Dimeric copper(II) trimethylsilyl­acetate adducts with pyridine, 2-­methylpyridine, 3-methylpyridine and quinoline, and a polymeric copper(II) trimethylsilylacetate

In the crystals of bis(pyridine-N)tetrakis(μ-trimethylsilylacetato-O:O′)dicopper(II), [Cu₂(C₅H₁₁O₂Si)₄(C₅H₅N)₂], (I), the dinuclear Cu^II complexes have cage structures with Cu⋯Cu distances of 2.632 (1) and 2.635 (1) Å. In the crystals of bis(2-­methylpyridine-N)tetrakis(μ-trimethylsilylacetato-O:O′)dicopper(II), [Cu₂(C₅H₁₁O₂Si)₄(C₆H₇N)₂], (II), bis­(3-methylpyridine-N)tetrakis(μ-trimethylsilylacetato-O:O′)dicopper(II), [Cu₂(C₅H₁₁O₂Si)₄(C₆H₇N)₂], (III), and bis(quinoline-N)­tetrakis(μ-­trimethylsilylacetato-O:O′)dicopper(II), [Cu₂(C₅H₁₁O₂Si)₄(C₉H₇N)₂], (IV), the centrosymmetric dinuclear Cu^II complexes have a cage structure with Cu⋯Cu distances of 2.664 (1), 2.638 (3) and 2.665 (1) Å, respectively. In the crystals of catena-poly­[tetrakis(μ-trimethylsilylacetato-O:O′)dicopper(II)], [Cu₂(C₅H₁₁O₂Si)₄]_n, (V), the dinuclear Cu^II units of a cage structure are linked by the cyclic Cu—O bonds at the apical positions to form a linear chain by use of a glide translation.