M McGraw-Hill Connect! Stu CD connect.mheducation.com/connect studentPerformance

Question

M McGraw-Hill Connect! Stu CD connect.mheducation.com/connect studentPerformance do?reportType-singlestudentSingleAssignment&print; tudentId-18030599&printids-11473543268; Score: 23°/250 Points 92% Question 7 (of 25) Show correct answer Award: 10 out of 10.00 points Your response /max for the transition in ethylene is 170 nm. Is the HOMO-LUMO energy difference in ethylene greater than or less than that of cis,trans-1,3-cyclooctadiene (230 nm)? Select the single best answer A. greater B. less eBook & Resources Periodic table Section 13 23 References Multiple Choice Difficulty:3 3:07 AM 3/4/2016 Search the web and Windows

Explanation / Answer

HOMO is the highest occupied moleclular orbit and LUMO is the lowest unoccupied molecular orbit. In pi to pi* transition in diene involves excitation of electron from HOMO to LUMO. In ethylene HOMO-LUMO energy is greater. As the wavelength increases energy decreases and vice versa. Since in ethylene wavelength is less energy more energy is required for pi to pi* transition.

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.