Nitration is the usual way that nitro groups are introduced into aromatic rings.
This exam consists of 5 pages plus the cover page and one blank piece of paper for scratch work. Compounds from fused benzene or aromatic heterocyclic rings are themselves aromatic Naphthalene: 4n+2=10, n=2 note: Hückels rule is strictly for monocyclic aromatic compound, its application to polycyclic aromatic compounds is tenuous. NO2 CH3 Br CH3 CH3 b) (4 pts) Chlorobenzene is less reactive towards electrophilic aromatic substitution than … The structure and properties of aromatic systems were discussed in Chapter 11. They are representative of the types of long questions that will be on the final exam. 1.) A nucleophilic aromatic substitution reaction is a reaction in which one of the substituents in an aromatic ring is replaced by a nucleophile.. A Meisenheimer complex is a negatively charged intermediate formed by the attack of a nucleophile upon one of the aromatic-ring carbons during the course of a nucleophilic aromatic substitution reaction. Compounds from fused benzene or aromatic heterocyclic rings are themselves aromatic Naphthalene: 4n+2=10, n=2 note: Hückels rule is strictly for monocyclic aromatic compound, its application to polycyclic aromatic compounds is tenuous. Experiment 16 – Electrophilic Aromatic Substitution Page 7 of 8 B. a) Rank the following compounds according to their reactivitiy towards electrophilic aromatic substitution by numbering them from 1 to 4 where 1 is the most reactive and 4 the least reactive. p-substitution than o-substitution 5) The incoming group replaces a hydrogen, it will not usually displace a substituent already in place (in the case of electrophilic aromatic substitution) Directing effect if more than one substituent is present Before starting the exam, check to make sure that you have all of the pages. 28 15.10: Spectroscopy of Aromatic Compounds IR: Aromatic ring C–H stretching at 3030 cm−1 and 4 points each 1. Why will the following reaction not occur as written? 28 15.10: Spectroscopy of Aromatic Compounds IR: Aromatic ring C–H stretching at 3030 cm−1 and Experimental Procedure 1. For product ratios, the two easiest peaks to use are at 4.21 (5H in monoacetylferrocene) and 4.16 (10H in ferrocene). A key for the practice problems will be posted next Wednesday. Hello Dear Examtrix.com (Exam Tricks) followers, In this post we are going to share an important PDF on One Word Substitution PDF for Competitive exam, Download free PDF of One Word Substitution for all Competitive Exams such as SSC CGL, SSC CHSL, MBA, LIC, GIC, Banks, Railways, LIC, CDS, NDA, which is very useful for each and every competitive exam in India. (Notice that either of the oxygens can accept the electron pair.)