Diiron Azamonothiolates by the Scission of Dithiadiazacyclooctanes by Iron Carbonyls

作者：Lin Tai; Ulloa Olbelina A; Rauchfuss Thomas B^*; Gray Danielle L

来源：European Journal of Inorganic Chemistry, 2014, 2014(25): 4109-4114.

DOI：10.1002/ejic.201402413

• Iron
• Cluster compounds
• Enzyme models
• Hydrogenase models
• Thiolates

The reactions of [Fe-3(CO)(12]) with the dithiadiazacyclooctanes [SCH2N(R)CH2](2) (R = Me, Bn) afford the diiron complexes [Fe-2{SCH2N(R)CH2}(CO)(6)] (1(Me), 1(Bu)). The methyl derivative 1(Me) was characterized crystallographically [Fe-Fe = 2.5702(5)] angstrom]. Its low symmetry was verified by variable-temperature C-13 NMR spectroscopy, which revealed that the turnstile rotation of the {S(CH2) Fe(CO)(3)} and {S(NMe)-Fe(CO)(3)} centers are subject to very different energy barriers. Although 1(Me) resists protonation, it readily undergoes substitution by tertiary phosphines, first at the {S(CH2) Fe(CO)(3)} center, as verified crystallographically for [Fe-2{SCH2N(Me) CH2}(CO)(5)(PPh3)]. Substitution by the chelating diphosphine Ph2PCH2CH2PPh2 (dppe) gave [Fe-2{SCH2N(Me)CH2}(CO)(4)-(dppe)] by substitution at both the {S(CH2) Fe(CO)(3)} and {S(NMe) Fe(CO)(3)} sites.

• 出版日期2014-9