sodium naphthalenide in tetrahydrofuran byproducts: NaCl; (Ar, Schlenk) a soln. of sodium naphthalenide in THF was added dropwise to the suspn. of Pt-complex and phosphine in THF, stirred for 2 h; the solvent was removed under vac., an excess of naphthalene was sublimed, the residue was extd. with hexane, filtered;

K#Hg in tetrahydrofuran stirring overnight under N2; the soln. siphoned off, the solvent removed in vac., the residue extd. with pentane, cooling to -80°C, the solvent siphoned off, the crystals washed with pentane, recrystn. from pentane and drying in vac.; elem. anal.;