4,5-Bis(terpyridyl)-2,7-di-tert-butyl-9,9-dimethylxanthene (btpyxa) was prepared to serve as a new bridging ligand via Suzuki coupling of terpyridin-4'-yl triflate and 2,7-di-teil-butyl-9,9-dimethylxanthene-4,5-diboronic acid. The reaction of btpyxa with either 1 equiv or an excess of PtCl2(cod) (cod = 1,5-cyclooctadiene) followed by anion exchange afforded mono- and dinuclear platinum complexes [(PtCl)(btpyxa)](PF6) ([1](PFO) and [(PtCl)(2)(btpyxa)](PF6)(2) ([2]-(PF6)(2)), respectively. The X-ray crystallography of [1](PF6)-CHCl3 revealed that the two terpyridine units in the ligand are nearly parallel to each other. The heterodinuclear complex [(PtCl){Ru((t)Bu(2)SQ)(dmso)}(btpyxa)](PF6)(2) ([4](PF6)(2)) (dmso = dimethyl sulfoxide; (t)Bu(2)SQ = 3,5-di-tert-butyl-1,2-benzosemiquinone) and the monoruthenium complex [Ru((t)Bu(2)SQ)(dmso)(trpy)](PF6) ([5](PF6)) (trpy = 2,2':6',2"-terpyridine) were also synthesized. The CV of [2](2+) suggests possible electronic interaction between the two Pt(trpy) groups, whereas such an electronic interaction was not suggested by the CV of [4](2+) between Pt(trpy) and Ru((t)Bu(2)SQ) frameworks.