Olefins can bind to metal centers. Consider the simplest homoleptic complex, the

Question

Olefins can bind to metal centers. Consider the simplest homoleptic complex, the bis(ethylene) complex. Ethylene binds to a metal through its p Pi-orbitals. What is a point group of this complex? Prove that an irreducible representation for p Pi-orbitals interaction in this molecule has four orbital symmetries appropriate for ligand binding to the metal which are A_1, B_2, and E. Below are shown the p-orbital contours for four orbitals. Color the p-orbitals to give the proper orbital symmetries. Label each of the completed diagrams with its irreducible representation. if M happens to be Cu. match p PI-orbitals of ligands with the appropriate orbitals of Cu.

Explanation / Answer

it is quite efficient as non-coordinating anion and you can treat it with an olefin, a suitable olefin a weak complex is formed. It is weak complex becausethe metal is ready to give electrons to the antibonding orbitals of the olefin, It was quite difficult, because the back bonding is poor. The interaction convenient, for establishing an equilibrium. This weak interaction is sufficient to distinguish between various olefin complexes. The stability constant of two different olefins, if they are different, if you can have the Cis and trans isomers of two butene, The stability difference is able to differentiate between these two olefin complexes, in terms of the stability constant. all the examples either there is an assisted of a ligand from the coordination sphere, of a metal complex, and that vacant coordination sphere is occupied by an olefin. The metal and olefin cheated complex called entropic effect, the chelate effect which leads to more stable complexes. if it has to thermodynamically viable, the complex that is formed must be much more stable.

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