شیمی کاربردی*آلی،تجزيه،معدني،شيمي فيزيك*
Procedure. Place 0.5 mL or 0.4 g of the dry compound in a clean, dry test tube; add one crystal of azoxybenzene and about 25 mg of anhydrous aluminum chloride. Note the color. If no color is produced immediately, warm the mixture for a few minutes. Wait for up to 30 min to observe any color change.