Ring-opening metathesis polymerization of norbornene by Cp*2Os2Br4 and related compounds

被引:49
作者
Brumaghim, JL [1 ]
Girolami, GS [1 ]
机构
[1] Univ Illinois, Sch Chem Sci, Urbana, IL 61801 USA
关键词
D O I
10.1021/om980434r
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The dinuclear complex Cp*2Os2Br4 (Cp* = pentamethylcyclopentadienyl) and related mono(pentamethylcyclopentadienyl)osmium compounds are catalysts for the ring-opening metathesis polymerization (ROMP) of norbornene, The most active catalyst prepared to date is made by treatment of Cp*2Os2Br4 with methylaluminoxane. This catalyst polymerizes norbornene with yields up to 167 kg of polymer per mol of catalyst at room temperature. The C-13 NMR spectra show that the polymer is slightly blocky and that cis double bonds predominate. The polymer is insoluble in organic solvents but is swelled by many of them.
引用
收藏
页码:1923 / 1929
页数:7
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