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artículo con referato
"Monodentate and bridging behaviour of the sulfur-containing ligand 4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4″-terpyridine in two discrete zinc(II) complexes with acetylacetonate"
J. Granifo, R. Gavino, E. Freire and R. Baggio
Acta Cryst. C 68(10) (2012) m269-m274
The Zn complexes bis(acetylacetonato-κ2O,O′)bis{4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4″-terpyridine-κN1}zinc(II), [Zn(C5H7O2)2(C22H17N3S)2], (I), and {μ-4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4″-terpyridine-κ2N1:N1″}bis[bis(acetylacetonato-κ2O,O′)zinc(II)], [Zn2(C5H7O2)4(C22H17N3S)], (II), are discrete entities with different nuclearities. Compound (I) consists of two centrosymmetrically related monodentate 4′-[4-(methylsulfanyl)phenyl]-4,2′:6′,4″-terpyridine (L1) ligands binding to one ZnII atom sitting on an inversion centre and two centrosymmetrically related chelating acetylacetonate (acac) groups which bind via carbonyl O-atom donors, giving an N2O4 octahedral environment for ZnII. Compound (II), however, consists of a bis-monodentate L1 ligand bridging two ZnII atoms from two different Zn(acac)2 fragments. Intra- and intermolecular interactions are weak, mainly of the C–Hπ and ππ types, mediating similar layered structures. In contrast to related structures in the literature, sulfur-mediated nonbonding interactions in (II) do not seem to have any significant influence on the supramolecular structure.
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