in solid solid-state synthesis from MnCl2 (10.3 mmol) and NaCH3COCHCOCH3 (19.7 mmol) by mechanical activation (vibrating quartz vessel for 2 h at 5 Hz); transferring product into dry box under inert atmosphere;; vac. sublimation (0.1 torr) at 150-200°C bath temp.;;

in diethyl ether byproducts: (PhSi(OH)O)6; acetylacetone was added to Mn compd. in Et2O; stirred at room temp. for 24 h; filtered; washed (Et2O);

formaldehyd in methanol addn. of metal acetylacetonate into soln. of H2CO in MeOH, heating to 60°C for 20 h under N2; product is trimethylsilylated and analyzed by GC;