ChemistryAdvancedHigh School (11–12)Organic Chemistry: Some Basic Principles and Techniques › Electronic Effects and Reaction IntermediatesNEETJEE Main
Created by StemPy LabMatch each displacement of electrons in List-I with the effect in List-II. List-I (Situation) A. The nitrogen lone pair of aniline is delocalised into the ring B. The ring π electrons of nitrobenzene are drawn towards the nitro group C. attacks ethene, and the π electrons move to the carbon that takes the D. attacks the carbon of a group, and the π electrons move to the oxygen List-II (Effect) I. effect II. effect III. effect IV. effect
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← The figure shows four carbocations, I to IV, drawn as bond-line formulas. Their stability depends on how many alkyl groups the positive carbon carries, through the inductive effect and hyperconjugation. Which option gives the order of stability, from the most stable to the least stable, and the number of C-H bonds that can take part in hyperconjugation in the most stable ion?A student draws the four structures I to IV in the figure and claims that all of them are resonance structures of propenal, CH₂=CH-CHO. By NCERT's rules, resonance structures keep every nucleus in the same place and differ only in where the electrons are. How many of I to IV are resonance structures of propenal, and which of them contributes most to the resonance hybrid? →
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