Henry: You forgot to mention Allen and Senoff.
Henry: Allen and Senoff. They made the first dinitrogen complex from ruthenium, [Ru(NH3)5(N2)]2+. That news caused quite a stir back in 1965. Ruthenium rhymes with iron, so you're also speculating about molybdenum. It could be iron doing the fixing in nitrogenase. Never sell iron short.
Henry: I'm glad to see that you're reading and keeping up with newer stuff. Barry told me you'd be back.