in ethanol prepn. by refluxing ZnO with excess of carboxylic acid in EtOH for about2 h; cooled; ppt. filtered off; washed (EtOH) repeatedly; collected; kept over silica gel in vac. desiccator; elem. anal.;

in water metathesis of potassium caprylate with zinc acetate at 50-55 °C; the ppt. was digested, filtered and washed with hot dest. water, then with acetone, dried first in an air oven at 60-65 °C, then in vac. and recrystn. twice from benzene, dried again in vac. for 48 h; elem. anal.;;

in water aq. soln. of Na-octanoate was added to weakly acidic Zn-nitrate soln. (pH=5.5); ppt. was washed with distd. water, dried, recrystd. from ethanol at roomtemp.;

in neat (no solvent) excess carboxylic acid or excess ZnO, repeated vibration milling; not isolated, detd. by IR spectroscopy;

in methanol; water prepn. by adding satd. aq. soln. of metal nitrate to soln. of potassium caprylate in MeOH; crystd. several times from hot toluene; dried at 50°C for 1 d;

in acetone reflux 2 h;

in acetone reflux 2 h;