A multimetallic iron(ii)–lithium complex as a catalyst for ε-caprolactone polymerization. Issue 40 (7th April 2016)

• Record Type: Journal Article
• Authors: Geng, Chao; Peng, Ying; Wang, Lijuan; Roesky, Herbert W.; Liu, Kaipeng
• Is Part Of: Dalton transactions. Volume 45:Issue 40(2016)
• Page Start: 15779
• Page End: 15782
• Publication Date: 2016-04-07
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt00078a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Treatment of the lithium salt of β-ketimine with FeCl2 (THF)1.5 in the presence of LiN(SiMe3 )2 and water affords the multimetallic iron(ii )–lithium complex1, [(L Me )2 Fe]3 Li2 O [where L Me = MeC(O)CHC(NMe)Me]. Abstract : Treatment of the lithium salt of β-ketimine with FeCl2 (THF)1.5 in the presence of LiN(SiMe3 )2 and water affords the multimetallic iron(ii )–lithium complex1, [(L Me )2 Fe]3 Li2 O [where L Me = MeC(O)CHC(NMe)Me]. In complex1 three separated (L Me )2 Fe units are bound together by one Li2 O species, which leads to the formation of an interesting {Fe3 Li2 O} core structure. Complex1 can be used as a single-component initiator for the ring-opening polymerization of ε-caprolactone at room temperature, achieving a monomer conversion of 98% within 100 min, and a narrow molecular weight distribution (PDI = 1.28) of the resulting polymer.