Which structures are aromatic? Make your call based on the electron distributions shown here, not on possible resonance structures.
Which structures are aromatic? Make your call based on the electron distributions shown here, not on...
25. Which structures are aromatic? Make your call based on the electron distributions shown here, not on possible resonance structures. :0: = a) II, III b) III, IV c) I, III d) I, IV Chem 236 Spring 2020 26. Arrange the compounds in order of increasing reactivity toward electrophilic aromatic substitution (lowest first). a) III <I<IV<II b) I<III < II <IV c) II<I<IV <III d) III <II <I<IV
4. Answer the following questions based on the electrophilic aromatic substitution reaction shown below. door a. (2.5pts) Based on the identity of the substituent on the starting material and its interaction with the aromatic ring, is this substituent an activator or deactivator? Briefly explain your answer and support your answer with structures b. (5.5pts) Draw all of the resonance contributors of the o-complexes that lead to each of the three possible products. c. (0.5p) Based on the structures drawn in...
4 points Saved QUESTION 7 Consider the following structures I-IV. Which two species represent resonance structures? :0: N -H II III IV - I and II ll and IV I and IV I and in
Which, if any of the following structures are NOT reasonable resonance structures of "T"? III IV C III and V III and IV D II and IV E all are reasonable II and V Select one: OB O O O Clear my choice
Aromaticity
Page 19 of 90 14. Which of these structures can be classified as aromatic? (A) I, II, and III (C) I and III only (B) II and III only (D) II only 15. Which structure is not aromatic? (A) CH3 (B) CH3 13 髟
Which of the following are possible resonance structures of the intermediate species formed during the Electophillic Aromatic Substitution reaction? NH2 VA NH2 NH good commanding Br L III IV V
Which of the following
structures are reasonable monomers for addition polymerization?
13. Which of the following structures are reasonable monomers for addition polymerization? CH2OH CI H O OH он H2N Ol H C 2 он (iv) IV (a) i only (b) ii and iv (c) ii, iii, and iv (d) i and iii (e) iii only
Which alkene would you expect to have the lowest heat of hydrogenation? III IV I II III IV Which pair does not represent a pair of resonance structures? and and and ШI IV and O I O II O III O IV All of these choices represent pairs of resonance structures.
Which compound would you NOT expect to be aromatic? :00: O: -I E I Д IV V ΟΙ Ο ΙΙ O III O IV O v
Which one of the following compounds is consistent with the following IR spectrum? % Transmittance turum 08077 1500 Ποόο soo Wavenumber (cm) H I Ο Ι II Ο Ο Ο Ο Ο III IV O v If the frequency of vibration for a C-F bond corresponds to a wavenumber of ~1000 cm-1, then the frequency of vibration for a C-Br bond would be > 1000 cm-1 < 1000 cm-1 1000 cm-1. not possible to determine without more information. Which mass...