Nitrogen from benzene diazonium chloride

Fluorophenyl Phenyl Tellurium Dichlorideh 7.7 g (52 mmol) of 4-fluoroaniline hydrochloride are diazotized in 25 ml of 15% hydrochloric acid at 0°. A solution of 12.3 g (30 mmol) of diphenyl ditellurium in 250 ml of acetone and 50 ml of acetonitrile is placed in a 1 / flask and the solution is heated to 50°. The iee-cold diazonium salt solution is rapidly added to the vigorously stirred ditellurium solution and then a solution of 10.3 g (60 mmol) of eopper(II) chloride dihydrate in 15 m/ of water is added dropwise over 3 min. When the vigorous evolution of nitrogen has ceased, a large part of the solvent is distilled from the mixture and 150 ml of water together with 100 ml of benzene are added. The stirred mixture is heated under reflux for 20 min, allowed to cool, the benzene layer is separated, dried with anhydrous calcium chloride, and passed through a... 

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