Subtopic Deep Dive
Organotin(IV) Carboxylate Complexes
Research Guide
What is Organotin(IV) Carboxylate Complexes?
Organotin(IV) carboxylate complexes are coordination compounds featuring tin(IV) centers bonded to carboxylate ligands and alkyl or aryl groups, characterized by diverse bridging modes and supramolecular structures.
Synthesis typically involves reacting organotin oxides or halides with carboxylic acids, yielding di- and triorganotin(IV) carboxylates (Camacho Camacho et al., 2000; Naqeebullah et al., 2013). Structural characterization employs 1H, 13C, 119Sn NMR, Mössbauer spectroscopy, and X-ray crystallography to elucidate bonding and geometry (Shahid, 2006; Švec et al., 2011). Over 200 papers document these complexes, with key works exceeding 50 citations.
Why It Matters
Organotin(IV) carboxylate complexes exhibit potent antitumor activity against MCF-7 mammary tumor and WiDr colon carcinoma cell lines, as shown in systematic in vitro screening (Gielen, 1994; 58 citations; Gielen, 1995; 15 citations). They demonstrate antifungal efficacy, with di- and tributyltin(IV) carboxylates outperforming standards in comparative assays (Hadi et al., 2008; 13 citations). Applications extend to materials science via tailored supramolecular architectures and electrochemical properties (Švec et al., 2011; 15 citations), while stability studies inform environmental sequestration (Casale et al., 2009; 13 citations).
Key Research Challenges
Structural Diversity in Bonding
Carboxylates adopt monodentate, bidentate, and bridging modes, complicating prediction of coordination geometry. NMR and X-ray studies reveal distortions in diorganotin(IV) complexes (Naqeebullah et al., 2013; 29 citations). Crystallographic analysis is essential yet resource-intensive (Švec et al., 2011; 15 citations).
Biological Activity Mechanisms
Antitumor potency varies with organo substituents and ligands, but apoptosis pathways remain unclear. In vitro tests on MCF-7 and WiDr lines highlight promising candidates without full mechanistic insight (Gielen, 1994; 58 citations; Camacho Camacho et al., 2000; 51 citations).
Stability in Aqueous Media
Dimethyltin(IV) forms complexes with polyamines and amino acids, but empirical stability constants are ligand-specific. Sequestration studies provide binding relationships yet lack broad predictive models (Casale et al., 2009; 13 citations).
Essential Papers
TIN-BASED ANTITUMOUR DRUGS
Marcel Gielen · 1994 · Main Group Metal Chemistry · 58 citations
An overview is given of the in vitro test results on MCF-7, a mammary tumour, and WiDr, a colon carcinoma, of several series of organotin compounds synthesized in the Free University of Brussels VU...
ORGANOTIN(IV) DERIVATIVES OF 3,4-(METHYLENEDIOXY) PHENYLACETIC ACID: SYNTHESIS, SPECTROSCOPIC CHARACTERIZATION AND IN VITRO ANTITUMOUR PROPERTIES
Carlos Camacho Camacho, Dick de Vos, Bernard Mahieu et al. · 2000 · Main Group Metal Chemistry · 51 citations
The triphenyltin and tri-M-butyltin 3,4-(methylenedioxy)phenylacetates as well as the tetra-n-butylbis[3,4fmethylenedioxy)phenylacetato]distannoxane dimer have been synthesized and characterized by...
Diorganotin(IV) Derivatives of N-Methyl p-Fluorobenzo-Hydroxamic Acid: Preparation, Spectral Characterization, X-ray Diffraction Studies and Antitumor Activity
Naqeebullah, Yang Farina, Kok Meng Chan et al. · 2013 · Molecules · 29 citations
Three diorganotin(IV) complexes of the general formula R2Sn[RcC(O)N(RN)O] (Rc = aryl, RN = Alkyl) have been synthesized by refluxing in toluene the corresponding diorganotin(IV) oxides with the fre...
Novel Tl(III) complexes containing pyridine-2,6-dicarboxylate derivatives with selective anticancer activity through inducing mitochondria-mediated apoptosis in A375 cells
Sara Abdolmaleki, Mohammad Ghadermazi, Alireza Aliabadi · 2021 · Scientific Reports · 26 citations
Synthesis, Spectroscopic Studies and Biological Applications of Organotin(IV) Derivatives of 3-[N-(4-Nitrophenyl)-amido]propenoic Acid and 3-[N-(4-Nitrophenyl)-amido]propanoic Acid
Khadija Shahid · 2006 · Bulletin of the Korean Chemical Society · 19 citations
New organotin(IV) derivatives with general formulae <TEX>R_2SnL_2</TEX> and <TEX>R_3SnL</TEX>, where R = methyl, n-butyl, n-octyl and phenyl and HL is either 3-[N-(4-nitrophenyl)amido]-propenoic ac...
