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    • 72. 发明授权
    • Tantalum and niobium catalysts or catalyst precursors
    • 钽和铌催化剂或催化剂前体
    • US4231947A
    • 1980-11-04
    • US32
    • 1979-01-02
    • Richard R. Schrock
    • Richard R. Schrock
    • C07F9/00C07F9/02
    • C07F9/02C07F9/00
    • Tantalum and niobium catalysts or catalyst precursors of the formula: ##STR1## wherein R is cyclopentadienyl, which can be substituted with methyl up to five positions, or neopentylidene, R.sup.1 is neopentyl or benzyl, n is 0 or 1, R.sup.2 is neopentylidene, benzylidene, tetramethylene, or 2,3-dimethyltetramethylene, A is halo or a moiety of the formula YR.sup.3 R.sup.4 R.sup.5 wherein Y is a group 5 element including N, P, As, Sb and Bi and R.sup.3, R.sup.4, R.sup.5 can be the same or different and are C.sub.1 -C.sub.4 alkyl, aralkyl such as naphthyl, neophyl, tolyl or xylyl, aryl such as benzyl or phenyl or bipyridyl and Z is tantalum or niobium. The compounds selectively dimerize 1-olefins to 1-butenes; m=1 or 2.
    • 钽和铌催化剂或下式的催化剂前体:其中R是环戊二烯基,其可以被甲基取代至五个位置,或新戊基,R1是新戊基或苄基,n是0或1,R2是新亚戊基,亚苄基 ,四亚甲基或2,3-二甲基四亚甲基,A是卤素或式YR 3 R 4 R 5的部分,其中Y是包括N,P,As,Sb和Bi的第5族元素,并且R 3,R 4,R 5可以相同或不同, 是C 1 -C 4烷基,芳烷基如萘基,烯丙基,甲苯基或二甲苯基,芳基如苄基或苯基或联吡啶基,Z是钽或铌。 该化合物选择性地将1-烯烃二聚成1-丁烯; m = 1或2。