The effect of alkyl substituents in nickelocenes on the catalytic dimerization of ethylene |
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| Authors: | Z. M. Dzhabieva V. P. Mar'in G. P. Belov |
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| Affiliation: | (1) Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation;(2) Scientific and Research Institute of Chemistry, N. L Lobachevsky Nizhnii Novgorod State University, 23 prosp. Gagarina, 603600 Nizhnii, Novgorod, Russian Federation |
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| Abstract: | (C5H4i-Pr)2Ni exhibits the highest catalytic activity in the dimerization of ethylene among the nickelocenes, (C5H4R)2Ni (R = H, Et,n-Pr,i-Pr, ori-Bu) and their analogs (C5H4R)Ni(C3H5) (R = H,i-Pr). The higher activity is accompanied by lower selectivity with respect to 1-butene and with higher yields of 1-hexene. It is suggested that the introduction of an alkyl substituent in the cyclopentadienyl ring of nickelocene favors the generation of  hydride sites involving the nickel atom. These sites participate in the process of ethylene dimerization.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 970–972, May, 1993. |
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| Keywords: | substituted nickelocene ethylene dimerization butene catalytic activity selectivity |
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