Monobipyridine complexes of ruthenium (4,4â²-L2-2,2â²-bpy)Ru(CO)2Cl2 (L = H, Me, t-Bu, Cl, Br, H2PO3, NO2) were synthesised and structurally characterised. The electronic effects of the substituents L on vibration and absorption spectra were studied using both experimental and theoretical methods, calculations were carried out with the density functional hybrid B3PW91 and HartreeâFock ab initio methods. The energy differences between the HOMO and LUMO orbitals of the complexes depended on the electron withdrawing properties of the bipyridine substituents. The electronic effects of the substituents were observed as a correlation between the spectra (λmax and νCO bands) and the electronic character of the substituents.
合成并结构表征了单取代
吡啶配合物 (4,4'-
L2-
2,2'-bpy)Ru(CO)2C
L2(L = H, Me, t-Bu, Cl, Br, H2PO3,
NO2)。通过实验和理论方法研究了取代基L对振动和吸收光谱的电子效应,计算使用了密度泛函混合B3PW91和Hartree–Fock从头开始的方法。配合物HO
MO和LU
MO轨道之间的能量差依赖于双
吡啶取代基的电子吸引性。观察到取代基的电子效应与光谱(λmax和νCO带)及取代基的电子性质之间存在相关性。