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Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of epsilon-caprolactone
Shen, Miao1,2; Huang, Wei1,2; Zhang, Wenjuan1,2; Hao, Xiang1,2; Sun, Wen-Hua1,2; Redshaw, Carl3
2010
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Volume39Issue:41Pages:9912-9922
AbstractThe stoichiometric reactions of 2-(benzimidazol-2-yl)-6-methylpyridine (L1) or 8-(benzimidazol-2-yl)quinaldine (L2) with trialkylaluminium reagents R(3)Al (R = Me, Et and iBu) afforded the corresponding dialkylaluminium benzimidazolate complexes R(2)AlL (L1, R = Me (1), Et (2), iBu (3); L2 R = Me (4), Et (5), iBu (6)). Treatment of L1 with one or two equivalents of Et(2)AlCl led to the adducts EtAl(L1)(2)center dot AlEtCl(2) (7) or Et(2)AlL1 center dot AlEtCl(2) (8), respectively. Complex 7 was also available via treatment of 8 with one equivalent of L1. Reaction of L1 with two equivalents of AlR(3) (R = Me or Et) afforded R(2)AlL1 center dot AlR(3) (R = Me, 9; R = Et, 10), which were also formed when 1 or 2 were reacted with AlR(3). Reaction of L2 with two equivalents of AlR(3) (R = Me or Et) gave the complexes R(2)AlL2 center dot AlR(3) (R = Me, 11; R = Et, 12), which were also formed in the stoichiometric reaction of 4 or 5 with AlR(3) (R = Me or Et). Screening of these complexes in the presence of BnOH, for the ring-open polymerisation of epsilon-caprolactone, revealed appreciable activities. Only the aluminium compounds ligated by 2-(benzimidazol-2-yl)-6-methylpyridine maintained high activity in the absence of BnOH. In all cases, polymers with bi- or multi-modal characteristics were produced.
DOI10.1039/c0dt00514b
Indexed BySCI
Language英语
WOS IDWOS:000282808500021
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:55[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/69660
Collection中国科学院化学研究所
Corresponding AuthorSun, Wen-Hua
Affiliation1.Chinese Acad Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
3.Univ E Anglia, Sch Chem, Norwich NR4 7TJ, Norfolk, England
Recommended Citation
GB/T 7714
Shen, Miao,Huang, Wei,Zhang, Wenjuan,et al. Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of epsilon-caprolactone[J]. DALTON TRANSACTIONS,2010,39(41):9912-9922.
APA Shen, Miao,Huang, Wei,Zhang, Wenjuan,Hao, Xiang,Sun, Wen-Hua,&Redshaw, Carl.(2010).Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of epsilon-caprolactone.DALTON TRANSACTIONS,39(41),9912-9922.
MLA Shen, Miao,et al."Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of epsilon-caprolactone".DALTON TRANSACTIONS 39.41(2010):9912-9922.
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