KCN and sodium cyanide ( NaCN ) are widely used in organic synthesis for the preparation of nitriles and carboxylic acids , particularly in the von Richter reaction .
PROPN CCONJ NOUN NOUN ( PROPN ) AUX ADV VERB ADP ADJ NOUN ADP DET NOUN ADP NOUN CCONJ ADJ NOUN , ADV ADP DET PROPN PROPN NOUN .