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The reaction in acetonitrile between PdCl2 and the carbonyl-stabilized ylide Ph3P=CHCO2Me. Synthesis of (CO2Me)>(μ-Cl)>2 and some of its derivatives and of 2>
Vicente, Jose,Chicote, Maria T.,Fernandez-Baeza, Juan
, p. 407 - 414 (1989)
Upon reaction of PdCl2 with the ylide Ph3P=CHCO2Me in acetonitrile (1/2) at room temperature the complex 2> (1) separates.The same reaction at the reflux temperature gives the dinuclear complex (CO2Me)>(μ-Cl)>2 (2) along with the phosphonium salt Cl.Complex 1 is better obtained by reaction (1/2) of with the ylide at room temperature.Complex 2 reacts with PPh3 (1/2) or pyridine (py) (excess) to give the products of bridge-splitting (CO2Me)>Cl(L)> (L = PPh3 (3), L = py (4)).Complex 3 is also obtained when a 1/4 molar ratio of the reactants is used but, in the presence of NaClO4 the complex (CO2Me)>(PPh3)2>ClO4 (5) is obtained; complex 2 reacts with bidentate ligands LL in the presence of NaClO4 (1/2/3) to give (CO2Me)>(LL)>ClO4 (CO2Me)>(acac)> (8).
