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Eins, zwei, drei …︁: Der Einkernkomplex [{η5‐(tBu)2C4H2N}CrCl2(thf)] reagiert mit AlEt3 zu der zweikernigen Spezies [{[η5‐(tBu)2C4H2N]CrEt}2(μ‐Cl)2] (siehe Bild: Cr violett, Cl grün, C grau, H weiß). Der Komplex wirkt als Einkomponentenkatalysator für die selektive Trimerisierung von Ethylen; bei Zugabe größerer Mengen an aktivierendem AlEt3 kommt es zur Isomerisierung von 1‐Hexen zu cis/trans‐2‐Hexen.
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