https://webbook.nist.gov/cgi/inchi?ID=C17786311&Units=CAL&Mask=200
Tetracobalt dodecacarbonyl
https://findingaids.lib.uh.edu/repositories/2/archival_objects/324923
Publication 306 "Ligand-Induced Scission of the Metal-Metal bond in a Bicapped Tetracobalt...