Diphenylphosphino benzenamine

Submitted by MERVYN K. COOPER, J. MICHAEL DOWNES, and PAUL A. DUCKWORTHt Checked by MICHAEL C. KERRY,1 RONALD J. POWELL, and MARK D. SOUCEK1  

The title ligand, H2L, forms complexes with the later transition metals, which can be deprotonated to produce compounds containing the little studied phenylamido donor group. Its complexes with platinum and rhodium have been shown to be of mechanistic significance.  

A round-bottomed, 500-mL flask equipped with a Teflon-coated magnetic stirring bar, still-head and condenser is charged with 2-chlorobenzenamine, 128 g (1.00 mol), and triphenylphosphine, 262 g (1.00 mol). Next, 6S g (0.50 mol) of powdered, anhydrous nickel chloride (dried by heating the hexahydrate at 130° for at least 48 hr) is added and the mixture is heated to 200° with stirring. A small amount of residual water distills over. The temperature is maintained at 200-220° for 4 hr. The resulting dark blue melt is cooled to 180-160° then poured (CARE ) into 600 mL of hot (60°) water previously acidified with a few drops of concentrated HCl. BoUing acidified water (400 mL) is added to the reaction vessel to extract any 

McAuliffe and W. Levason, Studies in Inorganic Chemistry 1 Phosphine, Arsine and Stibine Complexes of the Transition Elements, Elsevier, Amsterdam, 1979. 

Cooper, J. M. Downes, and P.A. Duckworth, Aust. J. Chem., submitted for publication. 

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