in methanol heating soln. of (Cr(NH3)6)Br3 in methanol with excess of 2-hydroxy-acetophenone;;

in water heating aq. soln. of Cr(CH3CO2)3 and 2-hydroxy-acetophenone for 10 h under reflux to 140 °C, extg. react.-soln. with CHCl3, pptg. with abs. ether after processing the org. phase;; pptn.;