and 735 cm 1 analysis calculated for c 14 h 4 n 6 o 10 f 6 c 31 71 h 0 76 n 15 85 f 21 50 found c 31 90 h 0 80 n 15 64 f 21 49 dry hydrogen chloride is bubbled over a three hour period into a stirring suspension of 5 0 g 0 0094 moles of 2 6 di trifluoroacetamido 1 4 5 8 tetranitronaphthalene and 500 ml of methanol at room temperature during addition of hcl the temperature of the reaction mixture is allowed to rise freely to approximately 50 u00b0 c after addition is completed the methanol is removed under reduced pressure with a warm water bath the remaining residue is treated with 300 ml of water and the resulting suspension is stirred until a finely divided powder is present the solid is filtered washed thoroughly with water and then dried in vacuo to afford 3 12 g 98 yield of product having a melting point of 280 u00b0 c decomposition the 1 h nmr acetone d 6 dmso d 6 1 1 v v spectrum shows peaks at u03b49 23 2h s arh and 8 93 4h br s nh 2 the ir spectrum shows peaks at 3300 d nh 2 1610 c u2550 c 1530 no 2 1350 1320 1250 no 2 865 and 760 cm 1.