Abstract:Information concerning the structures of compounds of rare earth elements with carboxylic acids and a β-diketone containing stable organometallic moieties that we obtained previously is presented. Additional results for 15 complexes with the [Gd 2 O 2 ] core allowed confirming and improving the correlation between J Gd-Gd and the Gd. . . Gd distance for complexes of this type that we found earlier.