Penta- and heptacoordinated tin(IV) compounds derived from pyridine Schiff bases and 2-pyridine carboxylate: Synthesis and structural characterization

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

“…This suggests the increase in conjugation upon the formation of tin complexes with Schiff base ligands [5]. 13 C NMR studies 13 C NMR Spectra of the compounds were recorded in DMSO-d 6 and these spectra also support the authenticity of the proposed structures ( Table 5). The signals observed in the range 156-171 ppm were due to azomethine carbons.…”

“…The 1 H NMR spectra of the Schiff bases were determined in DMSO-d 6 . The 1 H NMR data of the two Schiff bases and their respective tin complexes are summarized in Table 4.…”

“…Schiff bases are important due to carbon nitrogen double bond (C=N) which can coordinate with metal [3]. These important compounds have been reported to possess diverse biological activities such as antifungal, analgesic, anti-inflammatory, antibacterial, antioxidant, antitumor, cardiovascular, antitubercular [4][5][6][7] and as local anesthetic [8]. Apart from these synthetic imine groups are synthesized in labs various natural products compounds.…”

Synthesis and structural characterization of dimethyltin(IV) complexes based on functionalized pyridyl ligands

“…[42] and the 119 Sn NMR chemical shift value at À473 ppm is in the range for a seven-coord inated tin compound (À440 to À540 ppm) [43][44][45]. Note that the 119 Sn NMR spectrum of a dichlorometha ne solution of SnMe 2 Cl 3 À indicates a signal at d = À125 ppm [42].…”

Synthesis and evaluation of antioxidant and antimicrobial activities of Schiff base tin (II) complexes

“…Schiff base complexes have numerous applications, such as in the treatment of cancer, as bactericide agent, as antivirus agents, as fungicide agent anti-inflammatory and antipyretic agent in the treatment of diseases such as trypanosomiasis and jaundice and as analytical reagent [2][3][4][5]. The importance of metal ion in biological system as macrocyclic compounds is well established because of their catalytic behavior in a number of redox reactions of biological significance [6].…”