Luminescent organotin complexes with the ligand benzil bis(benzoylhydrazone)

Antimicrobial activity of organotin(IV) complexes with the ligand benzil bis(benzoylhydrazone) and 4,4′-bipyridyl as coligand

“…Selected spectroscopic data: 1 [SnMe 2 L] 1. The complex was synthesised following the procedure previously reported [43]. Selected spectroscopic data: 1 [SnMe 2 L(bipy)] 3.…”

“…Complexes 1 and 6 were obtained as described previously [43]. The complexes containing 4,4′-bipyridyl were synthesised by mixing the stoichiometric amounts of the ligand and bipy in the presence of Et 3 N and adding the corresponding organotin(IV) chloride, except complex [(SnMe 2 L) 2 (bipy)] 2, which can be exclusively synthesised by treating [SnMe 2 L] 1 with an excess of 4,4′-bipy.…”

“…The crystal structures of complexes 1 and 6 have been previously described [43]. Both are isoestructural and a picture of complex 1 is shown in Fig.…”

“…In order to find new pharmacologically active molecules, here we continue with the systematic study of the coordinating behaviour of the ligand benzil bis(benzoylhydrazone), which was previously reacted with divalent metals to yield from monomers to trinuclear helicates [42] and with some SnR 2 Cl 2 [43]. In general, the biological activity of organotin compounds is greatly influenced by the structure of the molecule and conceivably by the nuclearity of the complexes [44,45].…”

Attachment of Chelating Ligand Pockets to Tinorganyl Moieties

“…There are two common modes for installing chelating ligands at tinorganyl moieties: A reaction of free ligands with the tin moiety,1e,1f,3 or the pre‐connection of the ligand with the tin atoms by a Sn–C bond away from the chelating unit. In this case, the chelating ligand may then coordinate to the tin atom,1e,4 or, keep away from the tin atom to produce a vacant chelating pocket to the tin atom, which bears the additional opportunity to trap further metal atoms (Scheme ) 4a,5…”