Organotin Carboxylates Research Articles

Heteroleptic tri- and di- Organotin(IV) Carboxylates: Synthesis, Characterization and Anticancer Evaluation

Heteroleptic tri- and di- Organotin(IV) Carboxylates: Synthesis, Characterization and Anticancer Evaluation

Syntheses, crystal structures, and anticancer activities of organotin carboxylates based on Alrestatin

Syntheses, crystal structures, and anticancer activities of organotin carboxylates based on Alrestatin

Investigation of pivalic acid-derived organotin(IV) carboxylates: Synthesis, structural insights, interaction with biomolecules, and computational studies

Herein, six homoleptic and heteroleptic tri-organotin(IV) complexes (1–6) of pivalic acid (HL) were synthesized using 2,2′-bipyridine (bipy) and organotin(IV) chlorides, with a general formula of R3SnL/R3SnLbipy, where R = CH3, C4H9, and C6H5. The structure of the complexes was established in the solid phase via FT-IR spectroscopy and in solution through multinuclear NMR spectroscopy. The variety of coordination modes was implemented by the carboxylate group of pivalic acid, which is reflected in the FT-IR data and also supported by the single crystal XRD analysis for complex 5. The single crystal data revealed the presence of a five-coordinated distorted trigonal bipyramidal geometry for complex 5. The structural and electronic details of the complexes were also evaluated by the application of density functional theory through the Lanl2DZ basis set. The ability of complexes to inhibit the AChE and BChE was assessed in vitro as well as theoretically through molecular docking studies and the results were promising. The complexes 4 and 5 showed high inhibitory potency and could be a potential drug candidate. The DNA binding mode of the complexes was studied using UV–Vis spectroscopy and cyclic voltammetry. The findings revealed that these complexes readily intercalate into DNA via a spontaneous process. Additionally, an effective binding of the complexes with surfactant cetyl trimethyl ammonium bromide (CTAB) through a spontaneous process also proved them valuable in pharmacology.

Anticancer behavior of cyclometallated iridium(III)-tributyltin(IV) carboxylate schiff base complexes with aggregation-induced emission

Cyclometallated iridium(III) and organotin(IV) carboxylate complexes have shown potential application value in the field of anticancer. However, the widespread aggregation-caused quenching (ACQ) effect of these complexes is not conducive to the exploration of their targeting and anticancer mechanism, and the idea of aggregation-induced emission (AIE) effect can effectively solve this problem. Then, AIE-activated cyclometallated iridium(III)-tributyltin(IV) carboxylate Schiff base complexes were designed and prepared in this study. Complexes exhibited AIE effect in highly concentrated solution or aggregative state, which facilitated the investigation of subcellular tissue targeting (mitochondria) and cell morphology. Compared with cyclometallated iridium(III) complex and tributyltin(IV) carboxylate monomers, these complexes showed the better in-vitro anti-proliferative activity toward A549 cells, confirming the favorable synergistic anticancer activity. Even for A549/DDP (cisplatin-resistance) cells, these complexes also exhibited the better activity. In addition, complexes showed a mitochondrial apoptotic pathway. Therefore, cyclometallated iridium(III)-tributyltin(IV) carboxylate Schiff base complexes can be used as the potential substitutes for platinum-based drugs and gain further application.

Molecular structure regulation and herbicidal activity of dibutyltin aryloxyacetate complexes

Six dibutyltin aryloxyacetate complexes [(X-C6H4OCH2COO)(SnBu2)2(μ3O)(OMe)]2 (A1, B1), [(X-C6H4OCH2COO)2(SnBu2)2(μ3O)]2 (A2, B2), and [(X-C6H4OCH2COO)2SnBu2] (A3, B3) were synthesized and characterized by IR, NMR, HRMS, and TGA techniques. The molecular structure of complexes A1, A3 and B1-B3 was confirmed by single-crystal X-ray crystallography. Complexes A1, B1, A2, and B2 are dimeric carboxylate tetraorganodistannoxanes, displaying a "ladder-like" molecular arrangement. The aryloxyacetate ligands in A1 and B1 adopt a monodentate mode, while they function as bridging coordination ligands in A2 and B2. Complexes A3 and B3 represent dibutyltin carboxylates with crystallographically imposed two-fold symmetry, with the aryloxyacetate ligands adopting a bidentate mode. Aryloxyacetic acids demonstrate a propensity for assuming various coordination modes, leading to the formation of diverse molecular architectures in organotin carboxylates. In addition, complex B1 exhibits polymorphism. Echinochloa crus-galli and Portulaca oleracea L. were used as target organisms for herbicidal activity testing using a petri dish method. It was found that they have a significant inhibitory effect on weed roots and stems at 200 μmol/L, and the structure-activity relationship analysis revealed the important influence of substituent types and complex structures on their activity.

