The first unsymmetric monosilanylene-bridged 2,2′-bis(indenyl) system, 1,1′-(2,2′-C 9 H 6 ) 2 -Si(Me)(t-Bu) (3c), was synthesized in the same manner as the disilanylene and disiloxanylene systems. Furthermore, a series of dinuclear complexes with these double-bridged ligands were reacted with appropriate metal fragments, yielding 1 10b) for cobalt. All compounds were obtained as the antifacial isomer, except complex 8a, where a mixture of the syn and anti species was obtained. The redox behavior of 8a was investigated by cyclic voltammetry in CH 2 Cl 2 . The structures of 6b and 8a were determined by X-ray diffractometry.