3404-75-9Relevant articles and documents
Impact of Alkali and Alkali-Earth Cations on Ni-Catalyzed Dimerization of Butene
Ehrmaier, Andreas,L?bbert, Laura,Sanchez-Sanchez, Maricruz,Bermejo-Deval, Ricardo,Lercher, Johannes
, p. 3705 - 3711 (2020/06/08)
The presence of alkali (Na+ or Li+) or alkali-earth (Ca2+ or Mg2+) cations adjusting the acid-base properties on amorphous silica-alumina influences markedly the catalytic properties of supported Ni for 1-butene dimerization. The low concentration of Br?nsted acid sites on these catalysts reduces the double bond isomerization of butene and inhibits the formation of dimethylhexene as primary product. While the alkali and alkali-earth cations act as weak Lewis acid sites, only Ni2+ sites are catalytically active for dimerization of 1-butene. n-Octene and methylheptene are formed selectively as primary products; dimethylhexene is a secondary product. The open environment of the Ni2+ sites does not induce different reaction pathways compared to Ni2+ in the pores of zeolites.
Cyclization of methyl-substituted 6-heptenyl radicals
Bailey, William F.,Longstaff, Sarah C.
, p. 2217 - 2219 (2007/10/03)
(Matrix presented) The behavior of a series of methyl-substituted 6-heptenyl radicals, generated from the corresponding iodides ((Me3Si)3SiH, AIBN in benzene at 80°C), has been investigated. The stereoselectivity of the 6-exo cyclizations, affording dimethylcyclohexanes, is low, and sizable quantities of methylcycloheptane, generated via 7-endo cyclization, are also produced.