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- Title
The Roles of 3- and 4-Isopropylbiphenyls in the Isopropylation of Biphenyl over a H-Mordenite.
- Authors
Sugi, Y.; Sugimura, T.; Tawada, S.; Kubota, Y.; Hanaoka, T.; Matsuzaki, T.
- Abstract
The isopropylation of mixtures of 3- and 4-isopropylbiphenyls (3- and 4-IPBPs) was examined over a dealuminated H-mordenite (HM) to elucidate the role of 3- and 4-IPBPs in the isopropylation of biphenyl (BP). 4-IPBP was consumed much faster than 3-IPBP in all cases. 4-IPBP was an exclusive precursor to diisopropylbiphenyls (DIPBs), particularly 4,4′-DIPB, and 4,4′-DIPB was found in encapsulated products during the reaction. These results show that 4-IPBP can allow establishment of an active complex with propylene and acid site in HM pores, whereas 3-IPBP cannot. It is concluded that the isopropylation of BP over HM occurs through a reactant selectivity mechanism, and through a restricted transition state mechanism, but not through a product selectivity mechanism.
- Publication
Catalysis Letters, 2001, Vol 77, Issue 1-3, p159
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1023/A:1012730910613