Triorganostannyl(IV) benzoates with pendulous framework appended with ferrocene scaffold

Publication date: Available online 17 December 2018Source: Journal of Organometallic ChemistryAuthor(s): Tushar S. Basu Baul, Dhrubajyoti Dutta, Bruno G.M. Rocha, M.Fátima C. Guedes da Silva, Antonin LyčkaAbstractA series of four new long chain triorganotin(IV) esters containing a diazenyl- and an imino-groups appended with ferrocene scaffold were designed and synthesized. Ferrocene based metallo pro-ligands H'HFcL1 and H'HFcL2 were obtained by reacting isomeric 3-/4-ferrocenylanilines with 2-[(E)-2-(3-formyl-4-hydroxyphenyl)-1-diazenyl]benzoic acid, which upon reactions with appropriate triorganotin(IV) precursors yielded compounds namely, [nBu3Sn(HFcL1)] 1, [Ph3Sn(HFcL1) 2, [nBu3Sn(HFcL2)] 3 and [Ph3Sn(HFcL2) 4. Compounds 1–4 have been characterized by elemental analysis and their spectroscopic properties were investigated using IR, UV–Vis and NMR spectroscopic techniques. The molecular structures of H'HFcL1 and two representative heterobimetallic compounds 3 and 4 have been determined by X-ray crystallography. Compound 3 is a 1D polymer and 4 is a discrete molecule; their structural differences relative to those of H'HFcL1 clearly indicate the influence of the binding of the tin cluster. The redox properties of the metallo pro-ligands and their compounds were also investigated by cyclic voltammetry.Graphical abstractThe binding of the tin clusters to the ferrocene scaffolds have an influence on the Cps ring slippages, planarity of HFcLn, twisting of the carboxylate a...

Source: Journal of Organometallic Chemistry - December 17, 2018 Category: Chemistry Source Type: research