| Chromium(III) complexes bearing 2-benzazole-1,10-phenanthrolines: synthesis, molecular structures and ethylene oligomerization and polymerization | |
| Department | 羰基合成与选择氧化国家重点实验室 |
| Zhang M(张民); Wang KF(王科峰); Sun WH(孙文华) | |
| 2009 | |
| Source Publication | Dalton Transactions
 |
| ISSN | 1477-9226 |
| Pages | 6354-6363 |
| Abstract | The 2-benzazole-1,10-phenanthrolines and their chromium(III) complexes were synthesized and characterized by elemental and spectroscopic analyses as well as by single-crystal X-ray crystallography. X-Ray crystallographic analyses of C6 and C8 reveal an octahedral geometry around both chromium centers. The electronic spectra of the chromium complexes exhibit d–d transitions typically of a pseudo-octahedral coordinated d3 ion, falling into the region n1 4A2g →4T2g 600–700 nm,n2 4A2g →4T1g(F) 430–470 nm, and the 10Dq values between 15674 and 16529 cm-1. The variation of the heteroatoms (X = N, O, S) in benzazole group shows regular influence on the 10Dq values as 10Dq (O) > 10Dq (N) > 10Dq (S), which reflects the s-donor/p-acceptor properties of these benzazole ligands. Upon activation with modified methylaluminoxane (MMAO), these complexes exhibited high activities for ethylene oligomerization (up to 7.36 ¥ 106 g mol-1 (Cr) h-1) and ethylene polymerization (up to 1.28 ¥ 106 g mol-1 (Cr) h-1). The effects of non-coordinated N, O or S heteroatoms in the ligands have been examined, and interestingly catalytic activities also strictly adhered to the trend O > N > S under various ethylene pressures. Reaction conditions significantly influenced the catalytic properties of the complexes. |
| Subject Area | 物理化学 |
| Funding Organization | NSFC No. 20674089 |
| Indexed By | SCI |
| Language | 英语 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/542 |
| Collection | 羰基合成与选择氧化国家重点实验室（OSSO） |
| Corresponding Author | Sun WH(孙文华) |
| Recommended Citation GB/T 7714 | Zhang M,Wang KF,Sun WH. Chromium(III) complexes bearing 2-benzazole-1,10-phenanthrolines: synthesis, molecular structures and ethylene oligomerization and polymerization[J]. Dalton Transactions,2009:6354-6363. |
| APA | 张民,王科峰,&孙文华.(2009).Chromium(III) complexes bearing 2-benzazole-1,10-phenanthrolines: synthesis, molecular structures and ethylene oligomerization and polymerization.Dalton Transactions,6354-6363. |
| MLA | 张民,et al."Chromium(III) complexes bearing 2-benzazole-1,10-phenanthrolines: synthesis, molecular structures and ethylene oligomerization and polymerization".Dalton Transactions (2009):6354-6363. |
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| 25_Dalton Trans 2009（238KB） | 开放获取 | License | View Application Full Text | |||
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