Sustainable biodiesel production via castor oil transesterification using organotin(IV) compounds as catalysts

The rapid reduction in fossil fuel reserves and their environmental effects has caused a serious threat to humanity. Meanwhile, the exponential increase in the usage of fossil fuels demands the exploration of new energy sources. Therefore, this work was designed keeping in view the today need of the World for renewable energy source. The 4-(4-chloro-2-fluorophenylamino)-4-oxobut-2-enoic acid based organotin(IV) carboxylates were prepared and characterized by FT-IR, NMR and single crystal XRD analysis. Due to the Lewis acid character of Sn(IV) centre confirmed by DFT computational study, the synthesized compounds were used as catalysts for the transesterification of castor oil for biodiesel production. Under the optimized experimental conditions, the catalytic performance of the tested compounds was found as follow: 1 > 3 > 2 > 4 > 6 > 5 > 7. The obtained biodiesel was confirmed by FT-IR, NMR and GC–MS. The fuel properties of the obtained biodiesel were also determined and compared with American Standard (ASTM D-6751). Based on their catalytic performance, these compounds might be the potential future candidates for the expansion of catalyst systems for efficient biodiesel production from the various feedstocks.

Synthesis and anti-tumor activities of three newly designed organotin(IV) carboxylates complexes

Three distinctive end group-containing organotin (IV) carboxylates complexes (YDCOOSn, CLCOOSn and BZCOOSn) were designed and synthesized. Together with theoretical calculations, a thorough examination was carried out to investigate the photophysical properties of these compounds. The cytotoxicity of the synthesized compounds was tested using normal cell line GES-1 and was assessed against four cancer cell lines (A549, Hela, H1299 and HepG2). The outcomes of the experiments demonstrated that these complexes had superior selectivity than cisplatin towards cancerous cells, particularly in the A549 cell line. BZCOOSn was selected as a candidate compound for additional research because it exhibited the lowest IC50 value and the most impressive inducing effect on cell death and G2/M phase arrest. Increased caspase-3 and -9 enzyme activity, a decline in mitochondrial membrane potential (MMP), characteristic nuclear apoptotic morphology, and an accumulation of intracellular reactive oxygen species (ROS) were seen in A549 exposed to BZCOOSn. These findings demonstrated that BZCOOSn exhibited strong cytotoxicity by triggering cell death in A549 via the mitochondrial route. Furthermore, using the scratch wound healing assay, it was discovered that BZCOOSn reduced the migration of A549 cancerous cells. These data all pointed to BZCOOSn as a possible candidate for more research and development as a chemotherapeutic drug.

Imine-functionalized organotin(IV) carboxylates: Syntheses, structures and antibacterial activities

Six new imine-functionalized organotin(IV) carboxylates viz. {[(n-Bu)2Sn(L1)]2O]}2 (1), [(t-Bu)2Sn(L1)2] (2), [Ph3Sn(L1)] (3), [(t-Bu)4Sn2(OH)2(L2)2] (4), [Ph3Sn(L2)] (5) and [(t-Bu)2Sn(L3)2] (6) have been synthesized and characterized by FT-IR spectroscopy, elemental analysis, 1H, 13C{1H} and 119Sn{1H} NMR spectroscopy. The solid-state molecular structures of all compounds have been elucidated by single-crystal X-ray diffraction analyses. Compound 1 shows a ladder-type structure consisting of four tin atoms. Compounds 2–3 and 5–6 are mononuclear and contain only one tin atom in each compound. Interestingly, compound 4 exhibits a hydroxide-bridged dinuclear structure. All compounds were evaluated for their antibacterial activities against E. coli XL-1 Blue cells, and compound 1 showed maximum activity amongst all compounds.

