This is another paper by F.A. Cotton on (of course) multiple metal-metal bonds. It was basically a lecture he gave in ACS Seattle (1983). Not surprisingly he summarizes multiple M-M bonding starting as early as mid 18th century. So, I got to learn a lot from this paper that I had not known. There is also a really interesting quote and talk by Linus Pauling on metal-metal bonding where he tries to describe a few Mo-Mo, W-W and Ta-Ta bonds. Cotton also confesses that he had heard about Pauling's paper by pure coincidence.
On the famous Re-Re multiple bonding, Cotton says :