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The following is an experimental account of the preparation of compound B from Phenylamine.
2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant.
- 1g of phenylamine yielded 1.2g of compound A. Calculate the percentage yield of the reaction.
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- The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Why was it necessary to obtain a constant melting point for B?The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Give the structure of the product formed when an acidified solution of compound A is reacted with (i)Naphthalen-2-ol (2-naphthol) (ii) Sodium cyanideThe following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Question: Answer both (i) and (ii) below (i) Give the structure of the product formed when an acidified solution of compound A is reacted with Naphthalen-2-ol (2-naphthol) and Sodium cyanide separately (ii) 1g of phenylamine yielded 1.2g of compound A. Calculate the percentage yield of the reaction.
- The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Write the equation for the reaction between compound A and phenol Give the name and suggest the colour of the precipitate B. Why is it necessary to recrystallize B several times?The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. (a) What is the general name given to the reaction between phenylamine and sodium nitrite and explain why it's necessary to carry out the reaction at low temperatures. (b) Write the equation for the reaction between compound A and phenolThe following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. What is the general name given to the reaction between phenylamine and sodium nitrite and explain why it's necessary to carry out the reaction at low temperatures? Write the equation for the reaction between compound A and phenol Write the equation for the reaction between phenylamine and sodium nitrite.
- Triphenylmethanol is insoluble in water, but when it is treated with concentrated sulfuric acid, a bright yellow solutionresults. As this yellow solution is diluted with water, its color disappears and a precipitate of triphenylmethanol reappears.Suggest a structure for the bright yellow species, and explain this unusual behavior.1An organic compound (A) was heated with a solution of NaOH. The resulting solution was cooled, acidified with dilute HNO3, and then AgNO3 solution was added. This gave a white precipitate. The compound (A) may be a. benzoic acid b. toluene c. benzyl chloride d. phenyl chlorideGive atleast three characteristics of dichloromethane that make it a good extracting solvent for alkaloid.
- In preparation of p-Nitroaniline, Starting material is 50g of p-nitroacetanilide, 22ml of HCI, 20g of p-nitroaniline. Give % yield of nitro acetanilide.The cyclobutenyl dichloride below reacts with the powerful Lewis acid antimony pentafluoride in liquid SO2 at -75o to give a pale yellow solution that exhibits one singlet at 3.68 ppm in its 1H-NMR spectrum. The species in solution has been deduced to be the salt C8H12X2 where X is an hexahaloantimonate anion. Draw the cation part of the salt C8H12X2what is the chemical form of Lynestrenol and what is the salts of it and what is the specifity of ionisable group and what the group that impact its physicochemical properties ? with illustration