METHOD OF PRODUCING STABLE ARYLDIAZONIUM SALTS Russian patent published in 2010 - IPC C07C245/20 C07C255/09 

FIELD: chemistry.

SUBSTANCE: method is described for producing stable aryldiazonium salts with an organic anion. The method involves two stages. First, aryldiozonium chloride is obtained by reacting chloride solution of an aromatic amine with sodium nitrite, taken in equimolar quantities at 0°C and mixing for 1 hour. Further, the obtained aqueous solution of aryldiazonium chloride is mixed with a saturated solution of 1,1,2,3,3-pentacyanopropenide pyridinium heated to 60-70°C and taken in amount of 2 mmol per 2.1 mmol of initial amine. The exchange reaction results in formation of 1,1,2,3,3- pentacyanopropenide aryldizonium of different composition depending on the structure of diazotised aromatic amines which are stable at 5-10°C for 2-3 months.

EFFECT: simple technology and improved environmental friendliness due to use of readily available starting materials and synthesis in aqueous medium.

2 cl, 1 tbl, 10 ex