Explain in detail the observed absorption maxima (from the UV-vis spectrum) for the following compounds:
( For reference, A=ebC--> Beer's law)
Please include effects of steric hindrance and conjugation on the observed absorption
1.nitrobenzene, max absorption=252 nm (e=8620)
2. 2-nitrotolunene, max absorption=250 nm (e=5950)
3. 2-isopropylnitrobenzene, max absorption=247 nm (e=3760)
4. 2-t-butylnitrobenzene, no peak in this region