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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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Tuesday, January 03, 2012

Hunsdiecker Reaction

The Hunsdiecker reaction (also called the Borodin reaction after Alexander Borondin) is the organic reaction of silver salts of carboxylic acids with halogens to give organic halides. It is an example of a halogenation reaction. The reaction is named after Heinz Hunsdiecker and Cläre Hunsdiecker.



Mechanism Reaction


We can modify this reaction with this:
RC≡CH + MX → RC≡CM + HX (MX = NaNH2, LiBu, RMgX)
RC≡CM + R'-Br → RC≡CR' + MBr

The reactions of alkynes with certain metal cations, e.g. Ag+ also gives acetylides. Thus, few drops of diamminesilver(I) hydroxide (Ag(NH3)2OH) reacts with terminal alkynes signaled by formation of a white precipitate of the silver acetylide. When the silver acetylide reacts with an alkyl halide, it will give a precipitate of silver halide and an alkyne.

Further Reading . . .
Wikipedia


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