Solutions of PtH 2 (PMe 3 ) 2 exist as a mixture of cis and trans isomers Addition of excess PMe 3 led to formation of PtH 2 (PMe 3 ) 3 at a concentration that could be detected using NMR This complex exchanged phosphine ligands rapidly with the trans isomer but not the cis Propose a pathway What a...

The pathway for the rapid exchange of phosphine ligands with the trans isomer of PtH2PMe32 can b ...

Solutions of [PtH 2 (PMe 3 ) 2 ] exist as a mixture of cis and trans

Question:

Solutions of [PtH₂(PMe₃)₂] exist as a mixture of cis and trans isomers. Addition of excess PMe₃ led to formation of [PtH₂(PMe₃)₃] at a concentration that could be detected using NMR. This complex exchanged phosphine ligands rapidly with the trans isomer but not the cis. Propose a pathway. What are the implications for the trans effect of H versus PMe₃?