Task: Text Categorization
Input (English): A cyclobutane containing this functional group is yielded after adipic acid reacts in the Franchimont reaction. Hydrolysis of trichloromethyl aryl ketimines produces an aromatic compound of this functional group in Houben-Fischer synthesis. Von Braun degradation produces compounds with this functional group, compounds that can also be produced from diazonium in the Sandmeyer reaction. Acidic hydrolysis of compounds with this function group produces carboxylic acids, while neutral hydrolysis produces ammonium salts of carboxylic acids. The tendency of this functional group to evolve a certain noxious gas leads to its alternative name of cyano. For ten points, identify this functional group, which consists of a carbon triple-bonded to a nitrogen.
Output (English): Science