D. Bourissou et al., Ligand properties of 1H-diphosphirenes and diphosphirenylium salts towardsiron carbonyl fragments, CHEM COMMUN, (16), 1999, pp. 1535-1536
Treatment of eta(1)-[1,3-bis(diisopropylamino)-1H-diphosphirene]tetracarbon
yl iron 2 with trifluoromethanesulfonic acid affords the binuclear [3-diiso
propylaminodiphosphirenylium salt] iron complex 5, which reacts with diisop
ropylamine giving the opened binuclear iron complex 3.