Komplexkatalyse. XXXII. Synthese und Charakterisierung von η3-Allyl-, η3-Crotyl-und η1,η2-Cyclooct-4(Z)-en-1-yl-nickel(II)-bis(brenzcate-chinato)-borat und ihre Eignung als Katalysatoren für die stereospezifische Butadienpolymerisation |
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| Authors: | R Taube E Weckmann P Bhme J-P Gehrke |
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| Institution: | R. Taube,E. Weckmann,P. Böhme,J.-P. Gehrke |
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| Abstract: | Complex Catalysis. XXXII. Synthesis and Characterization of η3-Allyl-, η3-Crotyl-, and η1,η2-Cyclooct-4(Z)-en-1-yl-nickel(II)-bis(brenzcatechinato)borate and their Suitability as Catalysts for the Stereospecific Butadiene Polymerization By reaction of (η3-C3H5)2Ni], (η3-C4H7)2Ni], and Ni(cycloocta-1,5-diene)2] with one equivalent bis(brenzcatechinato)boric acid HB(O2C6H4)2 in ether the complexes given in the title could be synthesized in good yields. The allyl complex η3-C3H5NiB(O2C6H4)2] reacts with cycloocta-1,5-diene (COD) to give a cationic complex η3-C3H5Ni(COD)]B(O2C6H4)2 and catalyses the 1,4-trans-polymerization of butadiene with an activity of ca. 150 ml C4H6/mol Ni · h and a selectivity of 78% under standard conditions at room temperature. |
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