Related InterviewSolutions

• Consider A Homogeneous Zirconium Catalyst In Which Two Cyclopentadienyl Ligands Are Connected By A —ch2–ch2— Bridge. Which Symmetry Elements Does The (bridged-cp2)zr Moiety Possess? What Is The Expected Tacticity Of The Polypropylene Produced Using This Type Of Catalyst? Why?
• Explain What Is Meant By "c2 Symmetry" And "mirror Plane Symmetry". Can A Molecule With "mirror Plane Symmetry" Ever Be Chiral?
• What Does It Mean For A Molecule Or A Ligand To Be "chiral"? What Properties Does Chirality Impart To A Molecule?
• Atactic Polypropylene Is Always Produced With The [cp2zr(r)]+ Catalyst. Explain This On The Basis Of Molecular-level Interactions.
• Head-to-tail Polymerization Of Propylene Is Observed With The [cp2zr(r)]+ Catalyst. Explain This Result On The Basis Of Molecular-level Interactions.
• Consider The Polymerization Of 1,2-dichloroethylene, H(cl)c=c(cl)h. What Structural Variations Are Possible In Poly(1,2-dichloroethylene)?
• Consider The Polymerization Of Vinylidene Chloride, Ch2=ccl2. What Structural Variations Are Possible In Poly(vinylidene Chloride)?
• A Polymer's Structure Influences Its Physical Properties. Describe Two Structural Variations That Are Possible For Polypropylene But Not For Polyethylene.
• "co-polymers" Consist Of Two Different Monomers ("a" And "b") Joined In An Alternating Fashion (ababab...). Block Co-polymers Also Consist Of Two Different Monomers, But In This Case Blocks Of Polymer Containing Only A Units Are Joined To Blocks Of Polymer Containing Only B Units (aaaaabbbbb...). How Might Block Co-polymers Be Synthesized?
• What Are The Other Ways In Which Chemists Can Manipulate The Properties Of Polymers?