(Ru)2(DMBA)4((BF)4)2 and (Ru)2(DMBA)4(N(O)3)2: the first examples of diruthenium compounds containing B(F)4- and N(O)3- as ligands

Triphenylphosphinecyanoborane (1), diphenyl(2-methoxyphenyl)phosphinecyanoborane (2), diphenyl(p-tolyl) phosphinecyanoborane (3), methyldiphenylphosphinecyanoborane (4) were synthesized either by Lewis-base exchange reaction or by the reaction of the sodium cyanoborohydride with the corresponding phosphine hydrochloride in 54–88% yields. All the products were characterized by spectroscopic techniques and elemental analyses. These compounds were evaluated for their antitumor activity.