Which of the following would show the longest wavelength in its UV spectrum? Exp

Question

Which of the following would show the longest wavelength in its UV spectrum? Explain

I know that:

1. B

2. B?

3. C

4 and 5 ?

UVSPECTROSCOPY 1. 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 molccule of one electron to generate a radical cation 2. A physical constant that is the quantitative measure of the amount of UV light absorbed by a compound. a. absorbante b. molar absorptivity 3. The amount of energy in electromagnetic radiation is related to the frequency and wavelength of the radiation. High energy radiation like gamma rays is of: low frequency and short wavelength low frequency and long wavelength high frequency and short wavelength high frequency and long wavelength a. b. c. d. 4. Which of the following would show the longest wavelength max in its UV spectrum? Explain. >.Circle any conjugated portions in thc molccules below H2C

Explanation / Answer

1-b

2-c

3-a

4-b because of extended conjugation with carbonyl functionality

5 -expect b, remaing all molecule having adjucent double bonds , ( i can draw the but now i am not able to write)

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