Polyol metal complexes .17. Crystalline iron(III) complexes with twofold deprotonated anhydroerythritol ligands

Three new crystalline ferrates(III) with diolato ligands derived from anhydroerythritol by deprotonation have been synthesized from wet alcoholic and from aqueous solution. Almost colorless, monoclinic crystals of Na-2[Fe(AnErytH(-2))(2)(OH)]. 0.5 NaNO3 . 3.5 H2O (1) have been prepared from ethanolic solutions. They content mononuclear bis diolato hydroxo ferrate(III) dianions. Trinuclear hexakis diolato mu(3)-methoxo triferrat(III) tetraanionic constitute the anionic part of Na-4[Fe-3(AnErytH(-2))(6)(OMe)]. 2.5 NaNO3 (2), yellow-green hexagonal crystals of which are formed from wet methanolic solutions. Yellow-green triclinic crystals of Ba-2[Fe-2(AnEryth(-2))(4)(mu-OH)(2)]. 12 H2O (3) have been precipitated from aqueous solutions. In 3, the anions of 1 are dimerized to give tetrakis diolato di-mu-hydroxo diferrant(III) tetraanions.