Author Question: When an organic molecule is irradiated with ultraviolet radiation, the energy absorbed by the ... (Read 57 times)

savannahhooper · **on:** Aug 23, 2018

When an organic molecule is irradiated with ultraviolet radiation, the energy absorbed by the molecule corresponds to:
a. the amount necessary to increase molecular motions in functional groups
b.the amount necessary to excite electrons from one molecular orbital to another
c.the amount necessary to flip the spin of atomic nuclei
d.the amount necessary to strip a molecule of one electron to generate a radical cation

Question 2

For Diels-Alder cycloaddition reactions to take place most rapidly and in highest yield the dienophile must:
a. be substituted with electron-withdrawing groups
b. be able to adopt an s-trans conformation
c. be substituted with electron-donating groups
d. be able to adopt an s-cis conformation