Two copper complexes ¹⁷Fnac₂Cu(C₆H₆) (3) and ¹⁷Fnac₂CuCO (4) containing the monoanionic, perfluorinated β-diketiminate ¹⁷Fnac₂⁻ ligand (1) (¹⁷Fnac₂ = FC[C(CF₃)N(C₆F₅)]₂) were synthesized and characterized by IR and NMR spectroscopy (¹H, ¹³C, ¹⁹F), cyclovaltammometry (CV), elemental analysis and single crystal X-ray diffraction. The perfluorinated ¹⁷Fnac₂⁻ ligand marginally reduces the π-back-bonding capacity of the copper centre to the carbonyl group in 4 when compared with the corresponding ¹⁶Fnac₂⁻ substituted complexes but substantially when compared with the fluorine free substituted derivatives. Quantum chemical calculations gave deeper insight into the bonding situation of this carbonyl complex, while CV studies were performed to determine the oxidation potential of 3 in solution. Based on these data, the influence of the degree of fluorination in different β-diketimine ligands on the electronic nature of the corresponding copper complexes is discussed.

中文翻译：

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全氟化β-二酮化合物的电子效应对羰基铜配合物的键合性质的影响。

两个铜络合物¹⁷ Fnac的₂的Cu（C ₆ H ^ ₆）（3）和¹⁷ Fnac的₂ CUCO（4），其含有单阴离子，全氟化β-二亚胺基¹⁷ Fnac的₂ ^-配体（1）（¹⁷ Fnac的₂ = FC [C（CF ₃）N（C ₆ F ₅）] ₂）的合成和红外光谱（¹ H，¹³ C，¹⁹F），循环伏安法（CV），元素分析和单晶X射线衍射。所述全氟化¹⁷ Fnac的₂ ^-配体略微降低了铜中心与羰基中的π-背面接合容量4时与相应的比较¹⁶ Fnac的₂ ^-当与无氟取代的衍生物相比取代的配合物，但基本上。量子化学计算更深入地了解了该羰基配合物的键合情况，同时进行了CV研究以确定3的氧化电位。在解决方案中。基于这些数据，讨论了不同β-二酮亚胺配体中氟化程度对相应铜配合物电子性质的影响。