instant "base-promoted" generation of roper's-type Ru(0) complexes Ru(CO)2(PR3)3 from a simple carbonylchlororuthenium(II) precursor.

An uncommon synergism in the concerted action of OH- and PR3 toward the simple Ru(II) complex Ru(CO)3Cl2(thf) allows a highly efficient reduction of the metal in ethanol or acetonitrile solution at 0 degrees C, with selective production of the corresponding Roper's-type Ru(0) complexes Ru(CO)2(PR3)3 in high yields within 10 min.