Synthesis of polymers containing biarenes

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SUMMARY

The discussion centers on the synthesis of polymers containing biarenes, specifically exploring the potential of using biphenyl as a ligand in metallocene structures. Participants confirm that metallocenes, like Ferrocene, involve bonding between a metal's d orbitals and the pi molecular orbitals of aromatic compounds. The proposed structure involves alternating biphenyl ligands bonded to metals, forming a polymer chain. The feasibility of this concept is acknowledged, although practical implementation may present challenges.

PREREQUISITES
  • Understanding of metallocenes and their structures
  • Knowledge of coordination chemistry and ligand bonding
  • Familiarity with aromatic compounds and their electronic properties
  • Basic principles of polymer chemistry
NEXT STEPS
  • Research the synthesis and properties of Ferrocene and other metallocenes
  • Explore the electronic structure of biphenyl and its implications in coordination chemistry
  • Investigate polymerization techniques for creating coordination polymers
  • Study the stability and reactivity of polymeric metallocene complexes
USEFUL FOR

Chemistry students, researchers in coordination chemistry, and polymer scientists interested in the synthesis and application of metallocene-based polymers.

chem1234
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I am a high school chemistry AP student. In class, my teacher told us about how benzene's delocalized ∏ electrons can donate to a metal but it is not a strong bond. I wanted to know if it was possible to make a coordination compound that was also a polymer by using a biarene ligand, one end would attach to the metal, the other end to another, and so on. I also was curious as to the specifics of how benzene donates the e-s.
Thanks
 
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The types of compounds you are talking about are called metallocenes, or "sandwich compounds." The most well described one is Ferrocene. They're the result of a bond between one of the metal's d orbitals and the pi molecular orbital of the benzene ring (or other aromatic compound), which is situated above and below the plane of the ring.

I think I see what you're proposing: are you thinking of using a compound such as biphenyl, which has two aromatic rings that are not in conjugation with each other? Then there would be a metallocene bond to each ring by separate metals, and to the other side of the metal would be a ring from another biphenyl molecule, arranged such that the chain could be extended.. something like [Fe-(biphenyl)-Fe-(biphenyl)-Fe-(biphenyl)]n ?

Sounds reasonable in that I can't immediately think of a reason why it wouldn't work. Actually doing it sounds tricky, though. It would probably make a groovy helix as it stretches out. Your AP Chem teacher sounds awesome.
 
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