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Inicio » Actividades I+D > Publicaciones 2003 > Two new dimeric cadmium(II) and zinc(II)...
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"Two new dimeric cadmium(II) and zinc(II) sulfate complexes with 2,4,6-tris(2-pyridyl)-1,3,5-triazine and 2,2:6′,2″-terpyridine"
M. Harvey, S. Baggio, S. Russi and R. Baggio
Acta Cryst. C 59(5) (2003) m171-m174
The structures of two new sulfate complexes are reported, namely di-μ-sulfato-κ3O,O′:O″-bis{aqua[2,4,6-tris(2-pyridyl)-1,3,5-triazine-κ3N1,N2,N6]cadmium(II)} tetrahydrate, [Cd2(SO4)2(C16H12N6)2(H2O)2]·4H2O, and di-μ-sulfato-κ2O:O′-bis[(2,2′:6′,2″-terpyridine-κ3N1,N1′,N1″)zinc(II)] dihydrate, [Cd2(SO4)2(C15H11N3)2]·2H2O, the former being the first report of a Cd(tpt) complex [tpt is 2,4,6-tris(2-pyridyl)-1,3,5-triazine]. Both compounds crystallize in the space group Pl and form centrosymmetric dimeric structures. In the cadmium complex, the metal center is heptacoordinated in the form of a pentagonal bipyramid, while in the zinc complex, the metal ion is in a fivefold environment, the coordination geometry being intermediate between square pyramidal and trigonal bipyramidal. Packing of the dimers leads to the formation of planar structures strongly linked by hydrogen bonding.
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