X-ray diffraction study of polymeric Mg complexes of clodronic acid

• Published in: Solid state sciences Vol. 8; no. 9; pp. 1098 - 1102
• Main Authors: Kontturi, Mervi, Kunnas-Hiltunen, Susan, Vepsäläinen, Jouko J., Ahlgrén, Markku
• Format: Journal Article
• Language: English
• Published: Paris Elsevier Masson SAS 01-09-2006; Elsevier
• Subjects: Bisphosphonate; Clodronate; Condensed matter: structure, mechanical and thermal properties; Crystal structures; Exact sciences and technology; Magnesium; Organic compounds; Organometalloidal and organometallic compounds; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Crystal structures; Bisphosphonate; Magnesium; Clodronate; Stacking sequence; Phosphonates; XRD; Experimental study; Monoclinic lattices; Magnesium complexes; Clodronic acid; Hydrogen bonds; Orthorhombic lattices; Organo non metallic compound; Crystal structure
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2006.02.055

Two Mg complexes of (dichloromethylene)bisphosphonic acid disodium salt, [{Mg(H
2O)
6}{Mg(Cl
2CP
2O
6)(H
2O)}⋅7H
2O]
n
(
1) and [NaMg(Cl
2CP
2O
6H)(H
2O)
5]
n
(
2), were prepared and characterised by X-ray crystallography. The two compounds consist of similar one-dimensional magnesium clodronate chains; in
1, [Mg(H
2O)
6]
2+ cations are located between the chains; and in
2, coordinated Na
+ cations hold the chains together in a three-dimensional network. The packing of
1 resembles layers, with the chlorine atoms of clodronate pointing toward the interlayer section, which is filled with lattice water molecules; and a wide hydrogen network is formed in all three dimensions. The framework of
2 contains channels, surrounded by the Cl and O atoms of clodronate, and aqua ligands; the channels are occupied by water molecules.