Practical C - Melinda Salomon 27 June 2007 Practical...

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Melinda Salomon 27 June 2007 Practical – Diazonium Coupling Reaction: Methyl Orange The purpose of this experiment is to generate a diazonium salt which is then used in a diazo coupling reaction to yield methyl orange. Mechanism - MW Amount mmol bp (C) mp (C) d Anhydrous NaHCO3 84.01 60mg .999 264 35-37 Sulfanilic acid 173.19 200mg 1.25 202 19-20 1.485 NaNO2 69 80mg 1.16 78.5 281 2.17 Concentrated HCl 0.25mL N,N-dimethylaniline 121.18 0.14mL .001 194 1.5-2.5 0.956 Glacial acetic acid 50.05 0.10mL .002 118 16.7 10% aqueous NaOH 1.5mL NaCl 58.44 500mg 8.56 1413 804 2.16 H2O 18.02 5mL .277 100 0 Methyl orange (product) 327.34 315 1.0 *Above table information was found via search on www.wikipedia.com and physchem.ox.ac.uk/MSDS The procedure for this experiment can be found in the Organic Chemistry Laboratory, Practical Examination, General Guidelines handout – Practical C.
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Procedure - 1. Dissolve 60mg anhydrous NaHO3 in 5mL water in a 25mL Erlenmeyer flask. 2.
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This note was uploaded on 05/29/2008 for the course CHEMISTRY 123 taught by Professor Cannon during the Summer '07 term at Temple.

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Practical C - Melinda Salomon 27 June 2007 Practical...

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