(a) Preparation of dithiocyanatobis(triphenylphosphine) nickel(II), [Ni(NCS)2(PPh3)2] 1.3335 Weigh nickel nitrate Ni(NO3)2.6 H20 (1.2 g) into a 250 mL conical flask. Add 60 mL of n-butanol and heat on a steam bath in the fume hood until the solid dissolves. Weigh out powdered potassium thiocyanate (2.0 g) and add to the hot nickel nitrate solution, while stirring with a glass rod. Continue heating on the steam bath for 20 mins (go on with part (b)). Most of the KNCS should dissolve and white crystals of KNO3 will precipitate. Filter the hot solution using a Buchner funnel. The green fo filtrate is then a butanol solution of nickel thiocyanate. Heat the filtrate on the steam bath. Weigh triphenylphosphine (2.1 g) into a 100 mL conical flask. Add 20 mL n-butanol and heat on a steam bath until the solid dissolves. Add the hot triphenylphosphine solution to the hot nickel thiocyanate solution, and briefly swirl the contents of the flask. Allow to stand undisturbed in the fume hood while the flask cools and the product crystallises. Filter the product using a Buchner funnel, wash with a small portion of n-butanol and dry by sucking air through the sample. Record the yield. Prod. wh P

(a) Preparation of dithiocyanatobis(triphenylphosphine) nickel(II), [Ni(NCS)2(PPh3)2] 1.3335 Weigh nickel nitrate Ni(NO3)2.6 H20 (1.2 g) into a 250 mL conical flask. Add 60 mL of n-butanol and heat on a steam bath in the fume hood until the solid dissolves. Weigh out powdered potassium thiocyanate (2.0 g) and add to the hot nickel nitrate solution, while stirring with a glass rod. Continue heating on the steam bath for 20 mins (go on with part (b)). Most of the KNCS should dissolve and white crystals of KNO3 will precipitate. Filter the hot solution using a Buchner funnel. The green fo filtrate is then a butanol solution of nickel thiocyanate. Heat the filtrate on the steam bath. Weigh triphenylphosphine (2.1 g) into a 100 mL conical flask. Add 20 mL n-butanol and heat on a steam bath until the solid dissolves. Add the hot triphenylphosphine solution to the hot nickel thiocyanate solution, and briefly swirl the contents of the flask. Allow to stand undisturbed in the fume hood while the flask cools and the product crystallises. Filter the product using a Buchner funnel, wash with a small portion of n-butanol and dry by sucking air through the sample. Record the yield. Prod. wh P

Understanding Business

12th Edition

ISBN:9781259929434

Author:William Nickels

Publisher:William Nickels

Chapter1: Taking Risks And Making Profits Within The Dynamic Business Environment

Section: Chapter Questions

Problem 1CE

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