Design, physicochemical confirmation, single crystal structures as well as exploration of antibacterial and anticancer potential of organotin(IV) carboxylates

In this article, we are reporting a series of di-and tri-organotin(IV) carboxylate complexes (1–4) derived from the reaction of sodium-3-bromophenylacetate (NaL) with (CH3)2SnCl2, (C4H9)2SnCl2, (CH3)3SnCl and (C4H9)3SnCl in dried toluene while refluxing for 8 h. The desired organotin(IV) derivative were analyzed by elemental analyzer, FTIR, NMR and single crystal XRD. The antimicrobial data against the tested bacterial strains follow the order: 2 > 4 > 3 > 1 > HL. The anticancer potential of the synthesized compounds was evaluated against the lung cancer cell line (A549) and normal lung fibroblast cell line (MRC-5) and it was observed that 4 was the highly cytotoxic against A549 while HL and 1 showed no cytotoxicity against MRC-5, neither at lower or higher concentrations.

Synthesis, spectroscopic characterization, antileishmanial, DNA binding, antioxidant, cytotoxicity, antifungal and antibacterial studies of organotin(IV) carboxylate complexes

Six new organotin(IV) complexes, [Bu2SnL] (1), [Me2SnL] (2), [Me3SnL] (3), [Bu3SnL] (4), [Ph3SnL] (5) and [(n-Oct2SnL] (6) have been synthesized from the reaction of 4-((5-chloro-2-hydroxyphenyl)ethylideneamino)methyl)cyclohexanecarboxylic acid (HL) with the corresponding diorganotin(IV) dichloride/oxide or triorganotin(IV) chloride.All the synthesized compounds were structurally characterized by elemental analysis, FT-IR, multinuclear NMR (1H and 13C) spectroscopies and powder X-ray diffraction analysis. The results of spectroscopic studies support coordination of oxygen donor site of the ligand with the tin atom of di andtriorgnaotin(IV) moieties. Currently, a vaccine for leishmaniasis remains unavailable, and the existing antimonial-based drugs are accompanied by significant and adverse side effects. The synthesized compounds were screened for antileishmanial activity against promastigotes form of leishmania tropica. Highest activity was shown by compound 2 with an IC50 value of 1.17 ± 0.01 µg/mL, as compared to amphotericin B with IC50 value of 0.71 ± 0.01 µg/mL The synthesized compounds were also subjected to interaction studies with single-stranded DNA (SS-DNA). Among these compounds, Compound 2 demonstrated the most substantial binding affinity, exhibiting a binding constant of 2.7x103 M−1. Furthermore, the compounds also showed excellent antioxidant potential with percentage radical scavenging value in the range of 87–95% and IC50 46.92, 72.10, 46.33 Μg/mL for compounds 1, 5 and 6respectively. The complexes revealed significant toxicity with comparable LD50(6.26 μg/mL), (6.79 μg/mL), (5.67 μg/mL)and (5.80 μg/mL)for complex 2, 3,5 and standard drug respectively. Similarly, the complexes also showed significance antifungal and antibacterial activity.

Exploring the biological activity of organotin carboxylate complexes with 4-sulfosalicylic acid

ABSTRACT. 4-Sulfosalicylic acid (SSA) was used as a ligand to prepare new triphenyltin and dimethyl-tin complexes by condensation with the corresponding organotin chloride salts. The complexes were identified by different techniques, such as infrared spectra (tin and proton), magnetic resonance, and elemental analyses. The 119Sn-NMR was studied to determine the prepared complexes' geometrical shape. Two methods examined the antioxidant activity of (SSA) and prepared complexes; Free radical scavenging activity (DPPH) and CUPRRAC methods. Tri and di-tin complexes gave high percentage inhibition than ligands with both methods due to tin moiety; the triphenyltin carboxylate complex was the best compared with the others. Also, antibacterial activity was assessed by using the agar ditch method against (Escherichia coli) and (Staphylococcus aureus) bacteria. The complexes gave high activity in inhibition than the ligand derived. Also Triphenyltin carboxylate complex showed higher antibacterial activity than the dimethyltin complex against two types of bacteria (Escherichia coli) and (Staphylococcus aureus).
 KEY WORDS: Antioxidant activity, Antibacterial activity, Sulfosalicylic acid, Tri phenyl tin chloride, Escherichia coli, Staphylococcus aureus bacteria
 Bull. Chem. Soc. Ethiop. 2023, 37(6), 1435-1442. DOI: https://dx.doi.org/10.4314/bcse.v37i6.11

Comparative Bioactivity Study of some Organotin (IV) 2-Chlorobenzoate compounds as Disinfectant agent