The Synthesis and Biological Activity of Organotin Complexes with Thio-Schiff Bases Bearing Phenol Fragments
Ivan V. Smolyaninov, Andrey I. Poddel’sky, Daria A. Burmistrova et al. · 2023 · International Journal of Molecular Sciences · 19 citations
A number of novel di- and triorganotin(IV) complexes 1–5 (Ph2SnL1, Ph2SnL2, Et2SnL2, Ph3SnL3, Ph3SnL4) with mono- or dianionic forms of thio-Schiff bases containing antioxidant sterically hindered ...
Synthesis, structural characterization and electrochemistry of C,N-chelated organotin(IV) dicarboxylates with ferrocenyl substituents
Petr Švec, Z. Padělková, Petr Štěpnička et al. · 2011 · Journal of Organometallic Chemistry · 15 citations
Reading Guide
Foundational Papers
Start with Gielen (1994; 58 citations) for antitumor context and synthesis overview, then Camacho Camacho et al. (2000; 51 citations) for spectroscopic characterization protocols, followed by Naqeebullah et al. (2013; 29 citations) for X-ray structures.
Recent Advances
Study Smolyaninov et al. (2023; 19 citations) for phenol-thio Schiff base variants and Abdolmaleki et al. (2021; 26 citations) for related Tl(III) carboxylate anticancer parallels.
Core Methods
Core techniques include 1H/13C/119Sn NMR, 119mSn Mössbauer, ESI-MS, single-crystal X-ray diffraction, and in vitro cytotoxicity assays on MCF-7/WiDr lines (Švec et al., 2011; Shahid, 2006).
How PapersFlow Helps You Research Organotin(IV) Carboxylate Complexes
Discover & Search
Research Agent uses searchPapers and citationGraph to map high-citation works like Gielen (1994; 58 citations), then findSimilarPapers uncovers related carboxylate syntheses. exaSearch retrieves niche structural studies beyond OpenAlex indexing.
Analyze & Verify
Analysis Agent applies readPaperContent to extract NMR and Mössbauer data from Camacho Camacho et al. (2000), verifies coordination modes via verifyResponse (CoVe), and runs PythonAnalysis for statistical correlation of 119Sn chemical shifts with antitumor activity using pandas. GRADE grading scores evidence strength for biological claims.
Synthesize & Write
Synthesis Agent detects gaps in aqueous stability data across Casale et al. (2009) and Naqeebullah et al. (2013), flags contradictions in bonding modes. Writing Agent employs latexEditText for structural formulas, latexSyncCitations for 50+ references, and latexCompile for publication-ready reviews; exportMermaid visualizes supramolecular networks.
Use Cases
"Analyze 119Sn NMR shifts vs antitumor IC50 in diorganotin carboxylates"
Research Agent → searchPapers → Analysis Agent → readPaperContent (Gielen 1994, Camacho Camacho 2000) → runPythonAnalysis (pandas correlation plot) → matplotlib output of shift-activity trends.
"Draft review on organotin carboxylate synthesis with crystal structures"
Synthesis Agent → gap detection → Writing Agent → latexEditText (schemes) → latexSyncCitations (Švec 2011 et al.) → latexCompile → PDF with embedded X-ray diagrams.
"Find code for modeling tin-carboxylate geometries"
Research Agent → paperExtractUrls (Naqeebullah 2013) → paperFindGithubRepo → githubRepoInspect → Python scripts for DFT optimization of R2Sn(carboxylate)2 structures.
Automated Workflows
Deep Research workflow systematically reviews 50+ papers on antitumor organotins, chaining citationGraph → readPaperContent → GRADE → structured report with IC50 meta-analysis. DeepScan applies 7-step verification to spectroscopic claims in Shahid (2006), using CoVe checkpoints and runPythonAnalysis for δ(119Sn) validation. Theorizer generates hypotheses on carboxylate bridging effects from Gielen (1994) and Casale (2009) datasets.
Frequently Asked Questions
What defines organotin(IV) carboxylate complexes?
These are Sn(IV) compounds with carboxylate ligands in mono-, bi-, or polydentate modes and R groups (R = Me, Bu, Ph), synthesized via oxide or halide reactions (Camacho Camacho et al., 2000).
What are key synthesis methods?
Refluxing diorganotin(IV) oxides with carboxylic acids in toluene yields R2SnL2; triorganotins form R3SnL via similar routes (Naqeebullah et al., 2013; Shahid, 2006).
What are the most cited papers?
Gielen (1994; 58 citations) overviews antitumor testing; Camacho Camacho et al. (2000; 51 citations) details synthesis and NMR of methylenedioxyphenylacetates.
What open problems exist?
Mechanisms of selective anticancer activity, predictive stability models in water, and scalable synthesis for supramolecular materials remain unresolved (Gielen 1995; Casale et al., 2009).
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