An investigation into the anion dependence of the network-forming ability of metal complexes of hexamethylenebis(acetamide), CH₃CONH(CH₂)₆NHCOCH₃ (HMBA), has resulted in the X-ray characterization of the compounds [Co(HMBA)₃][Co(NCS)₄], 1, [Nd(HMBA)₃][Nd(NO₃)₆]·2CHCl₃, 2, [Co(HMBA)₃][HgCl₄], 3, and [Mn(HMBA)₃][HgBr₄]·3CHCl₃, 4. The structures of compounds 1, 3, and 4 each comprise cationic frameworks formed by the bridging action of HMBA ligands binding octahedrally to the cobalt or manganese centers and, in the cases of 3 and 4, the formation of tetrahedral HgX₄^2- anions by transfer of the respective halide ions from Co or Mn to Hg. Complete anion (NO₃^-) transfer between Nd centers is also a key factor in the structure of 2, which forms a cationic 3-D network of HMBA-bridged octahedrally coordinated Nd centers with occluded [Nd(NO₃)₆]^3- anions. These types of inter-metal-anion transfer, with consequent complex counteranion formation, appear to facilitate the network-forming ability of the metal−HMBA cationic arrays.