If no reaction took place, write “NR”. I know it forms Fe 3+ ions, but what else? Can anyone help? Aim: To identify the presence of phenolic functional group in a given organic compound. It deals with the combustion and esterification of phenol, and the use of iron(III) chloride solution (ferric chloride solution) as a test for phenol. However, the reaction is given differently in different links: $$\ce{3ArOH + FeCl3 → Fe(OAr)3 + 3HCl}$$ source 1, source 2 $$\ce{6 ArOH + FeCl3 -> [Fe(OAr)6]^3- + 3H+ + 3HCl}$$ source C 6 H 5 OH + FeCl 3-----> [Fe(OC 6 H 5) 6] 3-+ 3H + + 3HCl The complex formed is a coordination compound in which iron is hexacovalent. This page gives details of some reactions of phenol not covered elsewhere in this section. Theory: Any of the following test can be carried out to detect the phenolic functional group. I've figured that, that will give me NaCl and Fe(OH)3, but how does the Fe(OH)3 react with phenol? 5. (iii) Phenol gives Liebermann’s nitroso reaction.Phenol in conc. It undergoes substitution reaction easily. Pour the FeCl3 solution into the (KI + H2O) solution and begin timing (t=0 sec. Predict the products in each case (except phenol) where a reaction occurred. (e) explain the acidity of phenol and describe its reactions with bromine and with ethanoyl chloride; (f) recall the colour reaction of some phenols with FeCl3 solution and the use of this test to distinguish phenols from alcohols. Phenol is one of the most versatile and important industrial organic chemicals. Label 4 test tubes and place 2 drops of the liquid to be tested in its own tube. Add 10 drops of the Lucas reagent to each tube and shake the tubes to mix them. (a) 1 equivalent of PBr 3 (b) 1 equivalent of SOCl 2 (c) Dess–Martin periodinane (d) 3 equivalents of acetyl chloride and AlCl 3 as a catalyst (e) Heat and H 2 SO 4 (assume the phenol does not act as a nucleophile in this case). I'm guessing phenol ions, water and Fe 3+ ions are formed, but I'm guessing. Electrophile: is an atom that is attracted to an electron rich centre. They react with each other to produce a violet complex. All chemical test of alcohol and phenols Tests of phenol (i) Aqueous solution of phenol gives a violet colouration with a drop of ferric chloride. Predict the major product if the following reagents/reagents were used. In this part, you will test ethanol, 2-propanol, 2-methyl-2-propanol, and your unknown. Combustion of phenol. Part 4: Lucas Test 6. Questions. Q17.10.1. The reaction is FeCl3 + phenol The sheet I've got says that FeCl3 needs to be neutralised with NaOH before I can react it with phenol. Reaction of Phenol with neutral Ferric Chloride Phenol reacts with neutral ferric chloride to give a violet coloured water soluble complex. No reaction is also a possible answer. (ii) Aqueous solution of phenol gives a white precipitate of 2, 4, 6-tribromophenol with bromine water. Q17.10.2 The chemical reaction between phenol and ferric chloride is a test for the presence of phenol. Phenol burns in a plentiful supply of oxygen to give carbon dioxide and water.
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