Isomerization of 5-vinyl-2-norbornene using sodium-coated catalysts

Hee Oh Ji; Sung Ahn Byoung; Jeong Sik Han; Deuk Lee Sang; Wook Kim Seung; Hyunjoo Lee

doi:10.5012/bkcs.2008.29.11.2202

Isomerization of 5-vinyl-2-norbornene using sodium-coated catalysts

Hee Oh Ji, Sung Ahn Byoung, Jeong Sik Han, Deuk Lee Sang, Wook Kim Seung, Hyunjoo Lee

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Various sodium-coated metal oxide catalysts were prepared using readily available supporting materials such as neutral γ-Al₂O ₃ (neutral alumina, N-Al₂O₃) basic γ-Al₂O₃ (basic alumina, B-Al₂O ₃), 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.

Original language	English
Pages (from-to)	2202-2204
Number of pages	3
Journal	Bulletin of the Korean Chemical Society
Volume	29
Issue number	11
DOIs	https://doi.org/10.5012/bkcs.2008.29.11.2202
Publication status	Published - 2008 Nov 20

Keywords

5-Ethylidene-2-norbornene
Double bond isomerization
EPDM rubber
Solid base catalyst

ASJC Scopus subject areas

General Chemistry

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10.5012/bkcs.2008.29.11.2202

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title = "Isomerization of 5-vinyl-2-norbornene using sodium-coated catalysts",

abstract = "Various sodium-coated metal oxide catalysts were prepared using readily available supporting materials such as neutral γ-Al2O 3 (neutral alumina, N-Al2O3) basic γ-Al2O3 (basic alumina, B-Al2O 3), 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 (pKBH ≥ 27) and one-electron donor sites on the Na/Al2O3 is prerequisite for the isomerization of VNB to take place.",

keywords = "5-Ethylidene-2-norbornene, Double bond isomerization, EPDM rubber, Solid base catalyst",

author = "Ji, {Hee Oh} and Byoung, {Sung Ahn} and Han, {Jeong Sik} and Sang, {Deuk Lee} and Seung, {Wook Kim} and Hyunjoo Lee",

year = "2008",

month = nov,

day = "20",

doi = "10.5012/bkcs.2008.29.11.2202",

language = "English",

volume = "29",

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journal = "Bulletin of the Korean Chemical Society",

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T1 - Isomerization of 5-vinyl-2-norbornene using sodium-coated catalysts

AU - Ji, Hee Oh

AU - Byoung, Sung Ahn

AU - Han, Jeong Sik

AU - Sang, Deuk Lee

AU - Seung, Wook Kim

AU - Lee, Hyunjoo

PY - 2008/11/20

Y1 - 2008/11/20

N2 - Various sodium-coated metal oxide catalysts were prepared using readily available supporting materials such as neutral γ-Al2O 3 (neutral alumina, N-Al2O3) basic γ-Al2O3 (basic alumina, B-Al2O 3), 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 (pKBH ≥ 27) and one-electron donor sites on the Na/Al2O3 is prerequisite for the isomerization of VNB to take place.

AB - Various sodium-coated metal oxide catalysts were prepared using readily available supporting materials such as neutral γ-Al2O 3 (neutral alumina, N-Al2O3) basic γ-Al2O3 (basic alumina, B-Al2O 3), 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 (pKBH ≥ 27) and one-electron donor sites on the Na/Al2O3 is prerequisite for the isomerization of VNB to take place.

KW - 5-Ethylidene-2-norbornene

KW - Double bond isomerization

KW - EPDM rubber

KW - Solid base catalyst

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DO - 10.5012/bkcs.2008.29.11.2202

M3 - Article

AN - SCOPUS:57349186755

SN - 0253-2964

VL - 29

SP - 2202

EP - 2204

JO - Bulletin of the Korean Chemical Society

JF - Bulletin of the Korean Chemical Society

IS - 11

ER -

Isomerization of 5-vinyl-2-norbornene using sodium-coated catalysts

Abstract

Keywords

ASJC Scopus subject areas

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