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Título

Platonic relationships in metal phosphonate chemistry: ionic metal phosphonates

AutorXanthopoulos, Konstantinos; Anagnostou, Zafeiria; Chalkiadakis, Sophocles; Choquesillo-Lazarte, Duane CSIC ORCID; Mezei, Gellert; Zaręba, Jan K.; Zoń, Jerzy; Demadis, Konstantinos D.
Palabras claveMetal phosphonate
Ionic compounds
Phosphonic acids
Organic salts
Fecha de publicación11-jun-2019
EditorMultidisciplinary Digital Publishing Institute
CitaciónCrystals 9(6): 301 (2019)
ResumenPhosphonate ligands demonstrate strong affinity for metal ions. However, there are several cases where the phosphonate is found non-coordinated to the metal ion. Such compounds could be characterized as salts, since the interactions involved are ionic and hydrogen bonding. In this paper we explore a number of such examples, using divalent metal ions (Mg2+, Ca2+, Sr2+ and Ni2+) and the phosphonic acids: p-aminobenzylphosphonic acid (H2PABPA), tetramethylenediamine-tetrakis(methylenephosphonic acid) (H8TDTMP), and 1,2-ethylenediphosphonic acid (H4EDPA). The compounds isolated and structurally characterized are [Mg(H2O)6]·[HPABPA]2·6H2O, [Ca(H2O)8]·[HPABPA]2, [Sr(H2O)8]·[HPABPA]2, [Mg(H2O)6]·[H6TDTMP], and [Ni(H2O)6]·[H2EDPA]·H2O. Also, the coordination polymer {[Ni(4,4’-bpy)(H2O)4]·[H2EDPA]·H2O}n was synthesized and characterized, which contains a bridging 4,4’-bipyridine (4,4’-bpy) ligand forming an infinite chain with the Ni2+ cations. All these compounds contain the phosphonate anion as the counterion to charge balance the cationic charge originating from the metal cation.
Descripción© The Author(s).
Versión del editorhttps://doi.org/10.3390/cryst9060301
URIhttp://hdl.handle.net/10261/185040
DOI10.3390/cryst9060301
ISSN2073-4352
E-ISSN2073-4352
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