title: Diiron Azamonothiolates via Scission of Dithiadiazacyclooctanes by Iron Carbonyls.
abstract: The reaction of Fe3(CO)12with the dithiadiazacyclooctanes [SCH2N(R)CH2]2affords Fe2[SCH2N(Me)CH2](CO)6(R = Me, Bn). The methyl derivative1Mewas characterized crystallographically (Fe-Fe = 2.5702(5) Å). Its low symmetry is verified by variable temperature13C NMR spectroscopy which revealed that the turnstile rotation of the S(CH2)Fe(CO)3and S(NMe)Fe(CO)3centers are subject to very different energy barriers. Although1Meresists protonation, it readily undergoes substitution by tertiary phosphines, first at the S(CH2)Fe(CO)3center, as verified crystallographically for Fe2[SCH2N(Me)CH2](CO)5(PPh3). Substitution by the chelating diphosphine dppe (Ph2PCH2CH2PPh2) gave Fe2[SCH2N(Me)CH2](CO)4(dppe), resulting from substitution at both the S(CH2)Fe(CO)3and S(NMe)Fe(CO)3sites.
authors.affiliation: School of Chemical Sciences, University of Illinois, Urbana, IL 61801, United States.
authors.forename: Tai
authors.initials: T
authors.lastname: Lin
authors.affiliation: School of Chemical Sciences, University of Illinois, Urbana, IL 61801, United States.
authors.forename: Olbelina A
authors.initials: OA
authors.lastname: Ulloa
authors.affiliation: School of Chemical Sciences, University of Illinois, Urbana, IL 61801, United States.
authors.forename: Thomas B
authors.initials: TB
authors.lastname: Rauchfuss
authors.affiliation: School of Chemical Sciences, University of Illinois, Urbana, IL 61801, United States.
authors.forename: Danielle L
authors.initials: DL
authors.lastname: Gray