Under　the　template　of　methyl　viologen　(MV2+=　methyl　viologen)　and　ethyl　viologen　(EV2+=　ethyl　viologen),　two　new　viologen/iodobismuthate　hybrids,　(MV)(5)(Bi2I10)(Bi2I9)(2)(1)　and　(EV)(3)(Bi4I18)　(2)　have　been　structurally　determined.　The　highly　interesting　feature　of1lies　in　its　combination　of　two　kinds　of　dimeric　iodobismuthate　clusters,　i.e.　(Bi2I10)(4-)and　(Bi2I9)(3-)in　one　lattice　induced　by　MV2+,　which　are　constructed　from　edge-　and　face-sharing　BiI(6)octahedra　respectively.　But　the　(Bi4I18)(6-)tetramer　in2is　based　on　edge-　and　vertex-sharing　BiI(6)octahedra.　C-H　center　dot　center　dot　center　dot　I　hydrogen　bonds　contribute　to　the　formation　of　quasi-3-D　networks.　The　smaller　gap　of1might　be　led　by　more　versatile　C-H　center　dot　center　dot　center　dot　I　hydrogen　bond　interactions　due　to　the　presence　of　mixed　type　iodobismuthate　clusters.　Two　hybrids　display　reversible　thermochromism　behaviors.　Theoretical　calculation　suggests　that　the　terminal　iodine　is　dominated　in　electron　transfer　of　thermochromisms,　rather　than　bridged　iodine.