Monodentate and bridging behaviour of the sulfur-containing ligand 40-[4-(methylsulfanyl)phenyl]-4,20:60,400- terpyridine in two discrete zinc(II) complexes with acetylacetonate

Abstract

The Zn complexes bis(acetylacetonato-2 O,O0 )bis{40 -[4-(methylsulfanyl)phenyl]-4,20 :60 ,400-terpyridine-N1 }zinc(II), [Zn(C5H7- O2)2(C22H17N3S)2], (I), and {-40 -[4-(methylsulfanyl)phenyl]- 4,20 :60 ,400-terpyridine-2 N1 :N100}bis[bis(acetylacetonato-2 O,O0 )- zinc(II)], [Zn2(C5H7O2)4(C22H17N3S)], (II), are discrete entities with different nuclearities. Compound (I) consists of two centrosymmetrically related monodentate 40 -[4-(methylsulfanyl)phenyl]-4,20 :60 ,400-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. Intraand intermolecular interactions are weak, mainly of the C— H and – 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.