In the title triangulo-triruthenium compound, [Ru3(C25H22(As2)(C18H12F3P)(CO)9], the bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the phosphine and arsine ligands are equatorial with respect to the Ru3 triangle. Additionally, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three phosphine-substituted rings make dihedral angles of 87.76 (13), 57.43 (13) and 73.81 (12)° with each other. The dihedral angles between the pairs of rings are 69.78 (14) and 83.38 (16)° for the two diphenyl­arsino groups. In the crystal packing, mol­ecules are linked by inter­molecular C—H⋯F and C—H⋯O hydrogen bonds, forming two-dimensional planes parallel to the ab plane. These planes are also linked by inter­molecular C—H⋯O hydrogen bonds into a three-dimensional framework. Inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.

The asymmetric unit of title compound, C36H27As, contains two crystallographically independent mol­ecules, A and B, with similar conformations. The two phenyl rings of each biphenyl unit are twisted slightly away from each other with dihedral angles of 6.0 (2), 27.7 (3) and 33.4 (2)° in mol­ecule A and 5.7 (3), 27.5 (2) and 33.0 (2)° in mol­ecule B. The As-bonded phenyl rings make dihedral angles of 54.9 (2), 76.0 (2) and 88.2 (2),° with each other in mol­ecule A, and 60.3 (2), 78.1 (2) and 79.5 (2)° in mol­ecule B. In the crystal, the mol­ecules are stacked down the b axis. Weak inter­molecular C—H⋯π inter­actions stabilize the crystal structure. The crystal studied was a racemic twin, the refined ratio of twin components being 0.461 (7):0.539 (7).

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In the title compound, C21H21AsS3, the three benzene rings make dihedral angles of 88.41 (10), 87.75 (9) and 74.74 (10)° with each other. The methyl­sulfanyl groups are roughly coplanar with their attached benzene rings [C—S—C—C torsion angles = −7.6 (2), 11.2 (2) and 4.1 (2)°]. In the crystal, weak C—H⋯π inter­actions link the mol­ecules.

In the title triangulo-triruthenium compound, [Ru3(C25H22As2)(C18H15Sb)(CO)9], the bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate stibine ligand bonds to the third Ru atom. Both the stibine and arsine ligands are equatorial with respect to the Ru3 triangle. Additionally, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three stibine-substituted phenyl rings make dihedral angles of 84.3 (3), 80.4 (3) and 70.5 (3)° with each other. The dihedral angles between the two phenyl rings are 85.9 (3) and 75.2 (3)° for the two diphenyl­arsine groups. In the crystal packing, mol­ecules are linked into chains down the c axis via inter­molecular C—H⋯O hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.