Organometallic π-tweezers incorporating pyrazine- and pyridine-based bridging units

The synthesis of heterobimetallic (TiCu, TiAg) and tetranuclear heterobimetallic (Ti2Ag2) transition metal complexes based on the organometallic π-tweezer building blocks [Ti](CCSiMe3)2 is described. In [{[Ti](μ-σ,π-CCSiMe3)2}M-LL]+ and [{[Ti](μ-σ,π-CCSiMe3)2}MLLM{(Me3SiCC-μ-σ,π)2[Ti]}]2+ (M = Cu, Ag; LL = pyrazine- or pyridine-based bridging units) the metal containing parts are spanned by π-conjugated organic bridges LL. Depending on the nature of LL coordination polymers are also accessible.