This　work　reports　the　synthesis　of　a　1,3-linked　tetracyclopentadienylcobalt-cyclobutadiene　macrocycle　([CpCoCb]　4　)　via　Pt-templated　cyclization.　Structural　characterization　by　SCXRD　confirms　a　C　i　-symmetric　nanohoop　(1.5　nm　diameter).　Unique　CH-pi　interactions　drive　the　1D　channel　packing.　Electrochemical　studies　reveal　multiredox　activity.　This　work　establishes　a　new　paradigm　for　strained　organometallic　architectures　with　potential　applications　in　multistate　molecular　electronics　and　host-guest　systems.