The electronic and steric effects of a series of neutral and ionic (mono-/di-)phosphines on the performance of Ir(I)-complex catalysts for the hydroaminomethylation of olefins were systematically investigated by means of ¹J³¹P-⁷⁷Se coupling constant measurement, single-crystal X-ray diffraction, and high pressure in situ FTIR spectroscopy. It was found that the neutral mono-phosphines of L1 with the moderate π-accepting nature (¹J³¹P-⁷⁷Se of 753 Hz) and relatively less steric hindrance was able to spur the activities of the corresponding Ir-catalysts. In addition, the catalytic performances over the Ir(I)- and Rh(I)-precursors was compared under the same reaction conditions. The advantages of Ir(I)-catalyst over Rh(I)-catalyst for this tandem reaction were also discussed in detail.

通过¹ J ³¹ P- ⁷⁷ Se偶联对一系列中性和离子（单-/二-）膦对Ir（I）络合物催化剂的烯烃加氢甲基化性能的电子和空间效应进行了系统研究。恒定测量，单晶X射线衍射和高压原位FTIR光谱。发现具有中等π接受性质的L1的中性单膦（¹ J ³¹ P- ⁷⁷Se（753 Hz）和相对较少的空间位阻能够刺激相应的Ir催化剂的活性。此外，在相同的反应条件下，对Ir（I）-和Rh（I）-前体的催化性能进行了比较。还详细讨论了Ir（I）催化剂比Rh（I）催化剂在串联反应中的优势。