Dibromobis dimethylsulfide palladium II

The red-orange solid may be stored at ambient temperature and is soluble in a range of organic solvents. 

Methyllithium (0.4% LiCl 3.33 mL, 3.50 mmol) is added to a cooled ( — 78°C) and stirred suspension of trans-[PdCl2(SMe2)2] (0.50 g, 1.67 mmol) in anhydrous diethyl ether (100 mL) under a nitrogen atmosphere in a threenecked, 250-mL, round-bottomed flask fitted with a nitrogen inlet, pressureequalizing dropping funnel, and a septum. The suspension is stirred for 1 h at 

The yellow solid may be stored at — 20°C it slowly darkens over a period of weeks but is still useful in syntheses. The complex is soluble in a range of organic solvents and pyridazine/ligand exchange reactions have been satisfactorily accomplished in acetone, benzene, dichloromethane, and chloroform, but solutions of the complex are unstable in the absence of added ligand. 

The procedure outlined above is followed, using trans-[PdBr2(SMe2)2] (0.50g, 1.28 mmol) and LiMe (1.22 mL, 1.28 mmol). The yield of the orange-tan product is 0.23 g (68%). H NMR in CDC13 5 2.43 (SMe2), 0.87 (PdMe). 

The complexes may be stored at — 20°C for many weeks without any visible sign of decomposition or deterioration of synthetic utility. They are soluble in dichloromethane and chloroform, and partially soluble in acetone. Exchange 

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