in hexane; toluene byproducts: CH4; in a glovebox, Nd-contg. compd. (0.40 mmol) was dissolved in hexane, anda toluene suspn. of carboxylic acid (0.40 mmol) was slowly added; stirr ing at ambient temp. for 18 h; the solvent was removed in vac.; extn. in toluene; the complex was washed with hexane and dried for several hours; purifn. by crystn.; elem. anal.;

With  hydrogen bromide; acetic acid T=120°C; 65 h;  Inert atmospheresealed;