B3LYP level. Proton nuclear shielding constants have been calculated with the 6-311G++(2d) basis set, and geometry optimizations have been carried out employing the LanL2Dz basis set for osmium and the 3-21G or 6-31G(d) basis sets for the other atoms. Calculated and experimental results have been compared with a satisfactory level of agreement. The complete assignment of the proton spectrum of 2, in good
[Os(bpy)2(CO)(Cl)] [(PF 6)](1)和[Os(bpy)2(CO)(H)] [(PF 6)](2的X射线结构)(其中bpy =
2,2'-联吡啶)已解决。在复杂的1,属于Ç 2 / ç空间群中,
氯-和CO的
配体被静态沿两个几乎正交的方向无序的,并且这种疾病可能由CO和Cl的立体相似性进行说明-的基团。相反,在络合物2中,CO和
氢化物配体非常不同,[Os(bpy)2(CO)(H)]部分未显示任何异常。通过DFT计算获得了配合物1的无序结构和配合物2中
氢化物位置的更准确模型。结合1D和2D NMR实验以及理论计算,完成了完整的1 H NMR
化学位移分配。实验1借助于GIAO(包括原子规)方法,在B3LYP级进行的磁屏蔽常数计算已完全解释了H NMR数据。质子核屏蔽常数已使用6-311G ++(2d)基组进行了计算,并且使用employing的Lan
L2Dz基组和其他原子的