Strontium diibuprofenate dihydrate, strontium malonate sesquihydrate, strontium diascorbate dihydrate and strontium 2-oxidobenzoate hydrate at 120 K

Abstract

Four strontium(II) salts with organic acids have been studied. Poly[diaquadi-μ-ibuprofenato-strontium(II)] or poly­[diaqua­bis[μ-2-(4-isobutyl­phen­yl)­propionato]­strontium(II)], [Sr(C13H17O2)2(H2O)2]n, crystallizes with eight-coordinated Sr atoms. The coordination polyhedra are inter­connected by edge-sharing to form chains. The Sr coordination chains are packed into layers, which are stacked by van der Waals inter­actions. Poly[μ-aqua-diaquadi-μ-malonato-distrontium(II)], [Sr2(C3H2O4)2(H2O)3]n, crystallizes with nine-coordinated Sr atoms three-dimensionally inter­connected into a framework structure. One of the two crystallographically independent water mol­ecules is located on a twofold axial site. catena-Poly[[diaqua­(ascorbato)strontium(II)]-μ-ascorbato], [Sr(C6H7O6)2(H2O)2]n, crystallizes with isolated eight-coordinated Sr polyhedra. One of the ascorbate ligands bridges two Sr atoms, forming zigzag polyhedral ascorbate chains. These chains are tied together by a three-dimensional hydrogen-bonding network. Poly[aqua-μ-2-oxidobenzoato-strontium(II)], [Sr(C7H4O3)(H2O)]n, crystallizes with eight-coordinated Sr atoms. The polyhedra are inter­connected by face- and edge-sharing into layers. These layers are stacked by van der Waals forces between the protruding 2-oxidobenzoate ligands.