Fuming HNO

Fair Fair Good Good 6-90 5.0 Possibility of red fuming HNO initiating e losions good resistance to solutions containing clilorides... 

Ref 3). Prepd by addition of the parent in chlf to N205 in chlf at 0°. ater prepd by adding to the parent in Ac20 atO°, fuming HNOs in Ac sO (Ref 3)... 

COj -48.5%, OB to CO -12.1%. Plates, unstable, mp 55 62° with decompn very sol in w eth, in sol in ligioin. Was prepd by mixing acetone with nitric acid(dl. 14) and a little fuming HNO, and allowing the mixt to stand for 8 days at RT. An ether extraction gave on e-apcm seme acstylmethyi-nitrolic acid(Refs 1 2). Krauz Stepanek (Ref 3) attempted and failed to prep tetra-nitromethane by nitration of acet. Instead, they obtd (after treating the nitrated prod with silver salt) an expl compd claimed to be the Ag salt of acetylmethylnitrolic acid, CHj, , CO. C(NOj). N. 0 Ag (see also Acetone, Nitration)... 

Easily sol in ale, acet and pyridine, moderately sol in eth, insol in chlf, CC14, toluene petr eth. Was prepd by Goddard from picramic acid and thallium dimethyl iodide, Tl(CHs)2I. It probably expl, as does the diethyl salt, when moistened with fuming HNOs... 

To a cooled (—40 °C) soln of l-methyl-2-(trichloroacetyl)pyrrole (2 1.2 kg, 5.1 mol) in Ac20 (6L) in a 12-L flask equipped with a mechanical stirrer was added fuming HNO, (440 mL) over a period of lh while a temperature of —40°C was maintained. The mixture was carefully allowed to warm to rt and stirred for an additional 4 h. The mixture was cooled to —30 °C and iPrOH (6 L) was added. The soln was stirred at —20 °C for 30 min, during which time a white precipitate formed. The soln was allowed to stand for 15 min and the resulting precipitate collected by filtration to provide 3 yield 0.8 kg (54% from 1). 

Pentanitrophenylbenzyl amine, c13h8n6o6, mw 408.24, N 20.59%. Yel ndls(fron) acet), mp 274°(dec) sol in acet, AcOH hot ale v si sol in chlf eth. Was prepd by treating phenylbenzylurethane with fuming HNOs + H2S04 at a temp somewhat higher than -10°. Its expl props were not investigated... 

Titanium. There is a danger from explosions with titanium in contact with HNOa, especially the red fuming HNO, (Refs 94, 102 106)... 

CCRNOj) It yel ndls(from aq acet), mp 150 -53° readily sol in acet or ethyl acetate sol in MeOH, benz or AcOH diffc sol in petr eth was obtd, in addn to allo-ochloro -p-nitrocinnamic acid, when allo-ochloro-cinnaraic acid [CgHg.CH C(Cl),COOH] was nitrated with fuming HNO, or by nitrating normal ochlorocinnamic acid at 20-25° instead of in the cold(Refs 1 3) ... 

NitTo-7T -cymenet liq, bp 255-65 (dec) was prepd by nitrating m-cymene with cold fuming HNO (Ref 2) and 2-NitTo-p cymene, oil having a pleasant smell, bp 134 at 15mm pressure, d 1.074 at 20 , 1 5301 at 20 , Qvapzn 1410 kcal/mol may be prepd by nitration of p-cymene with mixed HNO / acid or by other methods (Ref 3) and... 

V si sol in chlf eth. Was prepd by treating phenylbenzylurethane with fuming HNO, + HjSO at a temp somewhat higher than -10°. 

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