The cation [OsH(CO)2(PPh3)3]+ exhibits the following spectroscopic features:
Infrared υ(CO) at 1985(vs)
1H nmr A multiplet centred at -9.30 ppm (below, with line separations in Hz).
Use this information to determine which diastereomer of this complex is present. Explain how your assignment fits the data. Please see attached photo for NMR Spectrum.
Any ideas on how to solve it? I think the spectrum represents a doublet of triplets. 187Os has a spin number of 1/2 while 189Os (which has a greater natural abundance) has a spin number of 3/2. P has a spin number of 1/2. Since there is only one band for the IR, this suggests to me that two CO ligands are chemically equivalent, but I am not sure about this. Any insight or help to solve this problem would be great.