S. N. Osmanova, S. A. Suleymanova, T. G. Zeynalova, E. H. Ismailov
{"title":"原位 DLS/EPR/GC-MS 监测基于六氯化钨和有机铝化合物的烯烃 Metathesis 反应催化体系","authors":"S. N. Osmanova, S. A. Suleymanova, T. G. Zeynalova, E. H. Ismailov","doi":"10.1007/s11237-024-09793-w","DOIUrl":null,"url":null,"abstract":"<p>Dynamic light scattering (DLS), electron paramagnetic resonance (EPR), and gas chromatography-mass spectrometry (GC-MS) methods were used to study interaction products of catalytic system components consisting of organoaluminum compounds (OAC), WCl6, and ethyl alcohol. Organic radicals (g = 2,0037, ∆H = 1,7mT) and W<sup>5+</sup> complexes (g<sub>z</sub> = 1,746, g<sub>y</sub> = 1,820, g<sub>x</sub> = 1,842, g<sub>1</sub> = 1,9957, g<sub>2</sub> = 1,9540, g<sub>3</sub> = 1,9465 at 77 K, and g<sub>0</sub> = 1.9583 at 300 K) with an additional hyperfine structure from two chlorine nuclei <sup>35,37</sup> Cl have been identified by the EPR method. The formation of such compounds is accompanied by ethane and ethylene release. It is shown that a Cl<sub>6</sub>/Et<sub>3</sub>Al (Et<sub>2</sub>AlCl)/EtOH-based catalytic system of olefin metathesis is a colloidal solution at the initial stages of the interaction of components. The further action of OAC leads to the formation of a molecular solution.</p>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In Situ DLS/EPR/GC-MS Monitoring of the Catalytic Systems Based on Tungsten(VI) Hexachloride and Organo-Aluminum Compounds for Olefin Metathesis Reactions\",\"authors\":\"S. N. Osmanova, S. A. Suleymanova, T. G. Zeynalova, E. H. Ismailov\",\"doi\":\"10.1007/s11237-024-09793-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Dynamic light scattering (DLS), electron paramagnetic resonance (EPR), and gas chromatography-mass spectrometry (GC-MS) methods were used to study interaction products of catalytic system components consisting of organoaluminum compounds (OAC), WCl6, and ethyl alcohol. Organic radicals (g = 2,0037, ∆H = 1,7mT) and W<sup>5+</sup> complexes (g<sub>z</sub> = 1,746, g<sub>y</sub> = 1,820, g<sub>x</sub> = 1,842, g<sub>1</sub> = 1,9957, g<sub>2</sub> = 1,9540, g<sub>3</sub> = 1,9465 at 77 K, and g<sub>0</sub> = 1.9583 at 300 K) with an additional hyperfine structure from two chlorine nuclei <sup>35,37</sup> Cl have been identified by the EPR method. The formation of such compounds is accompanied by ethane and ethylene release. It is shown that a Cl<sub>6</sub>/Et<sub>3</sub>Al (Et<sub>2</sub>AlCl)/EtOH-based catalytic system of olefin metathesis is a colloidal solution at the initial stages of the interaction of components. The further action of OAC leads to the formation of a molecular solution.</p>\",\"PeriodicalId\":796,\"journal\":{\"name\":\"Theoretical and Experimental Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-03-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Theoretical and Experimental Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11237-024-09793-w\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical and Experimental Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11237-024-09793-w","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
In Situ DLS/EPR/GC-MS Monitoring of the Catalytic Systems Based on Tungsten(VI) Hexachloride and Organo-Aluminum Compounds for Olefin Metathesis Reactions
Dynamic light scattering (DLS), electron paramagnetic resonance (EPR), and gas chromatography-mass spectrometry (GC-MS) methods were used to study interaction products of catalytic system components consisting of organoaluminum compounds (OAC), WCl6, and ethyl alcohol. Organic radicals (g = 2,0037, ∆H = 1,7mT) and W5+ complexes (gz = 1,746, gy = 1,820, gx = 1,842, g1 = 1,9957, g2 = 1,9540, g3 = 1,9465 at 77 K, and g0 = 1.9583 at 300 K) with an additional hyperfine structure from two chlorine nuclei 35,37 Cl have been identified by the EPR method. The formation of such compounds is accompanied by ethane and ethylene release. It is shown that a Cl6/Et3Al (Et2AlCl)/EtOH-based catalytic system of olefin metathesis is a colloidal solution at the initial stages of the interaction of components. The further action of OAC leads to the formation of a molecular solution.
期刊介绍:
Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as:
a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials;
b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions;
c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.