Tin(IV) Complexes of Schiff Base Derived from Amino Acid: Synthesis and Characteristic Spectral Studies

Abstract

A new series of tin(IV) complexes of general formula [Sn(L-1)(Opri)2] (1), [Sn(HL-1)2(Opri)2] (2), [Sn(L-2)(Opri)2] (3), [Sn(HL-2)2(Opri)2] (4), (L is dianion of Schiff bases derived from the condensation of 2-hydroxy-1-naphthaldehyde with glycine (L-1) andLβ-alanine (L-2)) was synthesized by reaction of tin(IV) tetraisopropoxide with the ligands, in appropriate stoichiometric ratios (1 : 1 and 1 : 2). This would result in the replacement of the isopropoxide group from the tin(IV) tetraisopropoxide and hydrogen(s) from ligand with the azeotropical removal of isopropanol. An attempt has been made to prove the structure of the resulting complexes on the basis of elemental analysis, IR,1H nuclear magnetic resonance. The binding site of the ligand was identified by IR spectroscopic measurement. In these complexes, the tin(IV) centre is bonded to oxygen atom of the hydroxyl or carboxylate group. The spectra data suggest that the carboxylate group is coordinated to tin(IV) centre in monodentate manner.

Synthesis of Schiff bases derived from 2-hydroxy-1- naphth- aldehyde and their tin(II) complexes for antimicribial and antioxidant activities

“…The signals shifted downfield in the spectra of the complexes indicating the coordination of oxygen of the -OH group with tin metal. In the case of complex [Sn(HNSM)Cl 2 (H 2 O) 2 ] the -OH signal disappeared indicating the deprotonation of oxygen atoms of the ligand on complexation [25]. The multiplets between 6.8-8.6 ppm in the spectra of ligands and their respective tin(II) complexes are assigned to the naphthylidene group protons and other aromatic protons.…”

New di‐ and triorganotin(IV) carboxylates derived from a Schiff base: synthesis, characterization and in vitro antimicrobial activities

“…Schiff bases are an important class of ligands in coordination chemistry and have important and vast biologic applications in various fields . Recent publications on the chemistry of organotin(IV) complexes containing Schiff base ligands have highlighted their antitumor, antimicrobial, antileishmanial, anti‐insecticidal and anti‐inflammatory activities.…”

Synthesis, Characterization, Spectral Studies, Antibacterial Evaluation, Thermodynamics and DFT Calculations of Dimethyltin(IV) Dichloride Schiff Base

“…1,2 This compounds with strong donor atom are excellent in catalysis and biological replication due to their strong coordination abilities with metal ions. 3 There are several reports on metal complexes such as Ni(II), Cu(II), Co(II) and Sn(IV) of the Schiff base ligands that have a variety of applications including biochemical reactions and biological regulators, 4,5 clinical, 6,7 analytical 8,9 and industrial uses in addition to their important roles in enhancing the solubility and stability of homogeneous or heterogeneous catalysts. [10][11][12] Over the years, much effort has done on coordination of Schiff bases to organotin(IV) compounds.…”