Hide Tiner 01:21:07 roblem 15 01:21:07 Problem 19.35 ) 26 0150 (0) oblem 19 Part

Question

Hide Tiner 01:21:07 roblem 15 01:21:07 Problem 19.35 ) 26 0150 (0) oblem 19 Part A spectrum s UV apter 19 Check all that apply. A UV spectrum results from the electron system. The lone pair electrons on the nitrogen in aniline are delocalized into the benzene ring and, thus, are part of the system Protonation of aniline removes one electron rom the system This has a sinificant effect on its UV spectrum the system Protonation of aniline removes two electrons from the system This has a significant effect on its UV spectrum The lone pair electrons on the nitro en atom n pyridine are p2 electrons and thus are not part of the system Protonation of pyridine, therefore, does not spectrum results rom the electron system The one pair electrons on the rto en in a line are de ocalzed to the benzene rin and thus, are part of remove any electrons from the system and has only a minor effect on the UV spectrum blem 19 The lone-pair e s on the nitrogen atom in pyndne are sp 2 electrons and thus are not part of the system Protonation of pyridine there ore does not remove any electrons from the system and has only a minor effect on the UV spectrum TV spectrum results from the electron system The one electron on the nitrogen in aniline is delocazed into the benzene ring and, thus, is a part of the system Protonation of aniline removes one electron from the system This has a significant effect on its UV spectrum blem 19 systern Protonation oi pyridine, therefore, does not remove any The one electron on the nitrogen atom in pyridine is sp electrons from the system and has only a minor effect on the UV spectrum electron and, thus is not part of the blem 19 :30 PM

Explanation / Answer

Answers are two options (2) and (3).

A UV spectrum results from the pi electron system. Protonation of aniline removes two electrons from the pi system.

The lone pair in pyridine is sp2 hybridised and doesn't take part in pi system. And hecne removal has minor effect on the UV spectrum.

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