Oh, Ji Hee Ahn, Byoung Sung Han, Jeong-Sik Lee, Sang Deuk Kim, Seung Wook Lee, Hyunjoo 2024-01-20T22:30:34Z 2024-01-20T22:30:34Z 2021-09-03 2008-11-20 0253-2964 https://pubs.kist.re.kr/handle/201004/132973 Various sodium-coated metal oxide catalysts were prepared using readily available supporting materials such as neutral gamma-Al2O3 (neutral alumina, N-Al2O3) basic gamma-Al2O3 (basic alumina, B-Al2O3), SiO2, MgO, and TiO2, and their catalytic activities were evaluated for the isomerization of 5-vinyl-2-norbornene (VNB) to 5-ethylidene-2-norbornene (ENB). Of various sodium-coated catalysts, Na/N-Al2O3 and Na/B-Al2O3 showed extremely high activities, resulting in quantitative conversion of VNB. Catalyst characterization and isomerization results clearly demonstrated that the presence of both strong basic sites (pK(BH) >= 27) and one-electron donor sites on the Na/Al2O3 is prerequisite for the isomerization of VNB to take place. English WILEY-V C H VERLAG GMBH SUPERBASIC CATALYSTS ALKYLATION SILICA Isomerization of 5-Vinyl-2-norbornene Using Sodium-coated Catalysts Article 1 BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.29, no.11, pp.2202 - 2204 BULLETIN OF THE KOREAN CHEMICAL SOCIETY 29 11 2202 2204 scie scopus kci ART001525647 000262091500023 2-s2.0-57349186755 Chemistry, Multidisciplinary Chemistry Article SUPERBASIC CATALYSTS ALKYLATION SILICA Double bond isomerization 5-Ethylidene-2-norbornene EPDM rubber Solid base catalyst