Synthesis and Structural Characterization of Some Potassium Complexes of Some Bis(phenolate) Ligands and Some Novel Heterobimetallic Binuclear Arrays Formed with Trivalent Lanthanoid Ions

The structural characterizations of the potassium complexes of a pair of dianionic bis(phenolate) ligands, {L-R = [-OC6H2(2,4-Bu-t)(6-CH2)](2)NCH2CH2R} R = NMe2, OMe, crystallized from 1,2,-dimethoxyethane (DME) are recorded, showing them to take the binuclear form [K2LR(DME)(3)]. A pair of neutral binuclear heterobimetallic isotypic complexes are defined with ytterbium(III), with phenol, as sodium salts, of the form [Yb(L-R)(OPh)(2)Na(DME)(HOPh)], and a further array with samarium(III), of the (partially protonated) form [Sm(L-OMe)(2)-Na(OH2)]. A further complex, [Na(DME)(3)][Yb(*L-py)(2)], results from an unusual ligand reduction by an ytterbium(II) species to give a new dianionic Schiff base ligand which is coordinated to ytterbium(III) {*L-py = -OC6H2(2,4-Bu-t)(6-CH=N-CH-2-C6H4N)}.