Ferric acetylacetonate

Eight-membered rings may be formed thermally or photochemically (see PhotochemicalTOCHNOLOGy). Excellent yields can be obtained with ferric acetylacetonate—triethylaluminum—dipyridyl (43). 

The proplnts developed by Aerojet (Ref 3) use v small amts of ferric acetylacetonate as the catalyst or polymerization agent. Proplnts developed by JPL (Ref 2) use hexamethylene diisocyanate as the copolymer of PGN, together with a nitric ester plasticizer and ferric acetylacetonate as the curing catalyst. 

Dicyclo diepoxy carboxylate (UNOX 221) 3.09 Ferric acetylacetonate 0.15... 

Aluminum citrate Chromium sulfate Ferrochromo-lignosulfonate Manganese nitrate Potassium hichromate Sodium bichromate Ferric acetylacetonate Ammonium ferric oxalate... 

The elastomers crosslinked with LHT-240, including the Tri-NCO formulation, contained 0.03% dibutyltin dilaurate as a curing catalyst and were cured in closed molds (see below) for 8 hours at 100°C. Preliminary experiments showed that such a formulation after cure for either 4 or 8 hours at 100°C swelled the same amount in benzene and contained the same amount of extractable material, termed sol. The elastomer crosslinked with TIPA contained 0.02% ferric acetylacetonate as catalyst and was cured for 24 hours at 60°C. This formulation after cure for either 24 or 48 hours was found to swell the same amount in benzene. 

Addition of tristearyl phosphite to polyethylene containing ferric acetylacetonate has been shown to decrease the stability of the polymer towards photo-oxidation.8... 

The weak nucleophilic nature of polynitroaliphatic alcohols is also reflected in their slow reactions with isocyanates to yield carbamates. These reactions often need the presence of Lewis acids like ferric acetylacetonate or boron trifluoride etherate. The reaction of bifunctional isocyanates with polynitroaliphatic diols has been used to synthesize energetic polymers.33°... 

Ferric acetylacetonate was prepared in the usual way from freshly precipitated ferric hydroxide (m.p., 183.5°C. (d.) (corr). Found C, 50.8 H, 5.98 Fe, 15.48. Calculated for C15H21OeFe C, 50.9 H, 5.95 Fe, 15.8 weight %). N,N -Di-sec-butyl-p-phenylenediamine (DSBPD) was commercially available material (ICI Topanol M) redistilled (b.p., 105°C./0.05 mm.). Examination by infrared failed to detect any impurities. The first fraction obtained from the distillation contained p-phenyl-enediamine (2 weight % on total DSBPD). 

Iron Estimations. These were carried out by extracting the iron with "iron-free HC1 (/—0.2 p.p.m.), followed by measurement using a square w ave polarograph. Reproducibility and accuracy on samples in which known amounts of ferric acetylacetonate had been placed were poor (zb50%). Wet combustion techniques followed by estimations using the square wave polarograph gave worse results than the procedure described. 

The reactions when ferric chloride or ferric acetylacetonate is present occur in three stages (1) an initial fast reaction decreasing in rate, (2) an arrest during which the oxidation rate may be very low, and (3) a "sigmoid phase in which an autocatalytic reaction is finally overtaken by reactant consumption. With the ferric (bissalen) chloride complex, the reaction was accelerated but Stages 1 and 2 did not appear (curve 340R, Figure 2). 

Careful examination of the oxygen-uptake curves with ferric acetylacetonate or ferric chloride present, failed to reveal an induction period... 

Manganous acetylacetonate Manganic acetylacetonate Ferrous acetylacetonate Ferric acetylacetonate Cobaltic acetylacetonate Rhodium chloride Nickel acetylacetonate Potassium platinous chloride Tetrammine copper (II) sulfate Potassium gold cyanide... 

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