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Inicio » Actividades I+D > Publicaciones 2011 > Bis[(dihydrogen pyrophosphato-κ2O,O′)(2,...
artículo con referato
"Bis[(dihydrogen pyrophosphato-κ2O,O′)(2,2′:6′,2″-terpyridine-κ3N,N′,N″)copper(II)] 4.5-hydrate"
M. Perec and R. Baggio
Acta Cryst. C 67(5) (2011) m140-m144
The title copper complex, [Cu(H2P2O7)(C15H11N3)]2·4.5H2O, consists of two very similar independent Cu(Tpy)H2P2O7 monomeric units (Tpy is 2,2′:6′,2″-terpyridine) plus four and a half water molecules of hydration, some of which are disordered. Tpy units bind through the usual triple bite via their N atoms, and the H2P2O72- anions coordinate through two O atoms from two different phosphate units. Each independent CuN3O2 chromophore can be described as a slightly deformed square pyramid, with one of them having a sixth, semicoordinated, O atom from a centrosymmetrically related CuN3O2 unit in a weakly bound second apical position suggesting an octahedral environment for the cation and weak dimerization of the molecule. The two independent complex molecules are connected via two strong O–HO interactions between the phosphate groups to form hydrogen-bonded dinuclear units, further linked into [111] columns, resulting in a very complex three-dimensional supramolecular structure through a variety of classical and nonclassical hydrogen bonds, as well as ππ interactions.
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