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The C=C double bond for a trans-cyclooctene is relatively short 1.33 A vs. 1.347 A for trans-2-butene. Provide rationalization for this.
Double Bond of cyclic systems is generally shorter than the ordinary double bond.
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- Account for the fact that addition of HCl to 1-bromopropene gives exclusively 1-bromo-1-chloropropane.Which of the statement is INCORRECT? a. The increase in stability of 2,4-hexadiene over 1,3-hexadiene is due to the increased double bond substitution of the former. b. The stabilization of dienes by conjugation is less pronounced than the aromatic stabilization of benzene. c. Resonance description in alkenes usually involves charge separation. d. Higher energy pi-orbitals often have decreasing number of nodes.Polymer PXX has a glass transition temperature of 49°C. Describe the molecular conformation and arrangement of this polymer
- The German chemist Wilhelm Kӧrner (1839-1925) observed in 1974 that each of the three isomers of dibromobenzene, A, B, and C, gave a different number of tribromobenzenes upon further bromination, allowing him to assign their respective structures. Try to do the same and assign structures to A, B, and C based on the following results: A gives two tribromobenzenes in comparable amounts B gives three tribromobenzenes, one of them in minor quantities C gives only one tribromobenzeneWrite a brief introduction of cis --> trans isomerization of congo red and what occurs.Classify the following dienes and polyenes as isolated, conjugated, cumulated, or some combination of theseclassifications. ) cycloocta-1,3,5,7-tetraene
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- A compound with the formula C5H6 takes up 2 moles of H2 on catalytic hydrogenation. Give one possible structure that would fit the information given.Explain conformational analysis of cyclohexane.Calculate the index of hydrogen deficiency for 1-hexene, C6H12, and account for this deficiency by reference to its structural formula.