The title clusters [（PPh3）（p-BrC6H4CO2）2RuB10H8] （1） and [（PPh3）2Ru（PPh3）（p-BrC6H4CO2）RuB10H9] （2） have been prepared and characterized by elemental analysis, FT-IR, ^1H, ^13C NMR spectra and single-crystal X-ray diffraction analysis. The clusters crystallize in monoclinic system, space group C2/c, with a =2.569（4） nm, b= 1.546（2） nm, c= 1.927（3） nm ,8=95.11（2）°, Z=8, V=7.622（21） nm^3, Dc=1.533 Mg/m^3, F（000）=3472, S= 1.009, R= 0.0418, wR=0.0775 and triclinic system, space group P-l, with a=1.3142（3） nm, b= 1.3761（3） nm, c=1.8503（4） nm, a =90.445（4）°,β=105.950（4）°, γ108.980（4）°, Z=2, V=3.0251（12） nm^3, Dc = 1.434 Mg/m^3, F（000）= 1316, S=1.007, R=0.0464, wR=0.1175, respectively for 1 and 2. In the structures, both of the dusters are based on a closo-type C2v 1： 2 ： 4 ： 2 ： 2 RUB10 stack with the metal occupying the unique six-connected apical position. In cluster 1, the metal center has three exo-polyhedral ligands： one triphenylphosphine and two dative oxygen atoms of p-bromobenzoates. The other oxygen atoms of two p-bromobenzoate are additionally bonded to B（2） and B（3） atoms respectively, resulting in two exo-cyclic five-membered Ru-O-C-O-B rings and engendering a symmetrical conformation. The cluster 2 is a bimetallic species in which the second ruthenium is bound to the {RUB10} center via one Ru-Ru bond and two {RuHμB} bridges resulting in one closo distorted exo-polyhedral Ru（1）-Ru（2）-B（3）-B（6） tetrahedron.
