in water 0.25 h; Heating / reflux;

nBu4NPF6 in acetylacetone Electrochem. Process; tetra-n-butylammonium hexafluorophosphate added to dry acetylacetone, Mnelectrode; evapn. under vac., residue washed twice with hexane and twice with petroleum ether;

(CH3CO)2CH2 in water dissolving of powdered KMnO4 in water by slight warming, filtration, addn. of excess of distilled acetylacetone with vigorous stirring, stirring for 5 min over a steam-bath, allowing to cool for 10 min; filtration, washing several times with acetylacetone-water, vac. drying, recrystn. (benzene then light petroleum addn.), cooling to 0°C,elem. anal.;

in not given

treating of Mn (purity 99.7percent) 4 molar HNO3 for 1h at room temp., addn. of acetylacetone in presence of N2 for 100h 27°C;

air; acetic acid T=23°C; Further byproducts given;

air; acetic acid T=23°C; 13 h; Further byproducts given;

air; acetic acid T=23°C; 13 h; Further byproducts given;

dimethyl sulfoxide in dimethyl sulfoxide Kinetics; dissolution of Mn-complex in DMSO in presence of aq. perchloric acid (1.0 M) at 30°C; monitoring spectrophotometrically at 618 nm, extn. with aq. H2SO4 and ether, drying ether soln. over Na2SO4, distn. in vacuo (139°C, 750mm);

air; acetic acid T=23°C; 12 h; Further byproducts given;