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Rare-earth-metal mixed hydride/aryloxide complexes bearing mono(cyclopentadienyl) ligands. Synthesis, CO(2) fixation, and catalysis on copolymerization of CO(2) with cyclohexene oxide
Cui, Dongmei1,2; Nishiura, Masayoshi1; Tardif, Olivier1; Hou, Zhaomin1
2008-06-09
Source PublicationORGANOMETALLICS
ISSN0276-7333
Volume27Issue:11Pages:2428-2435
AbstractHydrogenolysis of mono(cyclopentadienyl)-ligated rare-earth-metal bis(alkyl) complexes Cp'Ln-(CH(2)SiMe(3))2(THF) (Ln = Y (1a), Dy (1b), Lu (1c); Cp' = C(5)Me(4)SiMe(3)) with PhSiH(3) afforded the mixed hydride/alkyl complexes [Cp'Ln(mu-H)(CH(2)SiMe(3))(THF)](2) (Ln = Y (2a), Dy (2b), Lu (2c)). The overall structure of complexes 2a-c is a C(2)-symmetric dimer containing a planar symmetric Ln(2)H(2) core at the center of the molecule. Deprotonation of ArOH (Ar = C(6)H(2)-(t)Bu(2)-2,6-Me-4) by the metal alkyl group of 2a-c led to formation of the mixed hydride/aryloxide derivatives [Cp'Ln(mu-H)(OAr)](2) (Ln = Y (3a), Dy (3b), Lu (3c)), which adopt the dimeric structure through hydride bridges with trans-accommodated terminal aryloxide groups. Complexes 3a-c swiftly reacted with CO(2) to generate the mixed formate/carbonate complexes [Cp'Ln(mu-eta(1):eta(1)-O(2)CH)(mu-eta(1):eta(1)-O(2)COAr)](2) (Ln = Y (4a), Dy (4b), Lu (4c)). The two Cp'Ln fragments in these complexes are bridged by the formate and carbonate species, respectively, to form two square-pyramidal geometries around the metal centers. Furthermore, complexes 3a-c initiated the copolymerization of CO(2) and cyclohexene oxide (CHO) under mild conditions to afford polymers with modest molecular weights and high carbonate linkages (92-99%).
DOI10.1021/om800170x
Indexed BySCI ; CCR
Language英语
WOS IDWOS:000256232600009
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:62[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64478
Collection中国科学院化学研究所
Corresponding AuthorHou, Zhaomin
Affiliation1.RIKEN, Organomet Chem Lab, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Cui, Dongmei,Nishiura, Masayoshi,Tardif, Olivier,et al. Rare-earth-metal mixed hydride/aryloxide complexes bearing mono(cyclopentadienyl) ligands. Synthesis, CO(2) fixation, and catalysis on copolymerization of CO(2) with cyclohexene oxide[J]. ORGANOMETALLICS,2008,27(11):2428-2435.
APA Cui, Dongmei,Nishiura, Masayoshi,Tardif, Olivier,&Hou, Zhaomin.(2008).Rare-earth-metal mixed hydride/aryloxide complexes bearing mono(cyclopentadienyl) ligands. Synthesis, CO(2) fixation, and catalysis on copolymerization of CO(2) with cyclohexene oxide.ORGANOMETALLICS,27(11),2428-2435.
MLA Cui, Dongmei,et al."Rare-earth-metal mixed hydride/aryloxide complexes bearing mono(cyclopentadienyl) ligands. Synthesis, CO(2) fixation, and catalysis on copolymerization of CO(2) with cyclohexene oxide".ORGANOMETALLICS 27.11(2008):2428-2435.
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