This research was carried out to study the bioactivitytest as disinfectant of two derivatives of organotin(IV) carboxylate compounds; diphenyltin(IV) di-2-chlorobenzoate (DPT2-CBz) (2) and triphenyltin(IV) 2-chlorobenzoate (TPT2-CBz) (4), against two pathogenic bacteria. Compounds 2 and 3 were successfully prepared by reactingdiphenyltin(IV) oxide (DPTO) (1) and triphenyltin(IV) hydroxide (TPTOH) (3) with 2-chlorobenzoic acid(2-HCBz)with yieldsof 87.71% and 88.73%, respectively. The characterization of the synthesized compounds was performed with several spectroscopy techniques such as UV, IR, 1HNMR, 13CNMR, and microelemental analyzer. The optical density (OD) test for both compounds measured using UV-Vis at 600 nm showeda goodbioactivity against two bacteria, Gram-negative Salmonella sp. and Gram-positive Staphylococcus aureus. The data revealed that compound 4 has bigger bioactivity than compound 2 and the positive control ofcommercial disinfectant (2.5% pine oil). The bioactivity of compound 4was optimum at concentration of 5x10-4 M and contact timeof 15 minutes.These data corresponding to the decrease of absorbance from 0.6640 to 0.0955 for Salmonella sp., and 0.6565 to 0.1295 for S. aureus, whereas although compound 2reached the optimum activityat the same concentration and contact time with compound 4, but the decrease of absorbance was less namely 0.6640 to 0.1305 for Salmonella sp., and 0.6565 to 0.196 for S. aureus. The decrease of absorbance in the measurement of OD implies that both compounds are potential to be used as disinfectant agent.

Synthesis, characterization and in vitro activity study of some organotin(IV) carboxylates against leukemia cancer cell, L-1210

Abstract This paper presents successful resynthesizing of several dibutyl-, diphenyl-, and triphenyltin(IV) carboxylate compounds, and their activity against leukemia cancer cell, L-1210. The compounds were synthesized by reacting the dibutyltin(IV) oxide (DBTO) (1), diphenyltin(IV) oxide (DPTO) (3), and triphenyltin(IV) hydroxide (TPTOH) (5) with 3-hydroxybenzoic acid (3-HHBz). Prior to cancer activity tests, the compounds were characterized by UV–Vis, FT-IR, NMR (both 1H NMR and 13C NMR), and microanalysis to determine elemental composition of the samples. The anticancer tests revealed that triphenyltin(IV) 3-hydroxybenzoate (TPTHBz) (6) displayed significantly higher activity than those exhibited by dibutyltin(IV) di(3-hydroxybenzoate) (DBTHBz) (2) and diphenyltin(IV) di(3-hydroxybenzoate) (DPTHBz) (4).

Triphenyltin(IV) Carboxylates with Exceptionally High Cytotoxicity against Different Breast Cancer Cell Lines.

Organotin(IV) carboxylates are a class of compounds explored as alternatives to platinum-containing chemotherapeutics due to propitious in vitro and in vivo results, and distinct mechanisms of action. In this study, triphenyltin(IV) derivatives of non-steroidal anti-inflammatory drugs (indomethacin (HIND) and flurbiprofen (HFBP)) are synthesized and characterized, namely [Ph3Sn(IND)] and [Ph3Sn(FBP)]. The crystal structure of [Ph3Sn(IND)] reveals penta-coordination of the central tin atom with almost perfect trigonal bipyramidal geometry with phenyl groups in the equatorial positions and two axially located oxygen atoms belonging to two distinct carboxylato (IND) ligands leading to formation of a coordination polymer with bridging carboxylato ligands. Employing MTT and CV probes, the antiproliferative effects of both organotin(IV) complexes, indomethacin, and flurbiprofen were evaluated on different breast carcinoma cells (BT-474, MDA-MB-468, MCF-7 and HCC1937). [Ph3Sn(IND)] and [Ph3Sn(FBP)], unlike the inactive ligand precursors, were found extremely active towards all examined cell lines, demonstrating IC50 concentrations in the range of 0.076-0.200 µM. Flow cytometry was employed to examine the mode of action showing that neither apoptotic nor autophagic mechanisms were triggered within the first 48 h of treatment. However, both tin(IV) complexes inhibited cell proliferation potentially related to the dramatic reduction in NO production, resulting from downregulation of nitric oxide synthase (iNOS) enzyme expression.

