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- W2114560445 abstract "Abstract Summary: The neodymium trisborohydride Nd(BH 4 ) 3 (THF) 3 (THF = tetrahydrofuran) has been used as a catalyst precursor for isoprene polymerization for the first time. Associated to an excess of Al(Et) 3 , the resulting catalyst is moderately active, giving a mixture of cis ‐ and trans ‐ polymer. Addition of a stoichiometric amount of MgBu 2 to Nd(BH 4 ) 3 (THF) 3 affords a stereospecific catalyst providing trans ‐1,4‐polyisoprene, more than 96% regular. That dual component Nd/Mg system also shows a better efficiency and good control of the molecular weights. A molecular structure is tentatively attributed to a bimetallic active species, based on 1 H NMR experiments. Possible Nd/Al and Nd/Mg active initiating species. image Possible Nd/Al and Nd/Mg active initiating species." @default.
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- W2114560445 date "2004-04-01" @default.
- W2114560445 modified "2023-10-16" @default.
- W2114560445 title "Stereospecific Polymerization of Isoprene with Nd(BH4)3(THF)3/MgBu2 as Catalyst" @default.
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- W2114560445 doi "https://doi.org/10.1002/marc.200300289" @default.
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