Copper(I) (±)-N,Nâ²-bis(2,4,6-trimethylbenzylidene)-1,2-diaminocyclohexane reacts with either ethene or butadiene to give the corresponding alkene complexes. In each case crystallographic studies show that the alkene coordinates in an η2 fashion. In the butadiene complex a dimer is formed where the butadiene bridges two copper complexes. Variable temperature NMR spectroscopy of the ethene adduct demonstrates fluxional behaviour, which is attributed to the rotation of the coordinated ethene relative to the complex, ÎGâ¡255 = 50 ± 2 kJ molâ1.
铜(I) (±)-N,N'-双(2,4,6-三甲基苯亚甲基)-
1,2-二氨基环己烷与
乙烯或
丁二烯反应形成相应的烯烃配合物。在每种情况下,晶体学研究表明烯烃以η²方式配位。在
丁二烯配合物中,形成一个二聚体,其中
丁二烯桥接两个
铜配合物。
乙烯加合物的可变温度NMR光谱显示出流动行为,这归因于配位
乙烯相对于配合物的旋转,ΔG‡255 = 50 ± 2 kJ mol⁻¹。