Synthesis, Characterization, and Comparison of Disinfectant Bioactivity Test of Two Triphenyltin(IV) Compounds

This paper aims to report the synthesis of two new organotin(IV) carboxylate derivatives, triphenyltin(IV) 4-aminobenzoate (2) and triphenyltin(IV) 4-nitrobenzoate (3) and to examine their antibacterial activity as a disinfectant. These compounds were prepared by reacting triphenyltin(IV) hydroxide (1) with 4-aminobenzoic acid and 4-nitrobenzoic acid, respectively. Compound (2) was obtained as a yellow solid with a yield of 84.09% and compound (3) in the form of a white solid with a yield of 80.70%. These compounds were well characterized using UV-Vis spectrometry, FT-IR spectrometry and NMR spectroscopy. The bioactivity test as a disinfectant was tested against Salmonella typhosa and Staphylococcus aureus. The activity test was carried out by measuring the optical density (OD) of the tested compounds with concentration variations of 5x10-3, 1x10-3, and 5x10-4 M in methanol and 5% dimethyl sulfoxide (DMSO), commercial Wipol (2.5% pine oil) was used as a positive control with observations monitored at contact times of 0, 5, 10, and 15 minutes. The results showed that of both compounds were active against the two bacteria compared to the positive control with compound 3 found to be more active than compound 2.

Dibutylstannanediyl (2Z,2′Z)-bis(4-(benzylamino)-4-oxobut-2-enoate inhibits prostate cancer progression by activating p38 MAPK/PPARα/SMAD4 signaling

Organotin (IV) compounds are a focus of research for potential use in cancer chemotherapy. Here, we established anticancer profile of dibutyltin (IV) carboxylate derivatives in prostate cancer (PCa) model. We determined cytotoxicity of a library of dibutyltin (IV) carboxylate derivatives and observed that dibutylstannanediyl (2Z,2′Z)-bis(4-(benzylamino)-4-oxobut-2-enoate (Ch-620; 10 μM) was minimally toxic to normal fibroblasts. Ch-620 (1–1.25 μM) inhibited proliferation of PCa and melanoma cells on short- and long-term exposures with induction of cell cycle arrest. Ch-620 treatment increased population of apoptotic cells, as assessed by flow cytometry, and activated caspase 3. Proteomics showed activation of PPARα, with repression of SMAD4 and integrin β5 (ITGB5) in Ch-620-treated PCa cells. Further analysis demonstrated that Ch-620 resulted in phosphorylation of p38 MAPK, upregulation of PPARα and decreased expression of SMAD4 and ITGB5 with reduced migration of PCa cells. In vivo studies in PC3M grafted athymic nude mice showed that Ch-620 (5 μg/week; 7 weeks) treatment reduced tumor growth as opposed to untreated controls. Immunoblot analysis of tumors demonstrated upregulated p-p38 MAPK and PPARα, followed by a decline in SMAD4 and ITGB5. Immunohistochemistry reinforced these results with increased caspase 3 and p-p38 MAPK and diminished Ki67 staining in Ch-620 treated animals. Taken together, our data indicate that Ch-620 inhibited proliferation of PCa through modulation of MAPK/PPARα/SMAD4 signaling. Organotin (IV) carboxylate compounds; specifically Ch-620 can be a potential anticancer agent for the treatment of PCa subject to detailed pre-clinical and clinical investigations. This unlocks prospects for the development of new tin-based drugs in cancer therapeutics.

Synthesis, Characterization, Biological Activity and Molecular Docking Studies of Novel Organotin(IV) Carboxylates.

Four new carboxylates complexes with general formula R2SnL2 and R3SnL, where R = n-butyl (1, 3), methyl (2, 4) and L = 4-Chlorophenoxyacetate, were synthesized in significant yields. FT-IR analysis revealed a chelating (1 and 2) and a bridging bidentate (3 and 4) coordination modes for the carboxylate ligand in solid state which was further confirmed by the single crystal X-ray analysis of complex 4. The NMR data (1H, 13C and 119Sn) revealed a higher coordination number around the tin center in R2SnL2 (1 and 2) compared to R3SnL (3 and 4). A close matching was observed between the experimental and calculated structures (obtained at B3LYP/6-31G* + LANL2DZ basis set). Quantum chemical analysis indicates that the carboxylate moiety has the major contribution in the formation of filled and unfilled orbitals as well as in ligand to ligand intramolecular charge transfer during the electronic transitions. The cytotoxicity data of the screened compounds evaluated against lung cancer cell line (A549) and normal lung fibroblast cell line (MRC-5) revealed that 1, 3 and 4 have shown dose dependent cytotoxic effects while HL and 2 have shown steady and low cytotoxic activities. The antibacterial activity of complexes 1–4 is higher than that of HL. Molecular docking study showed an intercalation binding mode for complex 3 with DNA (docking score = −3.6005) involving four polar interactions. Complex 3 docking with tubulin (PDB ID 1SA0) with colchicine as a target protein resulted in three polar interactions (docking score −5.2957). Further, the docking analysis of the HL and 1–4 has shown an adequate interactions with the coronavirus SARS-CoV-2 spike protein, nucleocapsid protein and human angiotensin converting enzyme (ACE2).

