Mg; HCl in THF-d8 (tetrahydrofuran-d8) diluted HCl slowly added to Mg in THF-d8 with stirring; 5 min; filtered;Mg washed with dry THF-d8; dried in vac.; mixed with Ru complex and THF -d8; degassed (freeze-pump-thaw cycles using liq. N2); N2 (1 atm) added;stirred (22°C, 1 d); volatiles removed under vac.; C6D6 added; filtered; detd. by (1)H and (31)P NMR spectra;