can i use benzene as a closed chain hydrocarbon example?
Answers
Answer:
No
Explanation:
Bescause benzene is an example of an aromatic compound and many aromatic compounds have a benzene ring in their structure.
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Answer:
4.04.6.4.3 Metathesis ROP systems
Many cyclic hydrocarbons containing unsaturated bonds (double or triple carbon-to-carbon bonds) can undergo ROP via metathesis reaction. These processes are usually reversible and cyclic oligomers are often observed as kinetic or thermodynamic side-products. In this section, no details of polymerization processes will be given. The interested reader can consult some reviews on metathesis polymerizations70–72 and original papers cited therein. Here, only some specific features of ring–chain equilibria in metathesis ROP (ROMP) are mentioned and briefly discussed.
Cycloolefins as well as resulting linear and cyclic oligomers and linear polymers can have cis and trans configurations at the C=C bond. Depending on the catalyst used and possible mechanisms of polymerization, we can expect various types of interconversions. Configuration of the C=C bond in monomer may be either preserved after incorporation into polymer chain or changed, or both possible configurations in polymer can be formed. Similar problems can be expected if cyclizations leading to cyclic oligomers are analyzed. Besides, if substituted cycloolefins are polymerized structural isomerism (head-to-tail and head-to-head structures) and/or tacticity has to be taken into account.
All these structural variations imply differences in linear chain conformation distributions depending on chain structure.
The observed dependence of the cyclization rate constants on the number of monomer units was often steeper than expected from the J-S theory (Kx ∼ x−2.5)