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I'm not an expert teacher or lecturer of chemistry. I was only a student from SMA NEGERI 15 SURABAYA who had been one of the Bronze Medalist Participants of Olimpiade Sains Nasional X (2011) of Chemistry In Manado, North Sulawesi, 11 - 16 September 2011 and graduated in 2012. Now, I'm studying at Universitas Airlangga in Surabaya, Indonesia. I do love chemistry and I would like to help them who had difficulties in studying chemistry. That's why, please understand me if you found some misconcepts in my entries. Suggestions are always necessary in order to develop this blog. And I'm sorry because my English isn't so well.

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Saturday, June 30, 2012

Reactive Arene Compounds

If you hear this word, "Aromatic compound" you will think it's a Benzene, won't you?

Yes, Benzene is one of aromatic compounds in this world. But benzene and its derivatives are not the only aromatic compound. If you ever hear Ferosene (Sorry, I don't know its name in English) [C5H5-Fe-C5H5], Anthracene, and Naphthalene than you just heard another aromatic compound.

Not all of aromatic compound are unreactive. Especially for polycyclic aromatic compounds are reactive in addition reaction. Benzene is unreactive because the phi-electrons distribution in benzene are distributed equivalently but the phi-electrons distribution in Naphthalene aren't.

Another prove. The calculation of length of C - C bond in Naphthalene shows that not all length are the same. See the figure as follows:

 

There's a C=C length (1.42 A) in Naphthalene. As we thought before, Naphthalene can experience addition reaction!

Examples:

 

In summary: Nothing is perfect.
Thank you.

Bibliography:
Wikipedia
Organic Chemistry by Fessenden & Fessenden
 

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