Homework help starts here! Why toluene is more reactive towards electrophilic substitution - Byju's All of the carbon-carbon bonds are identical to one another. Generally, central ring of anthracene is considered more reactive than the other two rings and -complex at the C9-position of anthracene could be stabilized by two benzene rings which might prevent rearomatization [28] . Symmetry, as in the first two cases, makes it easy to predict the site at which substitution is likely to occur. What is the structure of the molecule named p-phenylphenol? I think this action refers to lack of aromaticity of this ring. Explain why fluorobenzene is more reactive than chlorobenzene toward electrophilic aromatic substitution but chloromethylbenzene is more reactive than fluoromethylbenzene. Note that the orientations in each category change depending on whether the groups have similar or opposite individual directing effects. Some examples follow. How do you get out of a corner when plotting yourself into a corner. The list of activating agents includes well known reagents that activate functional groups for substitution or elimination reactions, as well as less traditional examples, e.g. The resonance stabilization energy of benzene is greater than that of these heteroaromatic compounds. Addition therefore occurs fairly readily; halogenation can give both 9,10-addition and 9-substitution products by the following scheme: Anthracene is even more reactive than phenanthrene and has a greater tendency to add at the 9,10 positions than to substituted. . Reactions of Fused Benzene Rings - Chemistry LibreTexts Why is anthracene a good diene? Can you lateral to an ineligible receiver? so naphthalene more reactive than benzene. Why benzaldehyde is less reactive than propanal? Chloro and bromobenzene reacted with the very strong base sodium amide (NaNH2 at low temperature (-33 C in liquid ammonia) to give good yields of aniline (aminobenzene). Examples of these reactions will be displayed by clicking on the diagram. Which is more reactive naphthalene or anthracene? ASK. Naphthalene is more reactive than benzene, both in substitution and addition reactions, and these reactions tend to proceed in a manner that maintains one intact benzene ring. By acetylating the heteroatom substituent on phenol and aniline, its activating influence can be substantially attenuated. When one substituent has a pair of non-bonding electrons available for adjacent charge stabilization, it will normally exert the product determining influence, examples 2, 4 & 5, even though it may be overall deactivating (case 2). Why phenol goes electrophilic substitution reaction? Thanks for contributing an answer to Chemistry Stack Exchange! 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