in decalin byproducts: CO; 3.5:1 mixture of arene and Cr(CO)6 in solvent purged for 20 min with Ar, evacuated for 20 min, mixture refluxed, cooled to 20°C, cooled to -18°C under argon, reaction time 3.5 h; filtered off, dissolved in benzene, filtered through Kieselguhr, concentrated, light petroleum added, crystn. at -18°C, complexes eluted with benzene/ethyl acetate, elem. anal., NMR;

in ethanol Kinetics; byproducts: methanol; in water and carbonat-free alcohol, different concns. of ester and KOEtat 50°C; reaction was stopped at ester ratio between 0.3-3 by HCl and phosphate buffer (pH=7.00 +/-0.02);