Abstract: Eight compounds of Rh coordinated catalyst are synthesized and measured by ¹H and ¹³C NMR. The spectral lines are assigned and some correlations are found. Some coupling constants are determined. The structures of these compounds are decided.
We found that a coordinated product of trans-effect is not a pure trans compound but a 2:1 (trans:cis) mixture of isomers.
When ligand is a β-diketone in solution, the structure of Rh-coordinated compound is somewhat distorted, especially the CH₃, group, CH₃ has its abnormal behavior both in ¹H and ¹³C NMR.