Bis(dimethoxyethane-1κ2O,O′)pentakis(1,1,1,3,3,3-hexafluoropropan-2-olato)-2κ3O,3κ2O-μ-hydroxido-1:3κ2O-μ3-oxido-1:2:3κ3O-magnesiumdialuminium

Abstract

Partial hydrolysis of a sample of [Mg(dme)3][Al(hfip)4]2 crystals led to the formation of the title complex, [Mg(dme)2{HOAl(hfip)2OAl(hfip)3}] (dme = dimethoxyethane and hfipH = hexafluoroisopropanol) or [Mg(C4H10O2)2O(OH)Al2(C3HF6O)5]. The magnesium cation exhibits a distorted octahedral coordination with two bidentate dimethoxyethane molecules and a dinuclear aluminate anion, coordinated to Mg2+ via oxido and hydroxido units. The anion is an oxido-bridged species, [HOAl(hfip)2(μ-O)Al(hfip)3]2–, with one Al3+ cation tetrahedrally coordinated by an oxido (O2–) anion, a hydroxido anion, and two hfip groups, whereas the second Al3+ cation is coordinated by the oxido anion and three hfip groups.

Keywords

• fluorinated alkoxyaluminate
• hfip
• magnesium battery electrolyte
• crystal structure