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・ Cyanippus
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・ Cyaniriodes libna
・ Cyaniriodes siraspiorum
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・ Cyano radical
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・ Cyano-S1 RNA motif
・ Cyanoacetamide
Cyanoacetic acid
・ Cyanoacetylene
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Cyanoacetic acid : ウィキペディア英語版
Cyanoacetic acid

Cyanoacetic acid is an organic compound. It is a white, hygroscopic solid. The compound contains two functional groups, a nitrile and a carboxylic acid. It is a precursor to cyanoacrylates, components of adhesives.〔Harald Strittmatter, Stefan Hildbrand and Peter Pollak Malonic Acid and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry 2007, Wiley-VCH, Weinheim. 〕
==Preparation and reactions==
Cyanoacetic acid is prepared by treatment of chloroacetate salts with sodium cyanide followed by acidification.〔 Electrosynthesis by cathodic reduction of carbon dioxide and anodic oxidation of acetonitrile also affords cyanoacetic acid.
Cyanoacetic acid is used to do cyanoacetylation, first convenient method described by J. Slätt.
It is about 1000x more acidic than acetic acid, with a pKa of 2.5. Upon heating at 160 °C, it undergoes decarboxylation to give acetonitrile:
: C3H3NO2 → C2H3N + CO2

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