ChemistryAdvancedHigh School (11–12)Organic Chemistry: Some Basic Principles and Techniques › Electronic Effects and Reaction IntermediatesNEETJEE Main
Created by StemPy LabA student draws the four structures I to IV in the figure and claims that all of them are resonance structures of propenal, . 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?
← All Quizzes
← Match 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. H⁺ attacks ethene, and the π electrons move to the carbon that takes the H⁺ D. CN⁻ attacks the carbon of a C=O group, and the π electrons move to the oxygen List-II (Effect) I. -E effect II. +R effect III. -R effect IV. +E effectAssertion (A): Both nitrogen-oxygen bonds of nitromethane, CH₃NO₂, have the same length, which lies between the length of an N-O single bond and that of an N=O double bond. Reason (R): Nitromethane is a mixture of two forms, I and II, which turn into each other so fast that the two bonds look equal on average. →
Discussion (0)
Log in to join the discussion.
Loading…