Highly hydrophilic quaternary ammonium salt containing organotin (IV) carboxylate for visualization of antibacterial action and multi-photon absorption activity

Antibiotics with multi-photon absorption are expected to play an important role in biomedicine. A novel mononuclear organotin complex RJSnBu3 is designed, synthesized and systematically studied in this work. It is found that RJSnBu3 has a suitable three-photon active cross section under 1400 nm excitation (NIR II region). RJSnBu3 can inhibit the growth of Galanz-positive bacteria (Bacillus subtilis) and Galanz-negative bacteria (Escherichia coli) in the antibacterial screening. Compared to kanamycin, RJSnBu3 has excellent inhibitory effect on Bacillus subtilis. Importantly, the results of in vitro nucleic acid titration and two-photon bacterial imaging shows that RJSnBu3 can damage the bacteria cell membrane. The cytosol flows out when RJSnBu3 binds to DNA, causing the bacteria to die. The multi-photon in vivo imaging results reveal that RJSnBu3 could be ultra-sensitive for detection of colitis mice. These results provide that RJSnBu3 has promising applications for multiphoton imaging and the development of specific antibacterial drugs.

C,O‐Chelated organotin(IV) derivatives as potential anticancer agents: Synthesis, characterization, and cytotoxic activity

AbstractOrganotin(IV) chemistry is nowadays in a continuous expansion due to the biological and medicinal potential found for some of these species. Within this study, the cytotoxic activity of several organotin(IV) compounds was investigated on two lung cancer cell lines (H522 and SK‐MES‐1) and on a normal lung cell line in order to have an overview of the toxicity and the selectivity of these derivatives. Moreover, the synthetic protocols, as well as the structural particularities of the novel organotin(IV) species, are also discussed. Hydrolysis of [2‐{(CH2O)2CR}C6H4]2SnPh2[R = H (1), Me (2)] withp‐toluenesulfonic acid as a proton source afford the expected derivatives [2‐(O═CR)C6H4]2SnPh2[R = H (3), Me (4)]. When hydrochloric acid is used in these reactions, a chlorine‐phenyl exchange took place in addition to the removal of the acetal fragments and the following products [2‐(O═CR)C6H4]2SnPhCl [R = H (5), Me (6)] were isolated. Treatment of5with 2 equiv of 3‐aminomethylpyridine in neat affords the imino(aryl)tin compound 2‐(3′‐PyCH2N═CH)C6H4]2SnPhCl (7). The reaction between6and potassium nicotinate allows the isolation of the organotin(IV) carboxylate [2‐{O═C (CH3)}C6H4]2SnPh[O(O)CC5H4N‐3] (8). Compounds1–8were characterized by multinuclear NMR spectroscopy in solution, mass spectrometry, and IR spectroscopy, and their molecular structures were confirmed by X‐ray diffraction analysis. Compounds1–8were investigated for their antitumoral effects onHomo sapienslung cancer cell lines (H522 and SK‐MES‐1) and on a normal bronchial epithelial cell line, BEAS‐2B.

Synthesis, characterization, and antioxidant material activities of organotin (IV) carboxylates with tin-para methoxy benzoic acid

This study compares whether the antioxidant activity of Para Methoxy Benzoic Acid (L) and its organotin complexes has increased or decreased using methods of: 2,2-diphenyl-1-picrylhydrazyl (DPPH) and CUPRAC technique for di and tri-organotin(IV) compounds. The condensation reactions of Tin-Para Methoxy Benzoic Acid as a ligand with di and tri-organotin(IV) compounds yielded four organotin complexes (1–4). Infrared spectroscopy (FTIR), 119Sn nuclear magnetic resonance (NMR), and 1H NMR techniques were utilized to investigate the resultant complexes. Because of the metal moiety, the ensuing organic tin(IV) complexes exhibited stronger antioxidant activity than the ligands produced from it, and compound 3 had higher antioxidant activity than the others.