thirty four. 6
184. a few
Iodine was a brown/red color
Following adding the bromobenzene-ether remedy, it little by little turned into a gray color than a crystal clear color. Yet since I added an excessive amount of iodine, my solution actually turned back in a brown color. When adding the benzophenone, it absolutely was pink for the second, then turned cloudy/brownish color. The perfect solution is then began to turn uptempo after adding the benzophenone When removing the azure solution, the colour was yellow on top, the...
Cited: 1 . Mayo, G. W.; Pike, R. M.; Forbes, Deb. C. Microscale Organic Lab with Multistep and Multiscale Syntheses, 5th ed.; David Wiley & Sons, Incorporation., 2011; pp 368-373.
2 . Modifications for Girgnard Reaction with a Ketone: Triphenylmethanol Portion 1, Blackboard document.
a few. http://www.chemicalbook.com