Three yttrium crotonate complexes with diimines
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The synthesis and crystal structures of three new yttrium crotonate (crot) compounds, associated with three different nitrogenous bases, namely 1,10-phenanthroline ( phen), 4-methyl-1,10-phenanthroline (mphen) and 2,2'-bipyridylamine (bpa), are presented. All three compounds organize as centrosymmetric dimers, to give tetra-mu-crotonatobis[ crotonato(1,10-phenanthroline) yttrium(III)] dihydrate, [Y-2(C4H5O2)(6)(C12H8N2)(2)] . 2H(2)O or [Y(crot)(3)(phen)](2) . 2H(2)O, (I), tetra-mu-crotonato-bis[crotonato(4-methyl-1,10-phenanthroline) yttrium(III)] dihydrate, [Y-2(C4H5O2)(6)(C13H10N2)(2)] .-2H(2)O or [Y(crot)(3)(mphen)](2) . 2H(2)O, (II), and tetra-mu-crotonatobis[ diaqua( crotonato) yttrium(III)] 2,2'-bipyridylamine tetrasolvate, [Y-2(C4H5O2)(6)(H2O)(4)] . 4C(10)H(9)N(3) or [Y(crot)(3)( aq)(2)](2) . 4(bpa), (III). Complexes (I) and (II) are isomorphous, with the bases acting as chelating ligands. In complex (III), the coordination sphere is built up of carboxylate and aqua ligands, with the non-coordinated diimine acting as included solvent.