A series of novel asymmetric bidentate phosphines with ortho‑fluorine substituents was developed and characterized. In combination with chromium, the compound gave high activity to 1-hexene and 1-octene (approaching 3200 kg/g Cr/h) and high combined selectivity (C₆-C₈ > 95% in selected examples). With fluorine atoms at the ortho-position, the compound could be operable at a higher temperature without activity loss.

中文翻译：

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用邻氟芳基膦配体官能化的乙烯三聚/四聚铬催化剂

开发和表征了一系列具有邻氟取代基的新型不对称双齿膦。与铬组合，该化合物对1-己烯和1-辛烯具有很高的活性（接近3200 kg / g Cr / h），并且具有很高的组合选择性（ 在选定的示例中，C ₆ -C ₈ > 95％）。由于氟原子在邻位，该化合物可以在更高的温度下操作而没有活性损失。