6.(10 Pts.) Explain in some detail trans effect and trans influence. Use these ideas to explain why bubbling CO into a solution of [PtCl4]2- recovers exclusively cis-Pt(CO)2Cl2. How would you make the trans isomer?
The trans effect, which is often called the kinetic trans effect, refers to the observation that certain ligands increase the rate of ligand substitution when positioned trans to the departing ligand. Trans effect is kinetic effect.
The trans influence refers to the impact of a ligand on the length of the bond trans and other properties to it in the ground state of a complex. It is a thermodynamic effect.
CO has higher trans effect than Cl ligand.
cis-isomers do not form on bubbling CO into [PtCl4]2- because CO ligand with direct the second CO molecule trans to it and hence trans isomer is formed.
Starting [Pt(CO)4], cis isomers can be formed, Cl has less trans effect therefore second Cl have go trans to CO ligand.
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