A single carbon atom controls the geometry and reactivity of Co^II(N₂S₂) complexes

Three- vs. two-carbon N-to-N connectors give rise to monomeric, tetrahedral N2S2Co(ii) (mu(eff) = 4.24 BM) or dimeric [(N2S2)Co(ii)](2) (diamagnetic) complexes, respectively. Differences in the derivative products of the Lewis acid receivers, W-0(CO)(3) and W-0(CO)(4), illustrate nucleophilicity of the thiolate sulfur lone pairs in each case, as well as their structural control.