DIAzoNIUIM SALT DIAZONUIM SALTCHEMISTRr the organic chemistry text 19.16 and 19.
ID: 506626 • Letter: D
Question
DIAzoNIUIM SALT DIAZONUIM SALTCHEMISTRr the organic chemistry text 19.16 and 19.17 From previous lab procedures: chromarography. Iese of drying piazonium salts are widely used both as reagents in organic syn amines, identification of of marijuana. Cannabis sativa L., and the s and as color test reagents in the of the analysis of its three The fragmented marijuana plant material reacts with p iazonium chloride to give a red- presumably due to dyes formed via coupling reactions. This is useful forensic test as tobacco not give a color reaction with this reagert. p- can be used to locate the colorl THC, CBN, and CBD spots when extract of marijuana is analyzed by paper hromatography. THc gives red violet, CBN gives brown-violet. chromatogram is sprayed with the diazonium salt solution and then and CBD gives brown spots when the types of applications of salts will be examined with base. exercise the two aforementioned a synthesis to obtain an iodobenzene derivative. In In this lab through a simple paper the above three components of a drug, diazonium salts undergo addition to coupling with phenols, such as aromatic amines and substitution reactions. Particularly other important types of reactions: coupling with with reactions are the ones that replace the N2 group Paper phenols listed below will be chromatographed in order to determine their R. this experiment each of the three of these phenols below will be separated values. Also, components of an unknown mixture of two or Common Name systematic Name 3-dihydroxybenzene resorcinol 2 1, 3, 5-trihydroxybenzene phloroglucinol 1,4-dihydroxybenzene hydroquinone 2-naphthol 2-hydroxynaphthalene catechol 1,2-dihydroxybenzene pyrogallol 1,2,3 trihydroxybenzene cheomanopaphy has are all colorless, a way must be found to locate each phenol the paper when the been salts to produce azo dyes, since couple with "visualization reagent. azonium hydrogen sulfate and use it as a Copyright 2015Explanation / Answer
In the section synthesis via diazonium salt, following steps were taken:
During this process, KI reacts with p-nitrobenzene diazonium hydrogen sulphate to form corresponding Iodobenzene.
NO2.C6H4-N=N+ HSO4- + KI = NO2.C6H4.I + N2 + KHSO4
Calculation of Theoritical Yield :
1 mole of KI reacts with 1 mole of diazo salt and produces 1 mole of iodobenzene.
Molar mass of KI = 166 gm/mol
Molar mass of NO2.C6H4-N=N+ HSO4- = 247.18 gm/mol
Molar Mass of NO2.C6H4.I = 249.01 gm/mol
gm of KI in 0.03 mole = 166 x 0.03 = 4.98 gm
4.98 gm of KI will react with (247.18/166) x 4.98 = 7.42 gm of NO2.C6H4-N=N+ HSO4-
7.42 gm of NO2.C6H4-N=N+ HSO4-will produce (249.01/247.18) x 7.42 = 7.48 gm of NO2.C6H4.I
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