{"title":"镍络合物催化乙烯均匀寡聚反应的螯合控制","authors":"Wilhelm Keim, Rolf P. Schulz","doi":"10.1016/0304-5102(94)00050-6","DOIUrl":null,"url":null,"abstract":"<div><p>The impact of various <em>k</em><sup>2</sup>-P⌢O chelate ligands on nickel catalysed ethylene oligomerization has been investigated. The ligands <strong>4-8</strong> and <strong>14, 15</strong> were reacted with bis(π-methallyl)nickel yielding seven new complexes, <strong>9-13</strong> and <strong>16, 17</strong> in which the <em>k</em><sup>2</sup>-P⌢O chelate ring size was altered and in which methyl substituents were introduced into the <em>k</em><sup>2</sup>-P⌢O chelate. These complexes served as precursor complexes leading to active ethylene oligomerization catalysts. Increasing the chelate ring size from a five-membered to a six or seven-membered ring diminishes catalytic activity dramatically. However, by introducing double bonds or an aromatic ring into the six-membered nickelaheterocycle yielded very active ethylene oligomerization systems. Introducing methyl groups into Ph<sub>2</sub>PCH(CH<sub>3</sub>)COOH (<strong>14</strong>) and Ph<sub>2</sub>PC(CH<sub>3</sub>)<sub>2</sub>COOH (<strong>15</strong>) also leads to a significant increase in activity.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":"92 1","pages":"Pages 21-33"},"PeriodicalIF":0.0000,"publicationDate":"1994-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-5102(94)00050-6","citationCount":"81","resultStr":"{\"title\":\"Chelate control in the nickel-complex catalysed homogeneous oligomerization of ethylene\",\"authors\":\"Wilhelm Keim, Rolf P. Schulz\",\"doi\":\"10.1016/0304-5102(94)00050-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The impact of various <em>k</em><sup>2</sup>-P⌢O chelate ligands on nickel catalysed ethylene oligomerization has been investigated. The ligands <strong>4-8</strong> and <strong>14, 15</strong> were reacted with bis(π-methallyl)nickel yielding seven new complexes, <strong>9-13</strong> and <strong>16, 17</strong> in which the <em>k</em><sup>2</sup>-P⌢O chelate ring size was altered and in which methyl substituents were introduced into the <em>k</em><sup>2</sup>-P⌢O chelate. These complexes served as precursor complexes leading to active ethylene oligomerization catalysts. Increasing the chelate ring size from a five-membered to a six or seven-membered ring diminishes catalytic activity dramatically. However, by introducing double bonds or an aromatic ring into the six-membered nickelaheterocycle yielded very active ethylene oligomerization systems. Introducing methyl groups into Ph<sub>2</sub>PCH(CH<sub>3</sub>)COOH (<strong>14</strong>) and Ph<sub>2</sub>PC(CH<sub>3</sub>)<sub>2</sub>COOH (<strong>15</strong>) also leads to a significant increase in activity.</p></div>\",\"PeriodicalId\":16567,\"journal\":{\"name\":\"分子催化\",\"volume\":\"92 1\",\"pages\":\"Pages 21-33\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0304-5102(94)00050-6\",\"citationCount\":\"81\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"分子催化\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0304510294000506\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Chemical Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"分子催化","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304510294000506","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
Chelate control in the nickel-complex catalysed homogeneous oligomerization of ethylene
The impact of various k2-P⌢O chelate ligands on nickel catalysed ethylene oligomerization has been investigated. The ligands 4-8 and 14, 15 were reacted with bis(π-methallyl)nickel yielding seven new complexes, 9-13 and 16, 17 in which the k2-P⌢O chelate ring size was altered and in which methyl substituents were introduced into the k2-P⌢O chelate. These complexes served as precursor complexes leading to active ethylene oligomerization catalysts. Increasing the chelate ring size from a five-membered to a six or seven-membered ring diminishes catalytic activity dramatically. However, by introducing double bonds or an aromatic ring into the six-membered nickelaheterocycle yielded very active ethylene oligomerization systems. Introducing methyl groups into Ph2PCH(CH3)COOH (14) and Ph2PC(CH3)2COOH (15) also leads to a significant increase in activity.
期刊介绍：
Journal of Molecular Catalysis (China) is a bimonthly journal, founded in 1987. It is a bimonthly journal, founded in 1987, sponsored by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, under the supervision of Chinese Academy of Sciences, and published by Science Publishing House, which is a scholarly journal openly circulated both at home and abroad. The journal mainly reports the latest progress and research results on molecular catalysis. It contains academic papers, research briefs, research reports and progress reviews. The content focuses on coordination catalysis, enzyme catalysis, light-ribbed catalysis, stereochemistry in catalysis, catalytic reaction mechanism and kinetics, the study of catalyst surface states and the application of quantum chemistry in catalysis. We also provide contributions on the activation, deactivation and regeneration of homogeneous catalysts, solidified homogeneous catalysts and solidified enzyme catalysts in industrial catalytic processes, as well as on the optimisation and characterisation of catalysts for new catalytic processes.
The main target readers are scientists and postgraduates working in catalysis in research institutes, industrial and mining enterprises, as well as teachers and students of chemistry and chemical engineering departments in colleges and universities. Contributions from related professionals are welcome.
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